CPU Mechanization, Power, Machinery & Equipment Exam Questions PDF

MECHANIZATION, POWER, MACHINERY & EQUIPMENT & ALLIED SUBJECTS BOARD EXAM COMPILATION AND REVIEW MATERIALS UPDATED Prepared by: ESTEH FRANK DFE CENTRAL PHILIPPINE UNIVERSITY (CPU) ILO-ILO CITY 1 ...

MECHANIZATION, POWER, MACHINERY & EQUIPMENT & ALLIED SUBJECTS BOARD EXAM COMPILATION AND REVIEW MATERIALS UPDATED Prepared by: ESTEH FRANK DFE CENTRAL PHILIPPINE UNIVERSITY (CPU) ILO-ILO CITY 1  MECHANIZATION, POWER, MACHINERY & EQUIPMENT & ALLIED SUBJECT (A) 1. Which of the following is not part of a force pump? a. inlet valve b. piston c. plunger d. discharge valve 2. What do you call a device that forces more fuel mixture into the cylinders than would be drawn in under normal atmospheric conditions, thus making possible greater power output with the same piston displacement. a. carburetor b. supercharger c. throttle d. venturi 3. Arrange the following according to the process of management. i. Selecting the right employees for the right position ii. Formulation of the mission, vision, goals, objectives and activities of the organization iii. Conducting of annual performance evaluation of employees. iv. Coordinating the employees and material resources of the organization. v. Orientation of personnel for the proper achievement of goals. a. i, ii, iii, iv, v b. ii, iv, I, iii, v c. ii, I, v, iv, iii d. ii, iv, I, v, iii 4. The gasoline engine is characterized as: a. low first cost – high operating cost b. low first cost – low operating cost c. high first cost – high operating cost d. high first cost – low operating cost 5. The thermal efficiency and mechanical efficiency of an engine are 40% and 72%, respectively. Determine the power equivalent of the fuel used if the brake horsepower is 1.35 hp. a. 2.0 kW b. 4.0 kW c. 2.5 kW d. 3.5 kW 2 6. A belt delivers a tangential force of 150 N on a half meter radius pulley at a speed of 380 rev/min. What will be the power? P= F x d x S(2pi/rev) a. 2.0 kW b. 0.5 kW c. 3.0 kW d. 3.5 kW 7. Commodity surplus occurs when the selling price is ____(X) ___, but equilibrium is attained when the sellers agree to sell at a price at which _____(Y)_____ are willing to buy. a. X = High; Y = Vendors b. X = Low; Y = Vendors c. X = Low; Y = Consumers d. X = High; Y = Consumers 8. For a 4 inches by 4 inches centrifugal pump with discharge of 250 gpm, determine the size of the diesel engine. Efficiency of the pump is 65%, of the belt transmission is 95%, and of the air-cooled system is 80%. Total head is 30 ft. a. 2.9 hp b. 3.1 hp c. 3.8 hp d. 2.5 hp 9. Which pair is mismatched? a. consumer good – personal effects b. service – housecleaning c. inelastic demand – food d. producer good – clothes 10-12. A 1000-hectare farm shall be planted with hybrid corn, with the following operations being mechanized: Operation No of Passes Maximum Number of Days Required to Complete Operation Land Preparation: Plowing 1 90 days Harrowing 2 75 days Planting 1 75 days Spraying as required Harvesting 1 90 days Other information includes: Width of cut of 3-bottom disc plows 160 cm Width of cut of disc trailing harrow 220 cm Corn planters 4-row units Corn picker-sheller 1-row unit Plowing, harrowing speed 4 kph Row spacing 1 m Field efficiency 80% Planting and harvesting speed 5 kph 3 10. Estimate the number of tractors needed. a. 5 b. 6 c. 7 d. 8 11. Estimate the number of picker-sheller. a. 2 b. 3 c. 4 d. 5 12. Assuming 100 days of maturity, what is the cycle time in days? a. 270 b. 229 c. 291 d. 250 13. In management, this is doing the right things. a. Efficiency b. competence c. reliability d. effectiveness 14. Given the following data for a four-wheel tractor equipped with a three- bottom disk plow. Mass: Tractor, kg 3800 Carried by the front wheel, kg 1600 Carried by the rear wheel, kg 2050 Wheel base, mm 3168 Drawbar dynamometer reading, kg 602 Angle between the horizontal and the line of draft 15O Assuming dynamic condition of equilibrium while plowing, calculate the weight (in kg) transferred from the front wheels if the drawbar clearance is 48 cm from the ground level and the plane 16 cm horizontally from the soil vertical reactions at the wheels. Neglect other minor forces acting on the tractor. a. 92 b. 93 c. 94 d. 95 15. Of corresponding size and speed, single-cylinder engines compared to multi-cylinder engines will require __________ flywheels. a. Lighter b. thinner c. heavier d. a or b 4 16. The windmill for water pumping is characterized as: a. low torque – high speed b. high torque – high speed c. high torque – low speed d. low torque – low speed 17. If money is worth 8.7% simple interest, how long (in months) from today will the value become P37,501.50 of a debt of P36,000.50 due 6 months from today? a. 0 b. 2 c. 4 d. 12 18. Which of the following agencies is not based in a university? a. AMTEC b. PhilSCAT c. AMDP d. PCARRD 19. The following are considered discounted measures of project worth: a. payback period b. internal rate of return c. benefit-cost ratio d. net present value 20. General-purpose tillage involves cutting and pulverizing the soil to a depth of: a. up to 3 inches b. up to 6 inches c. up to 12 inches d. up to 18 inches 21. Bend downward of the point of the share to make the plow penetrate the soil to the proper depth is: a. tilt angle b. disc angle c. horizontal suction d. vertical clearance 22. Width of cut of the disc plow is influenced by: a. disc diameter b. depth of cut c. disc angle d. all of the above 5  SWEff 23. In the equation C = 10 , W is width of cut expressed in: a. ft. b. m c. km d. mile 24. General-purpose tillage equipment is used in: a. 2-wheel tractor for wetland op. b. 4-wheel tractor for dryland op. c. 4-wheel tractor for wetland op. d. all of the above 25. Planter designed to place seedlings in rows and in hills is called: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. transplanter 26. The IRRI drum seeder is an example of: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. broadcaster QxH 27. In the equation for horsepower, Hp = 3960xEff , H is total head in: a. ft. b. ft/min c. meters d. meters/min 28. The power unit for driving centrifugal pumps for household use is usually: a. electric motor b. gasoline engine c. diesel engine d. kerosene engine 29. The most recently developed system of harvesting and threshing of rice is: a. mechanical harvesting & threshing b. combining c. stripping d. all of the above 6 30. A machine that cuts standing crop, conveys the cut crop to one side, and lays them down in an orderly manner is called: a. sickle b. reaper-windrower c. reaper-binder d. stripper 31. The Japanese combine is characterized as: a. low power & hold-on feeding b. low power & throw-in feeding c. high power & hold-on feeding d. high power & throw-in feeding 32. A 4-ha field was plowed using a three-bottom 12-inch tractor-mounted moldboard plow. It took 11 hrs to complete the operation at a tractor speed of 5 kph. Find the theoretical field capacity: a. 0.46 ha/hr b. 1.45 ha/hr c. 1.13 ha/hr d. 1.8 ha/hr 33. How many times greater is the power of a carabao over man? a. 0.1 b. 1.0 c. 10 d. 100 34. The fertility of a particular field is such that maximum corn yield is obtained with a population of 54,000 plants per hectare. A checkrow corn planter is used which discharges 2 seeds/hill. Average emergence is 85%. Row spacing = hill spacing. Find the spacing: a. 0.56 m b. 0.75 m c. 0.65 m d. 1.0 m 35. The calibration of the 9X7 (9 rows X 7 inches row spacing) grain drill is shown below. Row spacing is to be adjusted to 14 inches. Groundwheel diameter is 1.22 m. Discharge (gm) Seeding (9 rows for 10 revolutions of Adjustment groundwheel) ¼ Open 140 ½ Open 460 ¾ Open 740 Full Open 1,100 7 What is the seeding rate at ¾ adjustment? a. 60 kg/ha b. 70 kg/ha c. 80 kg/ha d. 90 kg/ha 36. A 5-m self-propelled combine makes an average stop of 4 min every time its 2-ton grain tank is to be unloaded. Gross yield of the 20-ha field is 42 tons. The operating speed is 4.8 kph. The time for turning on the headland at the ends of the 500-m field is 15 seconds. Find the actual field capacity: a. 1.5 ha/hr b. 2.5 ha/hr c. 2.0 ha/hr d. 3.0 ha/hr 37. A 4-wheel tractor with 3X14 inches moldboard plow is to operate on clay loam soil (specific draft = 0.56 kg/cm2) at a depth of 25.4 cm. The maximum draft and percent increase in draft due to speed are: Max. Draft Increase in draft due to Gear Setting Speed (kph) (kg) speed (%) 1L 3.2 4,000 14 2L 4.8 3,100 28 3L 6.4 2,200 42 4L 8.0 1,300 56 Determine the drawbar horsepower to perform the operation. a. 45 hp b. 50 hp c. 55 hp d. 60 hp 38. The application rate of a certain chemical is recommended at 4 kg/ha. The calibration test of a 16-liter knapsack sprayer is as follows: Nozzle discharge = 1.2 liters/min, swath = 1.5 m and walking speed = 20 m/min Determine the amount of chemical to mix with water per loading: a. 102 gms/load b. 160 gms/load c. 200 gms/load d. 240 gms/load 39. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine the field efficiency in going the longer field direction: a. 77% b. 80% c. 83% d. 86% 8 40. Select two consecutive farm operations which when done mechanically can increase cropping intensity: a. planting – spraying b. irrigation – weeding c. harvesting – plowing d. harvesting – threshing 41. Which of the following operation is not done by a stripper? a. cutting of standing crop b. stripping c. cleaning of grains d. conveying of grains to the tank 42. The cutting mechanism most commonly employed by reapers and combines is: a. slicing & tearing b. high velocity, single-element, impact action c. two-element, scissor-type action d. all of the above 43. The IRRI axial-flow thresher is characterized as: a. low power & hold-on feeding b. low power & throw-in feeding c. high power & hold-on feeding d. high power &throw-in feeding 44. What section is not yet included in the PAES as of 2014? a. Production/postharvest machinery b. Irrigation and drainage c. agricultural structures d. engineering materials 45. A 4-ha field was plowed using a three-bottom 12-inch tractor-mounted moldboard plow. It took 11 hrs to complete the operation at a tractor speed of 5 kph. Find the actual field capacity: a. 0.09 ha/hr b. 0.5 ha/hr c. 0.36 ha/hr d. 1.5 ha/hr 46. Which is true about V-belt and pulley drive? a. It cannot be used for long center distance drive. b. Efficiency drops with small pulley size. c. Its application is limited only for parallel drive. d. Excessive high load increases efficiency. 9 47. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine actual field capacity when tilling is done along the longer field direction: a. 0.23 ha/hr b. 0.25 ha/hr c. 0.27 ha/hr d. 0.29 ha/hr 48. Parameter not required in determining the field capacity of a planter: a. width of planter b. forward speed of planter c. No. of seeds per hill d. efficiency of planter 49. Type of soil working parts utilized by push-type weeders for wetland operation: a. blade type b. tine type c. rotary type d. all of the above 50. Which of the following is not measured in calibrating a sprayer? a. nozzle discharge b. effective working width c. walking speed d. application rate 51. Which of the following does not belong to the group of positive displacement pumps? a. lift pump b. force pump c. rotary pump d. propeller pump 52. According to the National Irrigation Administration (NIA), water requirement for rice production is: a. 5 mm/day b. 10 mm/day c. 15 mm/day d. 20 mm/day 53. If the specific yield of a particular well is 3 gpm/ft drawdown and the discharge rate of the pump is 30gpm, the total drawdown is: a. 1 ft b. 3 ft c. 10 ft d. 30 ft 10 54. It is made by partial combustion of carbonaceous substances like coal and wood. a. natural gas b. propane c. LPG d. producer gas 55. A farmer figured that he needed 8 pieces 2” x 4” x 12’ and 10 pieces 2” x 3” x 12’ lumber to make tables and chairs for their barangay hall. He availed them from a newly-opened local hardware shop, named J.E.R. Hardware Supplies, which charges P25 for every board foot of lumber. However, to gain patronage, the shop gave 15% discount for the first 50 board feet of purchased lumber. How many board feet of lumber are needed for the farmer’s project? a. 248 b. 156 c. 62 d. 124 56. How much did the farmer actually paid for his purchase? a. approx. 4000 pesos b. approx. 6000 pesos c. approx. 3500 pesos d. approx. 3000 pesos 57. How many degrees has the crankshaft rotated if the piston has traveled 4.25 cm with respect to its top dead position in a 3.5” by 5” diesel engine? a. 60O b. 45O c. 90O d. 75O 58. The tractor is generally characterized as: a. high speed – heavy load b. high speed – light load c. low speed – heavy load d. low speed – light loaD 11 59. What is the depreciation factor per year of a hand tractor that is bought at P150, 000.00, if it has no more value at the end of the fifth year? a. 25,000 pesos/year b. 30,000 pesos/year c. 60,000 pesos/year d. 15,000 pesos/year 60. What is the depreciation factor per year, of a hand tractor that is bought at 60,000 Pesos, if it has no more value at the end of the fifth year? a. 5000 pesos/year b. 10,000 pesos/year c. 12,000 pesos/year d. 6000 pesos/year 61. What is the hand tractor’s book value after 3 years? a. 48,000 pesos b. 12,000 pesos c. 24,000 pesos d. 36,000 pesos 62. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine the theoretical field capacity a. 0.25 ha/hr b. 0.3 ha/hr c. 0.35 ha/hr d. 0.4 ha/hr 63. The three main sources of power for mechanization include: a. human, animal & mechanical b. human, electrical & mechanical c. animal, electrical & mechanical d. human, animal & electrical 64. Before the adoption of mechanized harvest and postharvest operations for rice, field losses were: a. 5 – 15% b. 10 – 27% c. 10 – 37% d. 20 – 30% 65. In optimizing the capacity of a machine, it is recommended to have: a. one small machine b. one big machine c. two or more small machines d. all of the above 66. Primary tillage involves cutting the soil to a depth of: 12  a. up to 3 inches b. 3 to 6 inches c. 6 to 18 inches d. 6 to 36 inches 67. Primary tillage equipment that cuts the soil to a depth of 6 to 18 inches is called: a. moldboard plow b. subsoiler c. chisel plow d. spiral plow 68. The perpendicular distance between the wing and point of the share determines the: a. longitudinal dimension of plow b. transverse dimension of plow c. diagonal dimension of plow d. maximum dimension of plow 69. Draft of plows is primarily determined by: a. type of soil b. speed of plowing c. sharpness of cutting edge d. overall adjustment of plow QxH 70. In the equation for horsepower, Hp = , H is total head in: 3960xEff a. ft. b. ft/min c. meters d. meters/min 71. The power unit for driving centrifugal pumps for household use is usually: a. electric motor b. gasoline engine c. diesel engine d. kerosene engine 72. A machine that cuts standing crop, conveys the cut crop to one side, and lays them down in an orderly manner is called: a. sickle b. reaper-windrower c. reaper-binder d. stripper 73. The Japanese combine is characterized as: a. low power & hold-on feeding b. low power & throw-in feeding c. high power & hold-on feeding d. high power & throw-in feeding 74. How many volumes of PAES were adopted by the Department of Agriculture? 13  a. two b. three c. four d. five 75. A 4-ha field was plowed using a three-bottom 12-inch tractor-mounted moldboard plow. It took 11 hrs. to complete the operation at a tractor speed of 5 kph. Find the theoretical field capacity: a. 0.46 ha/hr b. 1.45 ha/hr c. 1.13 ha/hr d. 1.8 ha/hr 76. The fertility of a particular field is such that maximum corn yield is obtained with a population of 54,000 plants per hectare. A checkrow corn planter is used which discharges 2 seeds/hill. Average emergence is 85%. Row spacing = hill spacing. Find the spacing: a. 0.56 m b. 0.75 m c. 0.65 m d. 1.0 m 77. The acronym PAES means: a. Philippine Agricultural Engineering Society b. Professional Agricultural Engineering Society c. Philippine Agricultural Engineering Standards d. Professional Agricultural Engineering Standards 78. The development of PAES started in: a. 1985 b. 1990 c. 1995 d. 2000 79. Which of the following agencies is not based in a university? a. AMTEC b. PhilSCAT c. AMDP d. PCARRD 80. The word used to indicate requirements strictly to be followed in order to conform to the standard and from which no deviation is permitted: a. Shall b. Should c. a or b d. none of the above 81. What section is not yet included in the PAES? 14  a. Production/postharvest machinery b. Irrigation and drainage c. agricultural structures d. engineering materials 82. The Consumer Act of the Philippines of is covered under: a. DA AO 11 S2001 b. PRC BR 05 S2002 c. RA 7394 d. RA 8559 83. Agency of the government charged with the development of the Philippine National Standards (PNS): a. BOAE-PRC b. NAFC-DA c. BPS-DTI d. DOH 84. Two persons are threshing by “Hampasan” method. What is the total human power generated by the two persons in one day if they work at an average of 6 hours? a. 0.5 hp/person; 1.0 hp b. 0.15 hp/person; 0.30 hp c. 0.11 hp/person; 0.22 hp d. 0.12 hp/person; 0.24 hp 85. It is the peak of the turned furrow slice. a. Furrow crown b. Furrow slice c. Furrow wall d. None of the above 86. Threshing efficiency basically is determined from weight of grain obtained at the ___ to the grain input fed at the feeding trays. a. straw outlet b. oscillating screen outlet c. blower outlet d. All of the above 87. Grain-straw ratio requirement for testing a rice thresher ranges from ___. a. 0.35 to 0.50 b. 0.50 to 0.65 c. 0.65 to 0.80 d. All of the above 88. Ignition of fuel in a gasoline fuel engine usually starts when the piston is __________. 15  a. at the top dead center b. moving downward the bottom dead center c. approaching the top dead center d. None of the above 89. It is the power developed by the engine of a tractor which is available for pulling, dragging or similar tractive effort. a. belt horsepower b. brake horsepower c. drawbar horsepower d. indicated horsepower 90. One way of increasing engine power is to force more air into the cylinder so that more power can be produced from each power stroke. This process which uses a type of air compression device powered by the engine crankshaft is called: a. turbocharging b. supercharging c. power charging d. air charging 91. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine the field efficiency in going the shorter field direction: a. 77% b. 80% c. 84.4% d. 86% 92. The mechanical manipulation of soil for any purpose. a. Land grading b. Tillage c. Earth moving d. None of the above 93. The pushing or rolling of soil by a steeply inclined blade. a. Bulldozing b. Chiselling c. Subsoiling d. None of the above 94. The draft of a plow is dependent on the ___. a. size of the plow b. plowing depth c. type of soil d. All of the above 16 95. The factors that affect the draft of the plow: a. Soil condition b. Hitch to the tractor c. Topography d. All of the above 96. What is the force required to pull a single-moldboard plow on a clay-loam soil having a width and depth of cut of 30 cm and 15 cm, respectively. Soil draft is 8 psi. a. 314 kg b. 253 kg c. 157 kg d. None of the above 97. If the plow above has an average speed of 5 km/hr, what is its drawbar horsepower? a. 4.6 hp b. 3.4 hp c. 5.1 hp d. None of the above 98. The effective field capacity of the rotary tiller tilling theoretically at 0.4 ha/hr for efficiency of 85% is ___. a. 0.34 ha/hr b. 0.24 ha/hr c. 0.43 ha/hr d. None of the above 99. The effective field capacity of 2 moldboard plows having 25-cm width each plowing at a speed of 7 km/hr for a field efficiency of 80% is ___. a. 0.20 ha/hr b. 0.28 ha/hr c. 0.32 ha/hr d. 0.32 ha/hr 100. A mechanically-operated machine that removes weeds or grasses from the crops. a. Seeder b. Weeder c. Cultivator d. None of the above 17  MECHANIZATION, POWER, MACHINERY & EQUIPMENT & ALLIED SUBJECT (B) 1. The ratio between the numbers of weeds removed by the weeder to the number of weeds present per unit area. a. Weeding index b. Weeding rate c. Weeding capacity d. None of the above 2. When a machine is driven directly from the shaft of a power source, the power is transmitted using ___. a. gear drive b. sprocket and chain drive c. direct drive d. None of the above 3. If 10-Hp engine drive has a belt capacity rating of 4.5 hp per belt, how many pieces of belts are needed for the drive? a. 1 to 2 belts b. 2 to 3 belts c. 4 to 6 belts d. None of the above 4. A rice thresher is to be driven by a 10-hp gasoline engine using V-belt drive. The engine speed is 1800 rpm while the thresher cylinder speed is 650 rpm. The diameter of the engine pulley is 4 inches. What will be the recommended diameter of the thresher’s pulley? a. 6 in. b. 11 in. c. 14 in. d. None of the above 5. What is the recommended belt size for the B-type V-belt needed for the drive above, if its center distance is 60 in.? a. B169 b. B144 c. B196 d. None of the above 6. The recommend size of the shaft for the thresher above is ___. a. ½ in. b. ¾ in c. 1 in d. None of the above 18 7. A diesel engine that operates at 2500 rpm will be used to drive an irrigation pump, which should turn at 1000 rpm. The pulley diameter for the pump is 4 inches. What is the recommended pulley diameter for the engine? a. 2 in. b. 4 in. c. 10 in. d. None of the above 8. The ratio between the mass of fuel consumed per unit time and the corresponding power measured. a. Specific fuel consumption b. Fuel to mass ratio c. Fuel consumption rate d. None of the above 9. Assume that you are the Agricultural Engineer in-charge of a 500-hectare corn farm with soil type that gives 10 psi draft when plowing at a speed of 4 km/hr. Compute the drawbar horsepower required to pull a three-disk plow with 12 inches effective cut per disk at 6 inches plowing depth. a. 14.3 hp b. 23.4 hp c. 34.5 hp d. None of the above 10. How many hectares of the farm above a tractor can plow in one day (16 hours operation) if it is pulling a three-disk plow? Assume a total time loss of 30%. a. 2 ha/day b. 4 ha/day c. 6 ha/day d. None of the above 11. How many days would be required to plow the entire 500-hectare farm above if ten units of the same kind of tractor and plow will be used? a. 8.3 days b. 12.5 days c. 15.4 days d. None of the above 12. Referring to the items above, how much fuel a tractor consumes in liters per 16-hours day if the specific fuel consumption is 1 lb/dhp-hr and the specific gravity of the fuel is 0.8? a. 1546 liters b. 130.0 liters/hr c. 95.1 liters/hr d. None of the above 13. Calculate the drawbar hp required to pull a plow with 3X14-in bottoms at the rate of 3.25 mph if the specific draft is 8 psi and depth of cut is 7 inches. 19  a. 6.8 hp b. 13.6 hp c. 20 hp d. 27.2 hp 14. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine actual field capacity when tilling is done along the longer field direction. a. 0.23 ha/hr b. 0.25 ha/hr c. 0.27 ha/hr d. 0.29 ha/hr 15. As a rule of thumb, single-phase alternating current electric motor should be used for applications requiring: a. < 4 hp b. < 5 hp c. < 6 hp d. < 7 hp 16. A 1.2-m wide floating tiller is used for rotary tilling/puddling a 24-m X 42-m wetland paddy field. The average speed of travel is 3 kph and turning at the headlands takes 10 seconds. What is the field efficiency if the field is worked along its length? a. 71 % b. 74 % c. 79 % d. 84 % 17. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine the field efficiency in going the longer field direction. a. 77% b. 80% c. 83% d. 86% 18. The fertility of a particular field is such that maximum corn yield is obtained with a population of 54,000 plants per hectare. A checkrow corn planter is used which discharges 2 seeds/hill. Average emergence is 85%. Row spacing = hill spacing. Find the spacing. HILL SPACING 4MLA a. 0.56 m b. 0.75 m c. 0.65 m d. 1.0 m 20 19. If there are 2.7M animals in the farms, 70 – 74 % of them are used for draft work and 12M ha of agricultural lands, the contribution of animal power in the farm is: a. 0.12 hp/ha b. 0.16 hp/ha c. 0.21 hp/ha d. 0.23 hp/ha 20. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine the field efficiency in going the shorter field direction. a. 77% b. 80% c. 83% d. 86% 21. The projection of cash inflow and outflow of a farm to estimate the incremental net benefit of the life of the project is known as: a. Farm budget b. Farm plan c. Farm inventory d. Farm contract 22. The gearbox placed on first gear will develop… a. high torque - high speed b. low torque – low speed c. high torque – low speed d. low torque – high speed 23. Tractor A can cover a 1-Ha field in 2 hrs, tractor B in 3 hrs, and tractor C in 6 hrs. How long will it take to cover a 1-Ha field if the three tractors worked together? a. 0.5 hr b. 1.0 hr c. 1.5 hr d. 2.0 hr 24. A transaction by your company this year involving the repayment in cash of a portion of the long term loan of the company in the amount of P 70,000.00 would have the following effect: a. increase in assets = increase in liabilities b. decrease in assets = decrease in liabilities c. increase in assets = increase in ownership d. increase in one asset= decrease in another asset 25. It results in the reduction of the purchasing power of monetary unit. a. deflation b. devaluation c. incision d. inflation 21 26. A six-bottom moldboard plow is to be used to plow a heavy soil. How many scrapers are there in the plow? a. 2 c. 6 b. 4 d. None of the above 27. It is a part of the plow that connects the plow bottom and the frame. a. Upper hitch point b. Boom c. Shank d. None of the above 28. Material recommended by PAES for use as implement frame. a. Mild steel b. Cold rolled steel c. Spring steel d. None of the above 29. Material recommended by PAES in the manufacture of disk blade. a. Mild steel b. Carbon steel c. Cast iron d. None of the above 30. When a disk harrow consists of a front and rear gangs and is centrally positioned with the tractor, it is classified as _________? a. Single action harrow b. Double action harrow c. Offset harrow d. None of the above 31. When a disk harrow consists of a front gang only and is centrally positioned with the tractor, it is classified as _________? a. Single action harrow b. Double action harrow c. Offset harrow d. None of the above 32. When a disk harrow consists of a front and/or rear gangs and is not centrally positioned with the tractor, it is classified as _________? a. Single action harrow b. Double action harrow c. Offset harrow d. None of the above 33. The angle between the axis of the set of disks and the line perpendicular to the direction of the implement. a. Disk angle b. Gang angle c. Implement angle d. None of the above 22 34. The horizontal seed plate is used for: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. broadcaster 35. The calibration of the 9X7 (9 rows X 7 inches row spacing) grain drill is shown below. Row spacing to be adjusted to 14 inches. Groundwheel diameter is 1.22 m. Discharge (gm) Seeding (9 rows for 10 revolutions of Adjustment groundwheel) ¼ Open 140 ½ Open 460 ¾ Open 740 Full Open 1,100 What is the seeding rate at ¼ open seeding adjustment? a. 5 kg/ha b. 11 kg/ha c. 8 kg/ha d. 20 kg/ha 36. Planters designed to plant seeds continuously in rows with row spacing greater than 36 cm is called: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. broadcaster 37. The groundwheel of a planter is normally related to the operation of the: a. furrow opener b. metering device c. seed tube d. double-disc closer 38. Part of a planter that is always present in all planters regardless of type and cropping system: a. furrow opener b. metering device c. seed tube d. furrow closer 39. A spark ignition engine was tested with BHP output of 9.6 horsepower. If the ambient condition during the test is 30°C ambient air temperature, what is the corrected BHP of the engine? The total atmospheric air condition is 1011 mbar. a. 7.78 hp b. 6.78 hp c. 9.78 hp d. 8.78 hp 23 40. Two kilogram of rice is to be prepared for cooking. Estimate the time required to cook it. a. 10.92 min b. 11.92 min c. 12.92 min d. 13.92 min 41. The calibration of the 9X7 (9 rows X 7 inches row spacing) grain drill is shown below. Row spacing is to be adjusted to 14 inches. Groundwheel diameter is 1.22 m. Discharge (gm) Seeding (9 rows for 10 revolutions of Adjustment groundwheel) ¼ Open 140 ½ Open 460 ¾ Open 740 Full Open 1,100 What is the seeding rate at ½ adjustment? a. 25 kg/ha b. 68 kg/ha c. 38 kg/ha d. 79 kg/ha 42. Planter designed to plant seeds in rows and in hills is called: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. broadcaster 43. The adjustable orifice with agitator is used for: a. row-crop drill planter b. hill-drop planter c. broadcaster d. transplanter 44. Parameter not required in the calibration of a planter is: a. row spacing b. ave. seed emergence c. forward speed d. groundwheel diameter 45. The fertility of a particular field is such that maximum corn yield is obtained with a population of 54,000 plants per hectare. A checkrow corn planter is used which discharges 2 seeds/hill. Average emergence is 85%. Row spacing = hill spacing. Find the spacing: a. 0.56 m b. 0.75 m c. 0.65 m d. 1.0 m 24 46. The calibration of the 9X7 (9 rows X 7 inches row spacing) grain drill is shown below. Row spacing is to be adjusted to 14 inches. Groundwheel diameter is 1.22 m. Discharge (gm) Seeding Adjustment (9 rows for 10 revolutions of groundwheel) ¼ Open 140 ½ Open 460 ¾ Open 740 Full Open 1,100 What is the seeding rate at ¾ adjustment? a. 60 kg/ha b. 70 kg/ha c. 80 kg/ha d. 90 kg/ha 47. Two persons are doing the threshing operation by “Hampasan” method. What is the total human power generated by the two persons in one day if they work an average of 6 hours? a. 2.22 Hp b. 1.22 Hp c. 0.22 Hp d. 0.12 Hp 48. Planter designed to place seedlings in rows and in hills is called: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. transplanter 49. An engine was tested on a brake dynamometer at a speed of 2000 rpm. The brake arm of the machine is 1.2 meters and it registers a load of 5 kg. What is the shaft power of the engine? a. 14.51 hp b. 11.51 hp c. 16.51 hp d. 12.51 hp 50. The IRRI drum seeder is an example of: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. broadcaster 51. Parameter not required in determining the field capacity of a planter: a. width of planter b. forward speed of planter c. No. of seeds per hill d. efficiency of planter 25 52. The calibration of the 9X7 (9 rows X 7 inches row spacing) grain drill is shown below. Row spacing is to be adjusted to 14 inches. Groundwheel diameter is 1.22 m. Discharge (gm) Seeding (9 rows for 10 revolutions of Adjustment groundwheel) ¼ Open 140 ½ Open 460 ¾ Open 740 Full Open 1,100 What is the seeding rate at full open adjustment? a. 60 kg/ha b. 70 kg/ha c. 80 kg/ha d. 90 kg/ha 53. Using the specifications of the transmission system of the metering devise (horizontal seed plate) of the two-row corn planter, determine the expected hill spacing. Row spacing = 75 cm, groundwheel diameter = 60 cm, no. of cells of seedplate = 20, T1 = 6t, T2 = 18t, T3 = 10t and T4 = 25t a. 0.62 m b. 0.81 m c. 0.71m d. 0.92 m 54. A person is working for 4 hours in a farm harvesting. Estimate the power that can be generated by the person in doing the job. a. 0.13 hp b. 0.33 hp c. 0.53 hp d. 0.43 hp 55. Method of pest control not considered engineering control is: a. chemical control b. biological control c. mechanical control d. a and b 56. Sprayers are used primarily for the application of : a. herbicides b. insecticides c. fungicides d. pesticides 57. Which of the following is not a spray nozzle pattern? a. hollow cone nozzle pattern b. solid cone nozzle pattern c. hollow fan nozzle pattern d fan nozzle pattern 26 58. Operation with the highest manual labor requirement for lowland rice: a. plowing with carabao b. hand transplanting c. weeding with push-type weeder d. manual harvesting 59. Principle used in creating hydraulic energy in a lever-operated knapsack sprayer is: a. adding air to a container with fixed volume of liquid b. adding liquid to a container with a fixed volume of air c. adding liquid to a container with an existing volume of liquid d. adding air to a container with an existing volume of air 60. If mechanical work is done at a rate of 1 ft-lb/sec, what is its equivalent in watts? a. 43.7 b. 746 c. 0.74 d. 1.356 61. A water stream had the following data: average width = 12 ft average depth = 2 ft; velocity per minute = 15 head = 4 ft. What is the theoretical power available from the stream? a. 2.72 b. 1.41 c. 207.31 d. 414.6 62. A multi-sail type windmill for pumping water has a diameter of 6 ft and the wind velocity is 10 mph. Estimate the actual power of this windmill. P= 1/2 p x A x V3 DENSITY = 1.27 KG/CU. M a. 0.06 b. 0.77 c. 5.45 d. 2.42 63. A 1,000 lb horse working continuously for several hours and walking at a rate of 2 ½ mph can develop how much power? 1000 LB/ 10 1 FT-LB/S = 1.356 W a. 1.33 b. 1.0 c. 0.67 d. 10 64. It is a self-propelled machine having a single axle designed primarily to pull and propel trailed or mounted agricultural implement and machinery. a. Walking-type tractor b. Pedestrian tractor c. Hand tractor d. All of the above 65. Warranty period for hand tractor from the purchase of the machine. 27  a. 4 months b. 6 months c. 12 months d. All of the above 66. A metal sheet with gauge number equal to 14 means___. a. 14-mm thick b. 14 pieces of metals sheet in a stock c. 14 pieces in one-inch thickness d. None of the above 67. The required water temperature in testing pump. – - d. None of the above 68. The criteria used in evaluating the performance of a machine. a. Reliability of machine b. Environment and safety c. Cost of operation d. All of the above 69. The development of a desirable soil structure for a seedbed does not include: a. higher water infiltration rate b. increased water surface runoff c. greater water holding capacity d. promotion of root penetration 70. Soil cut, lifted, inverted and thrown to one side of the blow bottom is termed: a. furrow b. furrowslice c. backfurrow d. Deadfurrow 71. Bend sideward of the point of the share to make the plow cut the proper width is: a. vertical clearance b. horizontal suction c. disc angle d. tilt angle 72. The angle the disc of a disc plow makes with the direction of travel to make it cut the proper width and allow it to rotate when moving forward is: a. 15 – 25 degrees b. 42 – 45 degrees c. 55 – 60 degrees d. 30 – 36 degrees 28  SWEff 73. In the equation C = , C is capacity expresses in: 10 a. m2/h b. m2/day c. ha/h d. ha/day 74. Floating power tillers are used in: a. 2-wheel tractor for wetland op. b. 2-wheel tractor for dryland op. c. 4-wheel tractor for wetland op. d. 4-wheel tractor for wetland op 75. The mechanical function of the planter does not include: a. sort the seeds b. meter the seeds c. deposit the seeds d. cover the seeds 76. The horizontal seed plate is used for: a. row-crop drill planter b. hill-drop planter c. solid drill planter d. broadcaster 77. Method of pest control not considered engineering control is: a. chemical control b. biological control c. mechanical control d. a and b 78. Sprayers are used primarily for the application of : a. herbicides b. insecticides c. fungicides d. pesticides 79. Which of the following belong to the group of variable displacement pump? a. centrifugal pump b. mixed flow pump c. air lift pump d. all of the above QxH 80. In the equation for horsepower, Hp = , Eff is: 3960xEff a. efficiency of pump b. efficiency of transmission c. efficiency of prime mover d. efficiency of the system 81. The direct type of power transmission system has: (code 52) 29  a. 90% Eff b. 95% Eff c. 98% Eff d. 100% Eff 82. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine the field efficiency in going the longer field direction: a. 77% b. 80% c. 83% d. 86% 83. Select two consecutive farm operations which when done mechanically can increase cropping intensity: a. planting – spraying b. irrigation – weeding c. harvesting – plowing d. harvesting – threshing 84. 1 pk is equal to ____________ watts 1 PK = 0.9862 HP a. 735.49 b. 740.12 c. 760.00 d. None of the above 85. A 5-m self-propelled combine makes an average stop of 4 min every time its 2-ton grain tank is to be unloaded. Gross yield of the 20-ha field is 42 tons. The operating speed is 4.8 kph. The time for turning on the headland at the ends of the 500-m field is 15 seconds. Find the field efficiency. a. 78% b. 83% c. 87% d. 90% 86. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass.Determine actual field capacity when tilling is done along the shorter field direction. a. 0.23 ha/hr b. 0.25 ha/hr c. 0.27 ha/hr d. 0.29 ha/hr 87. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine the field efficiency in going the shorter field direction: a. 77% 30  b. 80% c. 83% d. 86% 88. The gasoline engine is characterized as a. low first cost – high operating cost b. low first cost – low operating cost c. high first cost – high operating cost d. high first cost – low operating cost 89. Using the specifications of the transmission system of the metering devise (horizontal seed plate) of the two-row corn planter, determine the expected hill spacing. Row spacing = 75 cm, groundwheel diameter = 60 cm, no. of cells of seedplate = 20, T1 = 6t, T2 = 18t, T3 = 10t and T4 = 25t. a. 0.62 m b. 0.81 m c. 0.71m d. 0.92 m 90. The three-phase electric motor is characterized as. a. low first cost – high operating cost b. low first cost – low operating cost c. high first cost – high operating cost d. high first cost – low operating cost 91. Indicates the maximum load that can be safely carried by an electric motor under continuous operation: a. duty rating b. service factor c. hp rating d. current rating 92. The piston goes up and the two valves remain closed is termed: a. intake b. compression c. power d. exhaust 93. Type of transmission system where the speed ratio depends on the teeth ratio of the two members: a. gears b. chain and sprocket c. belt and pulley d. a and b 94. Determine the linear speed (kph) of a 2-wheel tractor given the following specifications: 1st reduction 2nd reduction 3rd reduction Groundwheel N1 = 2,400 rpm D1 = 10 cm T3 = 15t T5 = 20t GW diam. = 40 cm D2 = 30 cm T4 = 60 t T6 = 80t 31  a. 3.25 kph b. 3.75 kph c. 4.25 kph d. 4.75 kph 95. What is the wind power of a windpump having 5 meter diameter rotor at a wind speed of 4 m/sec? a. 733.6 watts b. 753.6 watts c. 713.6 watts d. 783.6 watts 96. In a compression-ignition engine, the fuel is introduced into the cylinder at the: a. start of intake b. start of compression c. end of intake d. end of compression 97. A valve operates: a. once per cycle b. twice per cycle c. 3X per cycle d. 4X per cycle 98. The thermal efficiency range for internal combustion engines is: a. 25 – 36% b. 36 – 50% c. 50 – 75% d. 75 – 90% 99. Type of power transmission system where clutch action is possible: a. direct coupling b. chain and sprocket c. belt and pulley d. gears 100. The gearbox placed on first gear will develop: a. high torque - high speed b. low torque – low speed c. high torque – low speed d. low torque – high speed 32  MECHANIZATION, POWER, MACHINERY & EQUIPMENT & ALLIED SUBJECT (C) 1. What is the wheel axle power of a four-wheel tractor whose engine power is equal to 150 Hp. The mechanical efficiency is 85%. a. 117.5 hp b. 127.5 hp c. 137.5 hp d. 157.5 hp 2. If an electric motor rated at 220 volts and 4.8 amperes is converted to 110 volts, then its rated current will be: a. 2.4 A b. 4.8 A c. 7.2 A d. 9.6 A 3. Energy conversion efficiency (percent) of electric motors is: a. 25 – 30 b. 30 – 36 c. 36 – 50 d. 50 – 90 4. Calculate the maximum starting current for a ½-hp, 220-volt electric motor with an H motor code (6.3 – 7.1 KVA/Hp). a. 14 A b. 15 A c. 16 A d. 17 A 5. If the amount of heat used in removing moisture from the grains in a continuous-flow dyer is 3000 kJ/hr, what is the heat utilization efficiency if the burner uses 6000 kJ/hr of fuel? a. 20% b. 40% c. 39% d. 50% 6. Cleaning units for rice husk gasifier to remove gaseous pollutant and solid particles while cooling the gas at the same time. a. Cyclone separator b. Fabric filter c. Scrubber d. All of the above 33 7. Seed produced by the Seed Production and Health Division form UP and certified 100% pure by the Seed Quality Control Services of the Bureau of Plant Industry. a. Certified Seeds b. Registered Seeds c. Foundation Seeds d. Breeder Seeds 8. 1 cv is equal to _________ watts 1 HP = 1.01 CV (CHEVAL VAPEUR) a. 735.50 b. 740.12 c. 760.00 d. None of the above 9. If you invest P50,000 today at 9% interest, how much time is required for the investment to be worth P125,000? a. 9 years b. 10 years c. 11 years d. 12 years 10. It is the percentage ratio of the time a machine is effectively operating to the total time the machine is committed to the operation. a. Operating time efficiency b. Time efficiency c. Effective time efficiency d. All of the above 11. Materials used to securely join separate parts of an object or structure are called a. binders b. fasteners c. holders d. clippers 12. Determine the time in hours to plow a 3-ha field using a 15-cm animal- drawn plow at a speed of 4 kph and efficiency of 75% a. 56 hrs b. 66 hrs c. 76 hrs d. 86 hrs 13. Determine the no. of days (8hrs/day) to plow a 10-ha field using a 3- bottom moldboard plow drawn by a 4-wheel tractor at a speed of 5 kph and filed efficiency of 76%. Width of cut of one bottom is 33 cm. a. 2.75 days b. 3.0 days c. 3.3 days d. 3.6 days 34 14. Planter designed to plant seeds in rows and in hills is called a. row-crop drill planter b. hill-drop planter c. solid drill planter d. broadcaster 15. The most recently developed system of harvesting and threshing of rice is: a. mechanical harvesting & threshing b. combining c. stripping d. all of the above 16. Which of the following agencies does not belong to the Department of Agriculture? a. BPRE b. BPI c. AMMDA d. RAEG 17. Number series assigned to standards on agricultural production machinery: a.01 - 99 b.101 - 199 c.201 - 299 d.301 – 399 18. Which of the following statement is true? a. The velocity of the knife of a reaper is faster than its forward velocity. b. The velocity of the knife of a reaper is slower than its forward velocity. c. The velocity of the knife of a reaper is the same with the forward velocity. d. None of the above 19. The difference between a stripper and a reaper is that __________________. a. the stripper cuts the panicle during harvesting b. the reaper detach the grain during harvesting c. the stripper detach the grains while the reaper cuts the panicle during harvesting d. None of the above 20. Heavy-duty type power tiller basically consists of _______ axles? a. single b. double c. triple d. None of the above 21. Twelve man-days is equivalent to: a. one man working for 12 hrs 35  b. three men working for three days c. six men working for 2 hrs d. four men working for 3 days 22. An engine valve arrangement wherein the intake and exhaust valves are located on one side of the cylinder block. a. I - head arrangement b. L- head arrangement c. X- head arrangement d. None of the above 23. Hydraulic control level of a tractor are usually located at the ____________. a. right side of the operator seat b. left side of the operator seat c. front of the operator seat d. None of the above 24. Drawbar types: a. Fixed drawbar b. Swinging drawbar c. Link drawbar d. All of the above 25. Acceptable level wheel slip for two-wheel drive tractor on a tilled or soft soil. a. 7 - 11% b. 10 - 15% c. 16 - 20% d. None of the above 26. The power required in driving power harrows, rotary tiller, and other related equipment. a. Brake horsepower b. Drawbar horsepower c. Power takeoff horsepower d. All of the above 27. Instrument for measuring furnace temperature. a. Glass bulb thermometer b. Dial type bimetallic thermometer c. Thermocouple wire thermometer d. All of the above 28. The application rate of a certain chemical is recommended at 4 kg/ha. The calibration test of a 16-liter knapsack sprayer is as follows: Nozzle discharge = 1.2 liters/min, swath = 1.5 m and walking speed = 20 m/min. Determine the amount of chemical to mix with water per loading: a. 102 gms/load 36  b. 160 gms/load c. 200 gms/load d. 240 gms/load 29. Determine the size of the diesel engine to be used for a 4 inches X 4 inches centrifugal pump. Pump discharge is 200gpm. Total head is 24 ft. Pump efficiency is 55%. V-belt efficiency is 95%. And air-cooled diesel engine delivery rating is 70%. a. 1.6 hp b. 2.4 hp b. 3.3 hp d. 4.7 hp 30. Which of the following does not belong to the group of positive displacement pumps? a. lift pump b. force pump c. rotary pump d. propeller pump 31. The conventional system of harvesting and threshing of rice in the Philippines is: a. manual harvesting and threshing b. Manual harvesting and mechanical threshing c. mechanical harvesting and threshing d. combining 32. Amount of power that the manufacturer specified for an engine. a. Indicated horsepower b. Brake horsepower c. Rated horsepower d. Belt horsepower 33. A device that provides ignition to a gasoline engine. a. Flywheel b. Fuel injector c. Carburetor d. Spark plug 34. Device that connects and disconnects power input to the power output. a. Clutch b. Gear c. Pulley d. None of the above 35. Compression pressure for small gasoline engine. a. 40 to 70 psi b. 75 to 125 psi c. 150 to 410 psi d. None of the above 36. The Japanese combine is characterized as: 37  a. low power & hold-on feeding b. low power & throw-in feeding c. high power & hold-on feeding d. high power & throw-in feeding 37. This mixture of 90% gasoline and 10% alcohol is used as a fuel for spark ignition engine. a. methyl ester b. ethyl ester c. gasohol d. normal heptane 38. This pump uses the energy of a downward-flowing stream of water to lift a portion of the water to a higher level. a. centrifugal pump b. waterwheel c. hydraulic ram d. water turbine 39. It is a gasoline fuel additive which helps improves the anti-knocking characteristics of fuels but which has been recently discovered to be dangerous to living beings. a. methanol b. ethanol c. tetraethyl lead d. gasohol 40. A secondary tillage operation which pulverizes, smoothens, and packs the soil during seedbed preparation and also controls weeds. a. Harrowing b. Listing c. Chiselling d. None of the above 41. The power take-off rpm of a lawn mower and garden ride-on tractors. a. 1000 rpm b. 540 rpm c. 2000 rpm d. None of the above 42. Power machines that cut sheet metals, angle bars, round bars, or square bars by shear action of two moveable blades that are made to move by maximized leverage. a. Sheet metal circular cutter b. metal cutting power saw c. Square shearing cutter d. Power shears 43. In a 200 ha corn project, the fields have to be tilled in 30 days. What is the width of the heavy offset disk harrow should be selected if the tractor to 38 be used operates at 3.125 mph. Assume a 75% field efficiency and an 8 hour working day: a. 2.22 b. 4.33 c. 10.11 d. 8.66 44. A 3-ha field was plowed using a 15-cm wide animal-drawn plow at 4 kph and field efficiency of 75%. The draft required to pull the plow is 60 kg. Find the distance traveled to plow the field. a. 66.67 km b. 133.33 c. 200 km d. 266.67 km 45. Bend downward of the point of the share to make the plow penetrate the soil to the proper depth is: a. tilt angle b. disc angle c. horizontal suction d. vertical clearance 46. Which of the following operation is not done by a stripper? a. cutting of standing crop b. stripping c. cleaning of grains d. conveying of grains to the tank 47. Twelve man-days is equivalent to the output of: a. 3 men X 4 days b. 6 men X 2 days c. 12 men X 1 day d. all of the above 48. When heat alone is used to melt and flow metal together, the process is known as _______. a. Soldering b. Pressure welding c. Fusion Welding d. None of the above 49. Component parts of a seeder that is used to calibrate the seed metering device. a. Furrow wheel b. Ground wheel c. Support wheel d. All of the above 50. A central part of a plow where the share, moldboard, and landside are attached. 39  a. Frame b. Frog c. Shank d. None of the above 51. Engine cooling method. a. air cooled b. water cooled c. air and water cooled d. All of the above 52. Seed produced from breeder seeds and distributed to all members of the Seed Net and selected seed producers in every province for further multiplication. a. Certified Seeds b. Registered Seeds c. Foundation Seeds d. Breeder Seeds 53. It is the useful service life of the machine before it becomes unprofitable for its original purpose due to obsolescence or wear. a. Machine economic life b. Machine life span c. Machine service life d. None of the above 54. Angle in the soil surface plane perpendicular to the direction of travel between the tool axis and the line which is perpendicular to the direction of travel. a. Tilt angle b. Side angle c. Lift angle d. None of the above 55. Seed produced from Foundation Seed and being distributed to all accredited seed producers for mass production. a. Certified Seeds b. Registered Seeds c. Foundation Seeds d. Breeder Seeds 56. Seed produced from the Registered Seed by accredited seed producers and distributed to farmers for commercial production. a. Certified Seeds b. Registered Seeds c. Foundation Seeds d. Breeder Seeds 57. Machine operation in which there are two or more machines performing their own respective operation simultaneously. 40  a. Individual operation b. Parallel operation c. Series operation d. None of the above 58. Machine operation in which there are two or more machines performing their own respective operation in sequence. a. Individual operation b. Parallel operation c. Series operation d. None of the above 59. Machine operation in which one or more similar machines are operated as one unit. a. Individual operation b. Parallel operation c. Series operation d. None of the above 60. A type of gas producer which has the ability to gasify wet fuel. a. Updraft b. Down draft c. Cross draft d. Fluidized bed 61. The gasification rate of rice hull ranged from a. 90-105 kg/m2-hr b. 110-210 kg/m2-hr c. 210-240 kg/m2-hr d. None of the above 62. Rice hull gasifier efficiency normally ranged from a. 50-70 % b. 70-80 % c. 80-90 % d. None of the above 63. The caloric value of fuel is a. The amount of heat contained by the fuel per unit weight b. The heat needed to burn a certain weight of fuel c. The weight of fuel to be heated d. None of the above 64. A type of rice husk furnace that burns the fuel while it is being spread in a circular pattern inside the combustion chamber. a. Step grate furnace b. Suspended air furnace c. Cyclone furnace d. All of the above 41 65. The thermal efficiency of the furnace is the ratio of a. The amount of fuel used to the amount of heat generated during combustion b. The amount of heat generated during combustion to the amount of fuel used c. The amount of heat delivered to the amount of heat available in the fuel used d. None of the above 66. The burning temperature of most agricultural waste a. 100-200C b. 300-400 C c. 500-600 C d. None of the above 67. A high-cetane fueled engine uses a. Diesel as fuel and is difficult to start engine at lower temperature b. Diesel as fuel and is easy to start at higher temperature c. Gasoline fuel and is easy to start at lower temperature d. None of the above 68. High viscosity engine oil is desirable to use because a. Its viscosity changes easily with a change in temperature b. Its viscosity does not change easily with the change in temperature c. Its viscosity changes even without a change in temperature d. None of the above 69. Engine oil having high flash and fire point indicates. a. High boiling point b. High evaporation rate c. High heating value d. All of the above 70. In order to increase the resistance of engine oil, the formation of certain acidic product that may cause corrosion of certain type of bearing the recommended additive to use is. a. Anticorrosive b. Antioxidants c. Dispersants d. All of the above 71. An additive purposely to provide a protective film on bearing surfaces thus preventing any acid to corrode metal parts. a. Anticorrosive b. Antioxidants c. Dispersants d. All of the above 42 72. Additives to cause carbon particles in the engine to remain in suspension in oil. a. Anticorrosive b. Antioxidants c. Dispersants d. All of the above 73. The burning of portion of fuel in the combustion chamber of an engine at a rate faster than the desired. a. Knocking b. Detonation c. Misfiring d. All of the above 74. A device used to measure the quantity of oil in a crankcase. a. Dipstick b. Oil gauge c. Oil stick d. None of the above 75. A device that provides a rich mixture of fuel during high load and lean mixture during under load. a. Carburetor b. Economizer c. Fuel regulator d. All of the above 76. The lubrication system of an engine is basically a. To reduce wear and tear of an engine b. To act as complement of the cooling system c. To act seal between the piston and cylinder wall d. All of the above 77. When a diesel engine knocks, the trouble is a. The diesel fuel ignition timing is late b. Incorrect type of spark plug c. Incorrect engine lubrication and wrong grade oil d. All of the above 78. When a gasoline engine knocks, the problem is a. The spark timing is too far advance b. Incorrect type of spark plug c. Incorrect type of fuel d. All of the above 79. If the engine timing is advance a. The spark plug ignites earlier than the fuel while piston is completing the compression stroke b. The spark plug ignites earlier than the fuel while the piston is at the intake stroke c. The spark ignites earlier than the fuel while moving downward immediately after the power stroke 43  d. All of the above 80. It is the act of checking, testing, measuring, repairing and adjusting the engine in order to bring it to the peak efficiency. a. Trouble shooting b. Tune-up c. Timing adjustment d. All of the above 81. The coefficient of traction for wheel-type tractor is highest for a. Concrete road b. Fine sand c. Sandy loam soil d. All of the above 82. The rapid explosion of mixture of fuel and air within the cylinder when ignited by spark plug is in _____. a. Constant volume combustion b. Constant temperature combustion c. Constant pressure combustion d. All of the above 83. The relatively slow burning as the fuel is injected into a highly compressed heated air is. a. Constant volume combustion b. Constant temperature combustion c. Constant pressure combustion d. All of the above 84. The gross heating value of diesel is a. Higher than gasoline b. Higher than kerosene c. Higher than ethanol d. All of the above 85. Which of the following is true in the operating gasifier for internal combustion engine? a. Only 50 to 70 % of the diesel oil can be replaced by gas producer. b. Gasoline and diesel can be fueled with gas producer. c. The power output of gasoline engine at arbitrary rpm will increase by 30 to 50 % when fueled with producer gas. d. All of the above 86. An injection system used in small stationary diesel engine consisting essentially of a high pressure pump and an injection nozzle. a. Air injection system b. Solid injection system c. Automized injection system d. None of the above 87. An engine running at a speed of 2000 rpm is classified as 44  a. Low speed engine b. Medium speed engine c. High speed engine d. None of the above 88. A primary tillage operation which manipulates the soil to a greater depth than 300 mm. a. Reservoir tillage b. Deep tillage c. Ridge tillage d. None of the above 89. A secondary-tillage implements which stirs the soil using multiple number of disk blade arranged on a gang. a. Spike tooth harrow b. Disk harrow c. Two of the above d. None of the above 90. A trailing harrow that is hitched too high to the drawbar will... a. Have too deep penetration b. Have right penetration c. Have too shallow penetration d. None of the above 91. A kind of chemical used for spraying which form finely divided solid particles when mixed with water. a. Emulsion b. Suspension c. Solution d. All of the above 92. Growing of more than one crop on the same land in one year a. Mixed crop b. Multiple cropping c. Inter-cropping d. None of the above 93. Growing of two or more crops simultaneously and intermingled with no row arrangement. a. Mixed cropping b. Inter-cropping c. Multiple cropping d. None of the above 94. Growing of two or more crops in alternate rows. a. Inter-planting b. Inter-cropping c. Inter-culture d. All of the above 45 95. It is a practice of planting short-term annual crop with long-term annual or biennial crops. a. Inter-planting b. Inter-cropping c. Inter-culture d. All of the above 96. It is the cultivation of one crop underneath a perennial crop. a. Inter-planting b. Inter-cropping c. Inter-culture d. All of the above 97. Application of chemical to a small restricted area, usually to control the spread of pest. a. Spot treatment b. Space application c. Direct application d. All of the above 98. Dispersion of liquid or dry particles in air in such a manner that target pest is exposed to chemical. a. Spot treatment b. Space treatment c. Direct application d. All of the above 99. Application of chemical to the steam, fruit, leaves, needles, or blades of the plant. a. Direct application b. Foliar application c. Space application d. All of the above 100. Application of chemical to a specific area such as row, bed, or base of the plant. a. Direct application b. Spot treatment c. Space application d. None of the above 46  MECHANIZATION, POWER, MACHINERY & EQUIPMENT & ALLIED SUBJECT (D) 1. Application of chemical over entire area to be treated. a. Basal application b. Band application c. Broadcast application d. None of the above 2. Calculate the drawbar hp required to pull a plow with 3X14-in bottoms at the rate of 3.25 mph if the specific draft is 8 psi and depth of cut is 7 inches. a. 6.8 hp b. 13.6 hp c. 20 hp d. 27.2 hp 3. A field measuring 45 m X 90 m is to be prepared using a 1-m upland power tiller at a speed of 3 kph. Assume a 10% overlap between passings and 9 seconds turnaround time at the end of each pass. Determine actual field capacity when tilling is done along the longer field direction. a. 0.23 ha/hr b. 0.25 ha/hr c. 0.27 ha/hr d. 0.29 ha/hr 4. A sprayer containing 100 liters of mixture operates at a nozzle discharge of 0.2 liters per minute per nozzle. If the sprayer boom consists of 6 nozzles, at what time does the sprayer mixture be changed? a. 1.39 hours b. 2.39 hours c. 3.39 hours d. 4.39 hours 5. A tractor with a 9-in pulley is belted to a prony brake having a 24-in pulley. If the tractor engine pulley speed is 950 rpm, the brake arm is 54 in, and the net load is 60 lb., what is the hp developed? P= FN/1340 F= KG a. 25.2 N= RPM b. 18.3 P= HP c. 34.6 d. 52.4 6. Compute the number of plants required for a 2-hectare corn farm with the following seed spacing: Plant spacing, 0.25 m and row spacing, 0.45 m. a. 180, 777.8 plants or hills 47  b. 177, 777.8 plants or hills c. 166, 777.8 plants or hills d. 111, 777.8 plants or hills 7. A drawbar dynamometer shows that the average pull required for a certain machine is 12.5 kilo nt. If the tractor travels 25 m in 3.5 min, what is the power developed? a. 1.5 hp b. 2.5 kilowatt c. 6.667 hp d. 0.567 kw 8. In a four-stroke cycle engine, it is the event during which the piston is moving upward and the two valves are close. a. power b. intake c. compression d. exhaust 9. During this event, fresh supply of fuel enters the cylinder as the piston moves downward and the intake valve opens. a. compression b. intake c. exhaust d. power 10. The engine referred to in question no. 38 above is a: a. 2-stroke cycle diesel engine b. 4-stroke cycle spark ignition engine c. 2-stroke cycle spark ignition engine d. 4-stroke cycle diesel engine 11. A 1000 kg carabao traveling at v kph is pulling a moldboard plow whose width of cut is w centimeter at a depth of d inches. If the unit draft of soil is s nt/cm2, the total horizontal pull (in nt) exerted by the carabao is: a. 5.85 swd b. 7.83 swd c. 2.54 swd d. 3.85 swd 12. A 30-disk double-offset-disk harrow is travelling at a speed of 10 kph. If the disk diameter is 40 cm spaced at 30cm, what is the cutting width of the harrow? What is its theoretical field capacity? W = (0.95*N*S)+(0.6*D) S= M a. 5.6 ha/hr D= M b. 9.6 ha/hr c. 2.6 ha/hr d. 8.6 ha/hr 13. A 4-cylinder, 120 mm × 120 mm engine turns at 2000 rpm. What is the total engine displacement? 48  a. 500π cm3 b. 250π cm3 c. 1000π cm3 d. none of the above 14. It refers to ratio of the kinetic energy of air that a windrotor can convert into mechanical energy over the theoretical maximum available from the wind. a. Power coefficient b. Torque coefficient c. Betz coefficient d. Speed coefficient 15. A constant pressure cycle a. Gasoline engine b. Diesel engine c. Steam engine d. None of the above 16. Determine the theoretical power available from a stream using the following data: average width = 6 meters; average depth = 16 inches; speed = 10 ft/min; height of drop = 1.5 meter. a. 1.82hp b. 1.63 hp c. 1.82 kW d. 2.45 kW 17. The electrolyte solution of the lead-acid battery consists of 2 parts of sulphuric acid and 5 parts water. The concentrated acid has a specific gravity of: a. 1.500 b. 2.000 c. 1.750 d. none of the above 18. In an ideal Diesel engine, the combustion of fuel occurs at : a. constant pressure b. constant temperature c. constant volume d. constant enthalpy 19. In an ideal Otto engine, the combustion of fuel occurs at : a. constant pressure b. constant temperature c. constant volume d. constant enthalpy 20. There are 1000 heads of chicken in a poultry farm. Estimate the kilos of dung that can be produced by the chicken within 1 month. a. 2,050 kg 49  b. 2,250 kg c. 2,950 kg d. 2,850 kg 21. Which of the following statements is incorrect: The higher the pressure a. the larger the droplet size b. the higher flow rate c. the wider the spray angle d. all of the above 22. How much water is produced by an engine each hour if it burns 25 liters of premium gasoline per hour? a. 20.45 liters b. 25.93 liters c. 30.56 liters d. 32.55 liters 23. A prony brake test of an engine shows that the crankshaft rotates at 1000 rpm. The brake arm length is 60 inches and the net load on the scales is 50 lb. What is the power developed? a. 48 kW b. 35 kW c. 42 hp d. 26,180 ft-lb/min 24. A 1.2-m wide floating tiller is used for rotary tilling/puddling a 24-m X 42-m wetland paddy field. The average speed of travel is 3 kph and turning at the headlands takes 10 seconds. What is the field efficiency if the field is worked along its length? a. 71 % b. 74 % c. 79 % d. 84 % 25. Application of chemical to the base of a tree around the trunk or by injection into slasher or cuts. a. Basal application b. Broadcast application c. Band application d. None of the above 26. The traditional system of harvesting and threshing of rice is: a. manual harvesting and threshing b. manual harvesting and mechanical threshing c. mechanical harvesting and threshing d. combining 27. Among the factors affecting the choice of harvesting and threshing system, which one is the major factor? a. kind of crop 50  b. timeliness of operation c. topography d. farm size 28. The threshing action most commonly employed by a mechanical thresher for rice is: a. rubbing action b. impact action c. stripping action d. all of the above 29. A paddy seeder was imported from Timbuktu with the following specifications: Groundwheel diameter = 47.24 inches Fixed row spacing = 250 mm Hopper capacity = 20 kg. Designed working speed = 3 miles/hour Engr. Drunken is to calibrate the seeder for paddy sowing. What groundwheel rpm must he set to simulate the designed working speed? a. 21.34 b. 26.58 c. 36.21 d. 10.21 30. Remote control hydraulic cylinders with internal diameters of 2.5 inches and 3.5 inches with 1000 lbs/in2 maximum pressure are available for tractors. What is the maximum force that can be developed by the 3.5-inch cylindrers? a. 9.7 lbs b. 9,620 lbs c. 9,620 kg d. 9.7 kg 31. A 4-cylinder, 120 mm × 120 mm engine turns at 2000 rpm. What is the total engine displacement? a. 500π cm3 b. 250π cm3 c. 750π cm3 d. none of the above 32. It refers to ratio of the kinetic energy of air that a windrotor can convert into mechanical energy over the theoretical maximum available from the wind. a. Power coefficient b. Torque coefficient c. Betz coefficient d. Speed coefficient 33. Determine the theoretical power available from a stream using the following data: average width= 6 meters; average depth = 16 inches; speed = 10 ft/min; height of drop = 1.5 meter. a. 1.82hp b. 1.63 hp c. 1.82 kW 51  d. 2.45 kW 34. This rating is given to diesel fuels for their ability to burn without detonating as compared with the performance of reference fuels. a. octane rating b. cetane rating c. heptane rating d. alcohol rating 35. The electrolyte solution of the lead-acid battery consists of 2 parts of sulphuric acid and 5 parts water. The concentrated acid has a specific gravity of: a. 1.500 b. 2.000 c. 1.750 d. 1.835 36. In an ideal Diesel engine, the combustion of fuel occurs at: a. constant pressure b. constant temperature c. constant volume d. constant enthalpy 37. The acronym PAES means: a. Philippine Agricultural Engineering Society b. Professional Agricultural Engineering Society c. Philippine Agricultural Engineering Standards d. Professional Agricultural Engineering Standards 38. A 4-ha field was plowed using a three-bottom 12-inch tractor-mounted moldboard plow. It took 11 hours to complete the operation at a tractor speed of 5 kph. Find the field efficiency. a. 75% b. 80% c. 85% d. 90% 39. The calibration of the 9X7 (9 rows X 7 inches row spacing) grain drill is shown below. Row spacing to be adjusted to 14 inches. Groundwheel diameter is 1.22 m. Discharge (gm) Seeding (9 rows for 10 revolutions of Adjustment groundwheel) ¼ Open 140 ½ Open 460 ¾ Open 740 Full Open 1,100 What is the seeding rate at ¼ open seeding adjustment? a. 5 kg/ha b. 11 kg/ha 52  c. 8 kg/ha d. 20 kg/ha 40. The following are methods of reducing risks in agriculture, except: a. Insurance b. flexibility c. future contract d. aggregation 41. A 4-m combine traveling at 5 kph can empty its 1.5-ton grain tank in 2 minutes. When unloading on-the-go, it has an 86% field efficiency. Field yield is 3.5 tons/ha. What would be the field efficiency if the combine stopped to load? a. 70% b. 75% c. 80% d. 85% 42. Application of chemical in parallel strips leaving the area between strips free of chemicals. a. Basal application b. Broadcast application c. Band application d. None of the above 43. Solid blocks or masses that are cut, sheared or broken loose by tillage tool. a. Furrow slice b. Clod c. Loose soil d. None of the above 44. It is a change in the value of a machine. a. Cost reduction b. Depreciation c. Loss of value d. None of the above 45. Actual rate performance of machine on land or crop processed in a given time based upon total field time. a. Theoretical field capacity b. Effective field capacity c. Field efficiency d. All of the above 46. The rate of performance obtained if a machine performs its function 100 % of the time of a given operating speed using 100 % of its theoretical width. a. Theoretical field capacity b. Effective field capacity c. Field capacity d. None of the above 53 47. The amount paid for hiring equipment and operating services to perform a certain task. a. Custom cost b. Operating cost c. Variable cost d. None of the above 48. The ratio of engine power used in performing an operation to engine power available. a. Field load factor b. Engine efficiency c. Engine performance ratio d. All of the above 49. The amount of any material applied per unit treated by a sprayer. a. Through put rate b. Application capacity c. Application rate d. All of the above 50. How much oxygen does air have? a. 23.2% by volume b. 23.2% by weight c. 15.3% by weight d. 15.3% by volume 51. For complete combustion of gasoline, how much air is needed? a. 11.1 kg/kg of fuel b. 12.5 kg/kg of fuel c. 15.1 kg/kg of fuel d. 8.2 kg/kg of fuel 52. The bore of an engine is 8 cm and the stroke is 11 cm. Find the piston displacement. a. 55.23 cm3 b. 155.35 cm3 c. 789.30 cm3 d. 552.92 cm3 53. A prony brake test of a 4-stroke cycle 7.5-cm × 10-cm engine was conducted. The lever arm was 75 cm at a net force of 60 N and speed of 1000 rpm. Determine the bhp of the engine. N-m/s = W a. 4.7 b. 60 c. 7.6 d. 6.3 54 54. It is a special shaft that extends to the rear of the tractor and is designed to provide power to integral mounted or trailing implements such as mowers, balers, and Rotavator. a. PTO b. drawbar c. differential d. hitch 55. It is an instrument used for testing specific gravity of a liquid. a. hydrometer b. hygrometer c. viscometer d. density meter 56. It is a special arrangement of gears so constructed and located in the transmission system of an automotive machine that it will permit one driving member to rotate slower or faster than the other and at the same time propel its share of the load. a. gear box b. automatic transmission c. differential d. PTO 57. It refers to the driving force developed by a wheel or any other traction device. a. rolling resistance b. traction c. inertia d. pull 58. It is engine part whose primary function is to maintain uniform engine speed by absorbing some energy during the power strokes and providing power during the idle strokes. a. governor b. accelerator c. flywheel d. crankshaft 59. It is the theoretical maximum percentage of the kinetic energy of air which a windrotor can convert into mechanical energy. a. 82.5% b. 50.5% c. 59.3% d. 10.0% 60. In a spark ignition engine, fresh supply of fuel and air mixture enters the cylinder as the piston moves downward and the intake valve opens during this event. a. exhaust b. intake c. power d. compression 55 61. In order to properly stop the forward motion of the 4-wheel tractor, the operator has to step on the: a. brake pedal b. clutch pedal c. brake and clutch pedals d. accelerator 62. What is the prevailing ad valorem tax in the Philippines? a. 5 percent b. 2 percent c. 10 percent d. 20 percent 63. What is the process by which a farm manager looks ahead to the future and contemplates alternative courses of action for the farm? a. Budgeting b. Farm Economics c. Farm Planning d. Efficiency of Production 64. These are the economic resources owned by a business which are expected to benefit future operations: a. inventories b. assets c. liabilities d. none of the above 65. Which of the following is not a good reason for using Farm Plans? a. For review and analysis of objectives. b. Serve as a central facilitating aid. c. Provide a basis for evaluation and improvement. d. None of the above 66. The following are all processes of proper management, except ________. a. Planning b. Leading c. Controlling d. Procrastinating 67. Which of the following statements is not a good labor management practice. a. Planning a labor calendar. b. Providing social life and giving out bonuses and profit sharing, to enhance productivity. c. Doing everything there is to do in order to save the rainy days for resting. d. Developing initiative, goodwill, cooperation and respect. 68. Which among the following is/are not functions of farm management 56  a. Keeping records and accounts. b. Controlling and directing the various resources. c. Managing labor, land and capital. d. None of the above. 69. The classes of risks in agriculture results from: a. Human factors b. Statements b, and c c. Liquidity d. Natural factors 70. This involves planning the procurement and utilization of funds and controlling the financial operations to insure effective utilization of funds. a. Farm Budget b. Marketing Management c. Production Management d. Financial Management 71. Which of the following is not a function of management? a. Controlling and directing the various resources b. Management of labor c. Methods of reducing risks in agriculture d. Farm records 72. In financial analysis, what is the ideal current ratio? a. 1:1 b. 2:1 c. 3:1 d. 2:2 73. It is the cost outlay of the firm for the wear and tear of machines, buildings and implements. a. credit b. depreciation cost c. discount rate d. none of the above 74. What is the term used for the amount of funds available for payment at any given time? a. Current assets b. Accounts receivables c. Net working capital d. Capital 75. Which of the following is not a method of valuation of inventory? a. original cost b. original cost less depreciation c. normal market value d. none of the above 57 76. What is the “book value of an asset?” a. A tax levied on an import. b. The value of an asset after subtracting depreciation c. Also called as the ‘net benefit.’ d. The exchange value of goods or services in terms of money. 77. A farmer uses a hand tractor with 20 cm moldboard plow. How many kilometers must he walk to plow one hectare? a. 45 km b. 37 km c. 57 km d. 50 km 78. If he overlaps each pass by 10%, how many kilometers more will he have to walk to plow one hectare? a. 4.70 km b. 5.56 km c. 1.98 km d. 8.03 km 79. An engine at 2000 rpm is to drive a pump to run at 1000 rpm. The engine drive pulley is 15 cm in diameter and there is a 10% belt slippage. What should be the diameter of the pulley on the pump? a. 23 cm b. 27 cm c. 24 cm d. 26 cm 80. How many hectares can be plowed in one hour by a tractor operating at 5 kph and is pulling 3 moldboard plows with a total width of cut of 160 cm at a depth of 14 cm? a. 0.80 ha/h b. 1.80 ha/h c. 2.80 ha/h d. 3.80 ha/h 81. What is the total draft in kilogram pull if there is a draft of 0.45 kg/cm2? a. 1108 kg b. 1008 kg c. 1008 kg d. 1018 kg 82. How many hectares can be plowed in 3 hours if 8% of the time is spent on headland turning? a. 2.208 ha b. 1.208 ha c. 0.208 ha d. 3.208 ha 58 83. A 2-hectare farm is to be planted by a 4-row rear mounted corn planter traveling 5km/h with a row spacing of 1 meter. The field is twice as long as its width. If 3 minutes is spent for each head land turn; How many turns will the planter make to plant the whole area? a. 21 turns b. 22 turns c. 23 turns d. 24 turns 84. How many hours are needed to plant the whole field if the plant rows run along the longer length? a. 2.2 hours b. 1.2 hours c. 2.9 hours d. 2.7 hours 85. How many percent of the total planting time in was spent in headland turning? a. 52.54% b. 54.54% c. 58.54% d. 51.54% 86. If the planter delivered an average of 12 seeds per linear meter, how many seeds are needed for the entire area including the headlands? Planting is along the longer side. a. 210,000 seeds b. 240,000 seeds c. 220,000 seeds d. 230,000 seeds 87. A sprayer is operating at 6 kph, covering 30 hectares in 6 hours. 20% of the time was spent on headland turning and tank filling. What is the effective swat boom of the sprayer? a. 10.42 meters b. 12.42 meters c. 14.42 meters d. 15.42 meters 88. If the area is increased to 40 hectares, what should be the operating speed to finish spraying in 6 hours with 20% time loss? a. 8.0 kph b. 6.0 kph c. 4.0 kph d. 2.0 kph 89. A farmer will use an 8-row grain drill for planting paddy. Its groundwheel is one meter in diameter designed for slip operation. Row spacing is adjustable. He will follow a 100-kg/ha seeding rate recommendation. If the row spacing is 25 cm, how much paddy (in grams) must the drill deliver for one revolution? 59  a. 69.8 grams b. 64.8 grams c. 62.8 grams d. 61.8 grams 90. If 1000 seeds weighs 25 grams and assuming uniform distribution, how many seeds must there be per linear meter along the row? a. 180 seeds/m b. 100 seeds/m c. 190 seeds/m d. 110 seeds/m 91. If the seed germination rate is 90%, how many rice plants will be established per square meter? a. 160 seeds will grow b. 960 seeds will grow c. 660 seeds will grow d. 360 seeds will grow 92. If the working speed is 5 km/h, how much time is needed to plant a square 2-hectare field at 20cm row spacing? a. 2.5 hours b. 3.5 hours c. 4.5 hours d. 1.5 hours 93. If the optimum pulling load of the carabao is about 35 percent of its body weight and weighs 250 kg. a. 77 kg b. 107 kg c. 97 kg d. 87 kg 94. A four-stroke-spark-ignition engine needs a magneto to operate. a. contact point b. fuel pump c. gas tank d. float valve 95. Compact tractors are four-wheel tractors with power rating below 32 hp. a. 80 Kw b. 24 Kw c. 70 Kw d. 90 Kw 96. The differential facilitates the turning of the tractor. 60  a. gear lever b. 3-pt hitch c. pto d. steering wheel 97. For high speed engines, the intake valve opens at TDC and closes after BDC. a. 54 degrees b. 50 degrees c. 44 degrees d. 40 degrees 98. Spark-ignition engines use gasoline as fuel. a. carburetor b. injection nozzle c. metering valve d. plunger 99. In a four-stroke cycle engine, compression is the event during which the piston is moving upward and the two valves are close. a. power stroke b. intake stroke c. compression stroke d. exhaust stroke 100. In a compression-ignition engine, fresh supply of fuel and air mixture enters the cylinder as the piston moves downward and the intake valve opens. a. exhaust stroke b. intake stroke c. compression stroke d. power stroke 61  MECHANIZATION , POWER, MACHINERY & EQUIPMENT & ALLIED SUBJECT (E) 1. If it is desired to reverse the four-wheel tractor to the right, the steering wheel must be turned. a. backwards b. counterclockwise c. clockwise d. forward 2. The flywheel is the part of the engine which absorbs the power from the crankshaft during the idle strokes and returns it during the power stroke. a. True b. False c. Neither d. None of the above 3. A 1000 kg carabao traveling at v kph is pulling a moldboard plow whose width of cut is w centimeter at a depth of d inches. If the soil draft.is s kg/sq.cm. What is the total pull (in lb) being exerted by the carabao? a. 5.85 swd b. 5.95 swd c. 5.59 swd d. none of the above 4. At the given velocity, how long will it take to plow a rectangular field W meters wide and L meters length. a. lw/10VW b. Lw/10vW c. lW/10Vw d. LW/10vw 5. If the weight of the carabao is increased to 1,500 kg by how many percent is the total pull exerted by the carabao increased. a. 50% a. 33.33% b. 30% c. 53.33% 6. If each succeeding pass overlaps the previous pass by 10 %, by how much longer will it take to plow the same field. a. LW / 90 vw b. LW / 9 vw c. Lw / 9 vW 62  d. Lw / 90 vW 7. A two-hectare rice field whose length is twice its width is to be harvested by a stripper combine whose average speed will be 5 kph. Field sampling of the crop showed 0.60 kg paddy per sq. meter. If the combine was able to finish the area in two hours, how wide is the swath of the combine? a. 2 m