Machine Design Elements Test 1 PDF

Part 1: Machine Design Elements-Test 1 -------------------------------------- 1. Device used to measure accurately speed: ***Answer : C*** A. Speedometer B. Dial indicator C. Tachometer D. Dial gauge 2. When the hole is smaller than the shaft, it will take pressure to...

Part 1: Machine Design Elements-Test 1 -------------------------------------- 1. Device used to measure accurately speed: ***Answer : C*** A. Speedometer B. Dial indicator C. Tachometer D. Dial gauge 2. When the hole is smaller than the shaft, it will take pressure to put the parts the parts together. The allowance is said to be negative and is termed: ***Answer D*** E. Negative tolerance F. Negative allowance G. Negative fits H. Interference of metal 3. When two elastic bodies collide, which following laws can be used to solve for the resulting velocity? ***Answer: D*** I. Dalton's law J. Avogadro K. Conservation of energy L. Conservation of momentum and conservation of energy 4. The ability of a metal to be deformed considerably without rupture is called: ***Answer: A*** M. Plasticity N. All of these O. Ductility P. Malleability. 5. Permanent deformation or strain may occur without fracture: ***Answer: C*** Q. Malleability R. Elasticity S. Ductility T. Plasticity 6. It is a science of motion that can be solved in terms of scalar or vector algebra: ***Answer: A*** U. Kinematics V. Curvilinear translation W. Projectiles X. Acceleration 7. A system force in space is in equilibrium. If equal and opposite collinear forces are added, which of the following if any is true? ***Answer: B*** Y. Equilibrium is destroyed Z. Equilibrium is maintained A. None of these is true B. An unbalanced of moment exist 8. Metal that assists lubrication or lubricant in itself: ***Answer: C*** C. Zinc D. Antimony E. Babbitt F. Lead 9. A mechanism which usually do the indexing in a machine tool: ***Answer: C*** G. Universal chuck H. Slotter I. Dividing head J. Indexing 10. It equalizes the energy exerted and the work done thus preventing excessive or sudden changes of speed: ***Answer: C*** K. Flywheel L. Balance of wheel M. All of these N. Flywheel pulley 11. The smallest are at the point of rupture of a tensile specimen divided by the original area is called: ***Answer: D*** O. Percentage elongation P. Izod test Q. Charpy test R. Percentage reduction of area 12. The product of the resultant of all forces acting on a body and the time that the resultant acts: ### Answer: C S. Angular impulse T. Angular momentum U. Linear impulse V. Linear momentum 13. Which of the following is not a structural class of steel? ***Answer: B*** W. Low carbon steel X. Tool and die steel Y. High chrome alloy steel Z. High strength low alloy steel 14. Poison's ratio is the ratio of: ***Answer: C*** A. Shear strain to compressive strain B. Elastic limit to compressive strain C. Lateral strain to longitudinal strain D. Elastic limit to proportional limit 15. All are associated with the grade of steel except: ***Answer: D*** E. SAE 43XX F. SAE 13XX G. SAE 10XX H. SAE 74XX 16. A property of material which relates the lateral strain to the longitudinal strain: ***Answer: C*** I. Stress J. Strain K. Poison's ratio L. Strength 17. The maximum stress to which a material may be subjected before failure occurs: ***Answer: B*** M. Ultimate strength N. Ultimate stress O. Endurance limit P. Tensile stress 18. Hypoid gear is a special type of gear like: ***Answer: D*** Q. Worm gear R. Spur gear S. Herringbone gear T. Bevel gear 19. Considered a maximum safe center distance of sprockets should be [ ] pitches. Very long center distance cause catenary tension in the chain. ***Answer: B*** U. 70 V. 80 W. 60 X. 50 20. Cold working of steel plates make the metal: ***Answer: C*** Y. Tougher Z. More ductile A. Harder B. More malleable 21. Recommended best cutting angle of drill for work on steel or cast iron is [ ] degrees. C. 48 D. 63 E. 59 F. 50 22. In shear pin or breaking pin design, we may use the data experienced by the link belt from 1/8 inch to 1 inch pins and the stress is [ ] ksi. ***Answer: C*** G. 40 H. 55 I. 50 J. 48 23. Deals only with the motion of bodies without reference to the forces that cause them: ### Answer: D K. Dynamics L. Kinematics M. Static N. Kinematics 24. The property that characterizes a material ability to be drawn into wire: ***Answer: A*** O. Ductility P. Thermal conductivity Q. Tensile strength R. Endurance limit 25. One of the causes of spur gear tooth breakage is the unbalanced load on one end of the tooth that results in higher stresses than when the load is evenly distributed. To minimize this problem, the face width "b" should not be greater than the thickness (or pitch ) of the tooth. In the absence of test values, the following can be a guide: ***Answer: A*** S. 2.5 Pc \< b \< 4 Pc T. 2.0 Pd \< b \< 4 Pd U. 2.5 Pd \< b \< 4Pd V. 2.0 Pc \< b \< 4 Pc 26. The three moment of equation may be used to analyze: ***Answer: B*** W. Tapered column X. Continuous beam Y. Composite beam Z. Axially end loaded beam 27. What is the common shop practice to prevent solder from running away from surface to be joined? ***Answer: A*** A. All of these B. Surrounded the work with clay C. Introduced around the work rolled wet cloth D. Put asbestos sheeting around the work 28. Non- ferrous filler metal is melted into roves or as fillet on the mother metal; the base metal is not melted. This is commonly used for joining iron based machine parts or in repair works of some materials. It is called: ***Answer: B*** E. Spot welding F. Braze welding G. Brazing H. Gas welding 29. It is advised that in rubber belts application/mounting, it should have an initial tension of [ ] I. 18 to 24 J. 15 to 20 K. 12 to 15 L. 10 30. Normal stress relieving temperature for cast steel: ***Answer: D*** M. 200 to 350^o^ F N. 400 to 500^o^F O. 300 to 400^o^F P. 450 to 550^o^F 31. Most effective alloying element for reducing brittleness of steel at very low temperature: ### Answer: D Q. Manganese R. Molybdenum S. Silicon T. Nickel 32. Statement that a given body is in static equilibrium means that the body cannot: ***Answer: A*** U. Have any type motion V. Be acted upon by more than one force W. Undergo any displacement X. Have any acceleration 33. Ordinary steel begin to lose strength and elasticity significantly at about [ ] ^o^F. ***Answer: D*** Y. 900 - 1000^o^F Z. 800 - 900^o^F A. 750 - 850^o^F B. 600 - 700^o^F 34. Clearance to a new boiler installation to the existing or old plant building should follow a minimum clearance of [ ] between top of the boiler proper and the ceiling as stated in the PSME code. ***Answer: C*** C. 2000 mm (max) D. 1000 mm (max) E. 2130 mm (max) F. 2150 mm (max) 35. For a high corrosion resistant stainless steel, what minimum chromium content is required? ### Answer: A G. 8% H. 4.3% I. 1.1% J. 5.8% 36. Name the type of chuck commonly used for holding work piece in a lathe operation? Example. 3-jaw universal chuck, 4-jaw independent chuck. ***Answer: D*** K. Magnetic chuck L. 2-jaw independent chuck M. 8-jaw universal N. Combination 37. V- belts operate efficiently at about speed (fpm): ***Answer: A*** O. 4500 P. 4400 Q. 4200 R. 3600 38. What type of gear is used for high speed operation? ***Answer: A*** S. Helical T. Spur U. Bevel V. Worm 39. In a pair of gears, [ ] is the plane perpendicular to the axial plane and tangent to the pitch surface. ***Answer: A*** W. Pitch X. pitch plane Y. pitch circle Z. pitch point 40. The phenomenon of continuous stretches under load even if the stress is less than the yield point: ***Answer: D*** A. Elasticity B. Ductility C. Plasticity D. Creep 41. A machinery operation whereby done with the work accurately fastened has a reciprocating (forward and backward) motion and the tool head is stationary. ***Answer: B*** E. Shaping F. planning G. turning H. reaming 42. The following pertain to joining of metals except: ***Answer: C*** I. Welding J. soldering K. casting L. brazing 43. Killed steel is always associated with: ***Answer: A*** M. Silicon N. Manganese O. Phosphorous P. Sulfur 44. The usual ratio of water to soluble oil as cutting fluid: ***Answer: D*** Q. 50% of water to 50% of oil R. 2 water to 1 oil S. 3 water to 1 oil T. 4 to 80 water to 1 oil 45. The good deoxidizer in steel melting: ***Answer: C*** U. Manganese V. Silicon W. All of these X. Aluminum 46. Good stabilizer in stainless steel. ***Answer: C*** Y. Columbium Z. titanium A. all of these B. tantalum 47. What are the common cutting fluids used for cutting metals? ***Answer: A*** C. all of these D. water with soda or borax E. light mineral oil F. soluble oil 48. It is considered semi-solid lubricant: ***Answer: D*** G. all of these H. lube oil I. graphite J. grease 49. Metals are conductive because: ***Answer: A*** K. the electrons are loosely bound to the nuclei and therefore mobile L. having a characteristics metallic luster M. they are on the left side for the periodic table N. they have extra electrons as exhibited by normally possible balance slate 50. The yield strength of a regular yellow brass (65 to 75% Cu, 30 to 35% Zn) can be increased/improved by: ***Answer: A*** O. cold working P. tempering Q. chill casting R. heat treatment 51. Used in as cast condition steel casting with carbon content less than [ ] % C. ***Answer: C*** S. 0.26 T. 0.15 to 0.18 U. 0.20 V. 0.25 52. Liners normally made of: ***Answer: A*** W. cast iron X. alloyed bronze Y. alloyed steel Z. alloyed aluminium 53. Endurance strength is nearly proportional to the ultimate strength but not with [ ]. ***Answer: A*** A. yield strength B. design stress C. shear stress D. all of the above 54. A furnace in melting non-ferrous metals. ***Answer: B*** E. Cupola furnace F. Crucible furnace G. Induction furnace H. Tempering furnace 55. A furnace used in melting ferrous metals: ***Answer: C*** I. Annealing furnace J. Tempering furnace K. Induction furnace L. Normalizing furnace 56. In the gear design, total work must be equally shared by arms. Rim must be rigid to support these arms and also the bead is recommended for its stiffening value. The assumption in the detailed design of rim thickness and depth of bead is [ ] circular pitch (PC). ***Answer: C*** M. 0.65 N. 0.50 O. 0.56 P. 0.44 57. Tooth width measured along the chord at pitch circle: ***Answer: D*** Q. Flank R. Face width S. Width of space T. Chordal thickness 58. The best instrument for measuring a thousand of an inch: ***Answer: A*** U. micrometer V. tachometer W. caliper X. pyrometer 59. All are associated with standard material specification except: ***Answer: C*** Y. American iron and Steel institute Z. Society of Automotive Engineers A. Southeast Asia iron and Steel institute B. American Society for Testing Materials 60. Machine tool used for laying straight lines on metal surfaces made of sharp toot steel is called: ### Answer: A C. plain scriber D. a trammel E. hermaphrodite caliper F. divider 61. It is the difference of addendum and dedendum which is equivalent to the whole depth less working depth. ***Answer: C*** G. fillet space H. fillet radius I. clearance J. backlash 62. A lathe machine threading mechanism: ***Answer: C*** K. reverse gear and lever L. spindle gear M. all of these N. change stud gear 63. Separate forces which can be so combined are called: ***Answer: D*** O. non-concurrent forces P. couple Q. combined forces R. component forces 64. That property of matter which causes it to resist any change in its motion or state of rest: ### Answer: C S. brake T. friction U. inertia V. impulse 65. Negative allowance is also called: ***Answer: A*** W. interference of metal X. fit Y. tolerance Z. allowance 66. Which of the following is not used to resemble the shape of tool bit? ***Answer: A*** A. round nose B. center cut C. square nose D. thread cutting 67. A kind of thread in which the width of the thread is approximately equal to the depth of the thread and the space between threads are approximately equal. ***Answer: A*** E. square thread F. Acme thread G. buttress thread H. Whitworth thread 68. For moderate speed of mating gears, the ideal ratio of contact is: ***Answer: A*** I. 1.25 - 4 J. 1.2 - 1.45 K. 1.0 - 1.3 L. 1.35 - 1.45 69. Ratio of unit lateral longitudinal deformation to unit longitudinal deformation: ***Answer: A*** M. Poisson\'s ratio N. strain O. elongation P. Modulus of Elasticity 70. A lathe with multiple cutting stations: ***Answer: A*** Q. Turret lathe R. lathe S. shaper T. none of the above 71. Nominal diameter of bolts is the: ***Answer: A*** U. major diameter V. minor diameter W. pitch diameter X. base diameter 72. Major and minor diameters are commonly used in: ***Answer: A*** Y. screw thread Z. bolts A. gear B. all of these 73. The distance a helical gear or worm thread along its axis in one revolution if it were free to move axially is called: ***Answer: D*** C. length of action D. line of action E. land F. lead 74. Length of contact between two mating parts in a screw and nut threads measured axially is called: ***Answer: C*** G. arc of contact H. depth of engagement I. length of engagement J. axis of contact 75. It the velocity of a mass is small all the time during which motion takes place is called: ### Answer: B K. deceleration L. uniform motion M. acceleration N. none of these 76. The property of material that relates the lateral strain to longitudinal strain: ***Answer: C*** O. stress P. strain Q. Poisson\'s ratio R. endurance limit 77. Also called eccentrically loaded bearing is: ***Answer: B*** S. full bearings T. offset bearings U. partial bearing V. fitted bearings 78. In the selection of wire rope, regular lay means wires and strands are arranged in the following manner. ***Answer: C*** W. twisted in the same direction X. twisted in any direction Y. twisted in opposite direction Z. twisted in along direction 79. In involute teeth, the pressure angle is often defined as the angle between the line of action and the line of tangent to the pitch circle. It is also termed as: ***Answer: C*** A. helix angle B. angle of recess C. angle of obliquity D. arc of action 80. Height of tooth above pitch circle or the radial distance between pitch circle and top land of the tooth. ***Answer: B*** E. top root F. addendum G. land H. hunting tooth 81. The function of clutch in the machine is: ***Answer: C*** I. lowering of drive speed J. alignment of drive shaft K. to disconnect or connect the drive at will L. to insure that two shafts line up at high speed 82. It is normally recommended and normal for a designer to add a hunting tooth to evenly distribute the wear on meshing teeth like a 53 teeth gears with 30 teeth pinion. Find the rotation of pinion to mesh with same pair of teeth again. ***Answer: D*** M. 120 N. 81 O. 61 P. 53 83. The angle made by the helix of the thread (in a straight thread) at the pitch diameter with a plane perpendicular to the axis is called: ***Answer: A*** Q. lead angle R. truncation S. lead T. angle of thread 84. The rule of thumb in journal bearing the clearance ratio/clearance should be: ***Answer: C*** U. 0.0090 V. 0.0042 W. 0.0010 X. 0.00120 85. The moment of inertia of a rectangle whose base is \"b\" and height \"h\" about its base is: ### Answer: D Y. bh^3^/4 Z. bh^3^/12 A. bh^3^/24 B. bh^3^/3 86. Cold rolled shafting is not available in diameter larger than [ ]. ***Answer: B*** C. 6 inches D. 5 inches E. 6 1/2 inches F. 5 1/2 inches 87. The cast iron flywheels designed with a factor of safety of [ ]. ***Answer: B*** G. 14 to 15 H. 10 to l3 I. 8 to 9 J. 6 to 12 88. A pair of equal and opposite (not collinear) forces that tend to cause a rotation of a body. ### Answer: A K. couple L. centroid M. equilibrium N. vector 89. The ratio of the pitch diameter in inches to the number of teeth. ***Answer: B*** O. pitch circle P. English module Q. module R. pitch diameter 90. When the motion is diminished/decreasing instead of increasing is called: ***Answer: C*** S. deceleration T. uniform negative impulse U. retarded motion V. all of these 91. [ ] is a unit of energy? ***Answer: A*** W. ft-lb X. hp Y. Btu/hr Z. Watt 92. When high strength and durability are a requirements for choosing gear materials it is preferable to use [ ] material. ***Answer: B*** A. hardened bronze B. steel C. phenolic laminated D. white iron 93. [ ] forces when action are parallel. ***Answer: D*** E. couple F. non collinear G. resultant H. non concurrent 94. The product of the mass and the velocity of the center of gravity of the body is called: ### Answer: A I. linear momentum J. angular impulse K. linear impulse L. angular momentum 95. The distance between similar, equally spaced tooth surfaces in a given direction and along a given line. ***Answer: C*** M. pitch circle N. pitch plane O. pitch P. pitch diameter 96. Could be defines as simply push or pull. ***Answer: D*** Q. power R. inertia S. work T. force 97. Opposite directional forces equal in magnitude and parallel is called [ ]. ***Answer: C*** U. non coplanar V. centro W. couple X. coplanar 98. Quantities such as time, volume and density are completely specified when their magnitude is known are also called [ ]. ***Answer: D*** Y. couple Z. resultants A. components B. scalar 99. Designed 200 kw plant must be at least ***Answer: A*** C. PME D. CPM E. ME and PME F. none of these 100. The separate forces which can be so combined are called. ***Answer: D*** G. concurrent forces H. non concurrent forces I. couple J. component forces 101. The most known lubricants being utilizes in whatever category of load and speed are oil, air, grease and dry lubricants like: ***Answer: D*** K. bronze L. lead M. silicon N. graphite 102. A coupling that allows axial flexibility movement in the operation. Made of alternate bolting of steel, leather, fabric, and / or plastic material into two flanges. ***Answer: A*** O. flexible disk coupling P. flexible toroidal spring coupling Q. flexible Oldham coupling R. elastic material bonded coupling 103. It consists of two cranks, a stationary piece called the line of centers the connecting rod is a: ### Answer: D S. five-bar linkage T. four crank braces U. three crank linkage V. four bar linkage 104. Used to change rotary motion to reciprocating motion. ***Answer: A*** W. rack gears X. hypoid gears Y. helical gears Z. herringbone gears 105. The effective face width of a helical gear divided by gear axial pitch. ***Answer: A*** A. Approach ratio B. Arc of action C. Arc of recess D. Face overlap 106. Pitch diameter less the diameter of the roller chain is equal to: ***Answer: B*** E. top land F. bottom diameter G. addendum H. inside diameter 107. Generally applied due to large speed ratio. ***Answer: C*** I. bevel gears J. helical gears K. worm gears L. hypoid gears 108. If the shaft size is specified as diameter 2.00\" max and 1.99\" min in diameter then the 0.0l0\" could be defined as [ ]. ***Answer: D*** M. allowance N. fit O. variance P. tolerance 109. A material plane was subjected to a load. When the load was removed, the strain disappeared. From the structural change, which of the following can be considered about this material? ***Answer: D*** Q. it has high modulus of elasticity R. it does not follow Hooke\'s law S. it is plastic T. it is elastic 110. Helix angle in the range of [ ] degrees is recommended for wide-face helical gears. ### Answer: A U. less than 15 V. less than 20 W. 20 to 35 X. 20 to 22 111. Difference between maximum material limits of mating parts. Or it is a minimum clearance or maximum interference between parts. ***Answer: D*** Y. tolerance Z. fits A. variance B. allowance 112. The concave portion of the tooth profile where it joins the bottom of the tooth. ***Answer: C*** C. root circle D. fillet radius E. fillet curves F. fillet 113. The changes in shape or geometry of the body due to action of a force on it are called deformation or [ ]. ***Answer: D*** G. shear stress H. stresses I. compressive stress J. strains 114. For an evenly and uniform wear on each meshing gear tooth, the ideal design practice is to consider a [ ]. ***Answer: D*** K. wear resistance alloy addition to tooth gears L. heat treatment of the gears M. hardening of each tooth N. hunting tooth addition 115. The reciprocal of a diameter pitch of the ratio of the pitch diameter to the no. of teeth. ### Answer: B O. lead P. module Q. involute R. clearance 116. Ability to resist deformation under stress. ***Answer: C*** S. plasticity T. all of these U. stiffness V. toughness 117. Flat leather belting not recommended for used in a speed in excess of [ ] fpm. ***Answer: C*** W. 3600 X. 4800 Y. 6000 Z. all of these 118. The angle included between the sides of the thread measured in an axial plane in a screw thread. ### Answer: A A. Angle of thread B. Angle between thread or 40^o^ C. Helix angle thread D. Half angle thread or 20^o^ 119. An elastic body whose primary functions is to deflect under load: ***Answer: D*** E. clutch F. stopper G. brake H. spring 120. Poisson\'s ratio is the ratio of: ***Answer: D*** I. elastic limit to yield strength J. lateral deformation to the longitudinal deformation K. shear strain to unit strain L. elastic limit shear strength 121. Manganese steel standard designation, SAE [ ]. ***Answer: A*** M. 13XX N. 10XX O. 11XX P. 8XXX 122. One of these materials is not a structural steel? ***Answer: B*** Q. low carbon steel R. tool and die steel S. stainless and steel T. medium carbon steel 123. The ratio of moment of inertia on cross-section of a beam to this section modulus is: ### Answer: A U. a measure of distance a section modulus V. equal to the radius of gyration and compression W. multiplied by the bending moment of inertia to determine the yield stress X. equal to the area of the cross-section and tension 124. The SAE 2340 shafting contains [ ] % nickel. ***Answer: C*** Y. 3.85 Ni Z. 4% Ni A. 3.25 to 3.75% Ni B. 3.84% Ni 125. Chromium steel standard designation, SAE [ ]. ***Answer: B*** C. 92XX D. 5XXX E. 3XXX F. 11XX 126. Alloy that improves strength of steel at high temperature application. ***Answer: D*** G. aluminum H. manganese I. silicon J. chromium 127. When the air entrainment agent is put into a concrete mix: ***Answer: B*** K. the water/cement ratio must be reduced L. the strength will decrease M. minimal defect N. the strength will suffer up to 50% 128. In general, an alloy with high nickel content retains toughness to quite low temperatures up to O. -380 P. 400 Q. -260 R. -320 129. The differential of the shear equation is the [ ]. ***Answer: D*** S. deflection of the of the beam T. compressive strength of the beam U. tensile strength of the beam V. load on the beam 130. It is recommended not to have direct drive between driven and drive sprockets if the ratio of their teeth exceeds Use 2 or more step combinations. ***Answer: A*** W. 10 times X. 8 times Y. 5 times Z. 6 times 131. The length of the hub should not be made lesser than the face width of the gear. Hub lengths usually vary from 1.25 D to 2D, where D is the shaft diameter. The reasonable diameter of steel hub should be: ***Answer: B*** A. 2D B. 1.8D C. 1.55D D. 1.20D 132. The sum of their addendum and dedendum. ***Answer: A*** E. whole depth F. full depth G. width of space H. working depth 133. It is recommended for high speed application that the minimum number of teeth in small sprockets should be [ ]. ***Answer: D*** I. 26 to 30 J. 12 to 16 K. 26 to 28 L. 18 to 24 134. Stresses that are independent of loads are called [ ]. ***Answer: B*** M. working stress N. residual stresses O. simple stress P. combined stress 135. Material having a high electrical resistance and should not be used as conductor of electrical current. ***Answer: A*** Q. nickel R. aluminum oxide S. silicon base alloys T. iron oxide 136. The best materials for brake drums is: ***Answer: B*** U. aluminum V. cast iron W. steel material X. wrought iron 137. The alloy materials used in the production of metal working tools. ***Answer: D*** Y. titanium, phosphorous Z. tungsten, silicon, hadfield mn. A. vanadium, chromium, molybdenum B. high carbon steel 138. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of [ ] degree/foot of length. ***Answer: C*** C. 0.4 to l D. 0.1 to 1 E. 0.08 to 1 F. 0.6 to 1 139. If the pitch of a screw is 2/9 find the thread per inch. ***Answer: B*** G. 0.34 H. 4.5 I. 5.4 J. 17 140. The property that characterizes a materials ability to be drawn into a wire: ***Answer: B*** K. tensile strength L. ductility M. endurance limit N. thermal conductivity 141. Which of the phases of steel elements has a face-centered cubic structure? ***Answer: B*** O. pyrite P. austenite Q. all of these R. cementite 142. Steel spring material is usually hardened to 400 to 500 BHN and the carbon content is in the range of [ ]. ***Answer: A*** S. 0.50 to 0.90% T. all of these U. 0.45 to 0.48 V. 0.96 to 0.97 143. Principal stresses occur on this plane: ***Answer: B*** W. which are subjected to ultimate tension X. the shearing stress is zero Y. which are subjected to maximum compression Z. which are 45\'apart 144. The property of material wherein the content is continuously distributed through its entire mass. ### Answer: C A. plasticity B. malleability C. homogeneity D. all of these 145. The properties of metals to withstand load without breaking down is: ***Answer: B*** E. elasticity F. strength G. plasticity H. strain 146. Shafts readily available in the market are made in many ways and wide variety of material composition. It is likely be cold drawn carbon steel in size smaller than [ ] inches diameter. ***Answer: A*** I. 3.75 J. 4 K. 5 L. 5 ½ 147. Plain carbon steel standard designation, SAE [ ]. ***Answer: C*** M. 6XXX N. 13XX O. 10XX P. 2XXX 148. The rigidity of polymer can be increased by: ***Answer: C*** Q. furnace melting R. normalizing S. crystallization T. shot peening 149. The difference between cast steel and cast iron. ***Answer: C*** U. all of these V. cast steel has usually less than 1% C while cast iron has 2 % or 3.6 % carbon range W. cast iron has lower strength more brittle and has lower ductility than cast steel X. iron is usually the initial product alter purifying iron ore then further processing by removal of more impurities and carbon content to be able to produce steel grade. 150. It is a general practice to use the following allowable stresses, 4000 psi for main transmitting shaft and 8500 psi for small shafts short shafts and countershafts. For line shaft carrying pulley it is [ ] psi. ***Answer: C*** Y. 7800 Z. 7000 A. 6000 B. 6500 151. Drilling machine cannot do: ***Answer: C*** C. reaming D. spot lacing E. tapping F. broaching 152. Material changes in foundry melting operation are composed of: ***Answer: A*** G. limestone, foundry coke and silica sand H. iron ore, quartz and charcoal I. steel scrap, alloys and charcoal/foundry coke J. scrap wood, alloys and limestone 153. [ ] is a work supporting device which is bolted to the saddle of the lathe machine. lt travels with the cutting tool. lt is a prevention of the springing away of the workpeice from cutting tools. ***Answer: D*** K. rubber-flex collets L. tool post M. follower rest N. carriage stop 154. Almost always the soldering materials are a combination of the following alloys: ***Answer: B*** O. all of these P. lead and tin Q. tin and antimony R. lead and antimony 155. The most popular of all soldering materials in use has composition of : ***Answer: B*** S. 45/55% tin and lead T. 50/50% tin and lead U. all of these V. 60/40% tin and lead 156. The relative strength of a butt welding could be safely assumes as [ ] % efficiency. ### Answer: C W. 95 X. 98 Y. 90 Z. 92 157. Which of the following raw materials are used in the foundry moulding operation? ***Answer: A*** A. silica sand, bentonite, flour/paste water B. silica sand and paste C. silica sand, paste, graphite electrode D. silica sand, linseed oil, flour 158. The following are parts of a micrometer caliper except for: ***Answer: B*** E. thimble F. thread screw G. spindle H. anvil 159. To avoid brittleness of weld or the residual stress in the welding it is normally sires relieved of I. normalizing J. tempering K. flame hardening L. annealing 160. Steel with certain % carbon maximum can readily by welded by all process and the resulting strength of the portion welded is as strong as the base material. ***Answer: D*** M. 0.15% C max N. 0.35% C max O. 0.25% C max P. 0.30% C max 161. Commonly used steel melter as deoxidizer because of its easy availability and cheap price. ### Answer: B Q. silicon R. aluminum S. zinc T. manganese 162. Curved formed by the path of a point on a straight line as it rolls along a convex base curve. The base curve is usually a circle and generally used as the profile of gear tooth. ***Answer: B*** U. axial plane V. involute W. arc of recess X. arc of action 163. Several forces which can be combined are called: ***Answer: C*** Y. resultants Z. composition of forces A. components B. collinear force 164. Ideal herringbone gear helix is in the range of [ ]. ***Answer: A*** C. 30 to 45 D. 35 to 50 E. 25 to 30 F. 15 to 20 165. The distance from a point on a screw thread to a corresponding point on the next thread to a corresponding point on the next thread measure along axis. ***Answer: D*** G. flank H. lead I. crest J. pitch 166. As recommended the center to center distance between sprockets should not be less than [ ] K. 2.26 L. 1 ¾ M. 1 ½ N. 2.59 167. Machine shop instrument for checking the flatness of plane surfaces to 10ths to thousands of a centimeter. ***Answer: C*** O. blade type micrometer P. dial caliper Q. planimeter R. micrometer 168. Tools usually used in wood pattern making a foundry shop. ***Answer: A*** S. saws and chisels T. band saw U. knives and drills V. drills machine 169. Recommended design practice for steel line shafting to limit the linear deflection to inch/foot of length (maximum). ***Answer: B*** W. 0.020 X. 0.010 Y. 0.012 Z. 0.150 170. Big chain sprocket wheels are designed with spokes/arms are generally elliptical in cross section with major axis [ ] times the minor axis. ***Answer: A*** A. 2 B. 2 ½ C. 1 ½ D. 3 171. Molybdenum steel standard designation SAE [ ]. ***Answer: C*** E. 88xx F. 48xx G. 40xx H. 46xx 172. For acceptance ideal range of tightness which may result from application of specific combination of allowance and tolerances. ***Answer: D*** I. allowance limit J. tolerance limit K. interference L. fit 173. A radian is equal to [ ]. ***Answer: C*** M. 57.020^o^ N. 57.706 ^o^ O. 57.296 ^o^ P. 57.190 ^o^ 174. The absolute viscosity of the fluid divided by its density expressed in the same terms of units is also called [ ]. ***Answer: B*** Q. centistokes R. kinematic viscosity S. Petroff's equation T. light petroleum oil 175. Improves red hardness of steel: ***Answer: C*** U. silicon V. lead W. cobalt X. manganese 176. It is required that pipes bigger than [ ] mm should not be screwed but flanged. ***Answer: B*** Y. 76.2 Z. 63.5 A. 2 ¼ inch B. 68.5 177. Formed by the interaction of the adjacent flanks of adjacent threads when extended is called. ### Answer: D C. crest apex D. all of these E. sharp root F. sharp crest 178. In designing the spoke or wheel arm if the flywheel, it is ideal to consider that the cross- sectional area of the spoke at the rim side should not be less than [ ] of the cross area at the hub side. ***Answer: B*** G. 80 % H. 2/3 I. 90 % J. 3/8 179. The cutting up to 70^o^ is best for drilling extremely hard metals and for soft materials [ ] K. 60 L. 45 M. 40 N. 48 180. Single forces which produces the same effect upon mass replacing two or more forces acting together is called: ***Answer: B*** O. vector P. resultant Q. component R. resolution 181. [ ] is the process necessary to reduce the brittleness in alloy steel. ***Answer: D*** S. martempering T. carburizing U. normalizing V. tempering 182. The welded joints permit placing the added metal exactly where needed and produce an integral structure which can develop [ ] % efficiency on any thickness section especially for mild steel materials. ***Answer: C*** W. 95 % X. 85 % Y. 100 % Z. 90 % 183. The lack of backlash in a spur gear design/operation may result to [ ]. ***Answer: A*** A. overloading B. jamming C. all of these D. overheating 184. [ ] forces means when their lines of action can be extended to meet to one point. ***Answer: A*** E. concurrent F. centroids G. collinear H. resultants 185. Imaginary formed by the intersection of the flanks of a thread extended is called [ ]. ### Answer: A I. sharp J. sharp root K. root apex L. all of these 186. Permissible variation of the manufactured or machined dimensions is called: ***Answer: D*** M. intolerance fits N. deviation O. allowable P. tolerance 187. Molybdenum-chromium-nickel steel designation: ***Answer: B*** Q. SAE 48xx R. SAE 43xx S. SAE 56xx T. SAE 46xx 188. [ ] is also called strain hardening. ***Answer: A*** U. work hardening V. quenching W. annealing X. normalizing 189. A major alloy in tool steel. ***Answer: A*** Y. Cr Z. FeN A. Cobalt B. Mn 190. Distance measured perpendicular to the axis between the crest of the thread and the root of its mating thread in a thread assembly of screws. ***Answer: C*** C. tolerance class D. crest truncation E. crest clearance F. tolerance limit 191. Bearing surface that completely surrounds the journal is also called [ ]. ***Answer: B*** G. offset bearing H. full bearing I. centrally loaded bearing J. babbitt learning 192. The width of a tooth space exceeds the thickness of each of the engaging tooth on the pitch circle [ ]. ***Answer: D*** K. allowance L. bottom land M. top land N. backlash 193. [ ] addition imparts resistance to atmospheric corrosion in steel. etc. ***Answer: C*** O. aluminum P. manganese Q. copper R. bronze 194. Should two equal and opposite collinear forces is added to the forces already in equilibrium, which of the following statement is true. ***Answer: C*** S. Unbalanced of moment is maintained. T. Equilibrium is distributed. U. Equilibrium is maintained. V. It increases an unbalanced situation. 195. Iron based alloy containing 9-16 % chromium. ***Answer: C*** W. Mn hadfield steel X. chrome-alloy steel Y. stainless steel Z. high chrome steel 196. A rule of thumb, the speed limit of flywheel rim speed should be 6000 fpm for cast iron material and for cast steel flywheel rim at [ ] meter/min. ***Answer: A*** A. 3050 B. 4500 C. 7000 D. 10000 197. The distance between rivet centers nearest each other is adjacent rows is called [ ]. ### Answer: A E. pitch F. back pitch G. margin H. diagonal pitch 198. The purpose of lubrication is mentioned, EXCEPT: ***Answer: C*** I. to lighten the load J. prevent corrosion/adhesion K. prevent adhesion L. cool the moving parts 199. The process of peening the joint portion immediately after the welding greatly improves the fusion structures, avoids possible cracking, avoids possible distortion, etc. Peening is also called M. tempering N. martempering O. normalizing P. annealing 200. Resultant of two or more component forces is called [ ]. ***Answer: B*** Q. component forces R. resultant S. component T. collinear 201. For stable equipment foundation, the total combined engine, driven equipment and foundation center of gravity must be kept below the foundations top that usually about [ ] times the usual total combined weight if the machine it is supposed to support. ***Answer: D*** U. 3 to 4 V. 3 to 7 W. 2 to 4 X. 3 to 5 202. All associated with standard materials specification, EXCEPT: ***Answer: B*** Y. American Iron and Steel Institute Z. South East Asia and Steel Institute A. Society of Automotive Engineers B. American Society for Testing Materials 203. It is ideal for maximum quietness in sprocket drive operation to choose [ ] or more teeth. ### Answer: C C. 24 D. 18 E. 27 F. 21 204. Shafting up to 3 inches in diameter is usually made from cold rolled steel and the common biggest diameter of cold rolled steel is [ ]. ***Answer: D*** G. 4 ¼ inches H. 6 7/8 inches I. 6 ¾ inches J. 5 inches 205. Designated pipe color used in communication: ***Answer: D*** K. silver gray L. aluminum M. bare N. white 206. Not part and in fact should not be used in the steel melting process. ***Answer: A*** O. coke P. silicon Q. zinc R. aluminum 207. It is rigid piece which serves to transmit force from a piece to another piece or to cause/control motion. ***Answer: D*** S. follower T. crank U. cam V. link 208. Type of bolt commonly used in the construction in both ends. ***Answer: A*** W. stud bolt X. acme thread Y. hex bolt Z. square threaded bolts 209. The normal helix angles in helical gears are recommended in the range of [ ] degrees. ### Answer: C A. less than 18 B. 20 to 35 C. 15 to 25 D. 20 to 30 210. The ratio of stress acting on an elastic substance to the decrease in volume per unit volume. ### Answer: A E. Bulk modulus F. Modulus of resilience G. elastic limit H. modulus of elasticity 211. Rule of thumb in calculating the equipment foundation mass should be [ ] times the weight of the machinery it is supposed to support. ***Answer: A*** I. 3-5 J. 3-6 K. 3-9 L. 2-4 212. The welding made along the edges of two parallel plates is called [ ]. ***Answer: C*** M. groove joint N. fillet joint O. edge joint P. corner joint 213. Class of material exhibiting decreased electrical conductivity with increasing temperature. ### Answer: C Q. aluminum R. p-type semiconductors S. metals T. n-type semiconductors 214. Cast iron flywheels are commonly designed with a factor of safety of: ***Answer: A*** U. 10 to 13 V. 10 to 12 W. 10 to 14 X. 80 to 13 215. Stress relieving is also [ ] for the purpose of reducing the internal stresses of steel material/metal. ***Answer: B*** Y. tempering Z. normalizing A. all of these B. annealing 216. A ridge of uniform section in the form of a helix cut around the circumference of a cylinder and advancing along the axis. ***Answer: C*** C. thread roots D. helix threads E. screw threads F. chamfers 217. Martensite (stainless steel) contains 4 to 26 % Cr and a maximum of [ ] % nickel. ### Answer: A G. 2.5 H. 3.25 I. 3.5 J. 2.0 218. The design stress and factor of safety are related in the following manner: ***Answer: A*** K. design stress = ultimate stress/factor of safety L. ultimate stress = factor of safety/design M. design stress = factor of safety/times stress N. none of these 219. The material that can cut/wear substances subjected to: ***Answer: B*** O. carbide P. abrasive Q. tungsten R. vanadium 220. A resulting factor that replace two or more forces acting together. ***Answer: C*** S. vector T. couple U. resultant V. equilibrant 221. Peculiar strength of the metal to resist being crushed. ***Answer: C*** W. shear strength X. ultimate strength Y. compressive strength Z. elastic limit 222. Which of the following is not a viscoelastic material? ***Answer: D*** A. teflon B. plastic C. all of these D. metal 223. Method of finishing/shaping a machine part of exceptionally high carbon or high chromium steel parts (or very hand material). ***Answer: D*** E. using oxygen lancing F. machining using carbide insert G. using abrasive grinding H. machining high speed tool steel 224. In a certain chain drive design for large speed reduction it is preferable to use a double reduction or compound type of transmission instead of single two sprockets transmission. Drives should be so designed that the angle between two tight chain strands does not exceed [ ] degrees. ***Answer: A*** I. 45 J. 60 K. 55 L. 90 225. Steel springs are made of high carbon steel, heat treated and/or cold work to a high elastic limit to get elastic deflection. In general the carbon content is at [ ]. ***Answer: C*** M. 0.40 % or more N. 0.65 % or more O. 0.50 % or more P. 0.66 % or more 226. The surface along the fillet curves or between the fillets radius of the two adjacent tooth gears. ### Answer: A Q. bottom land R. flank S. fillet T. top land 227. Not acceptable to welding due to low tensile strength and poor ductility, etc. ***Answer: C*** U. copper parts V. cast iron materials W. aluminum parts X. bronze parts 228. Plus or minus tolerance can also be called as [ ]. ***Answer: C*** Y. total tolerance Z. unilateral tolerance A. bilateral tolerance B. allowance 229. The total machinery weight plus the foundation weight should be well distributed in the corresponding soil area which enough to cause a bearing stress within the safe bearing capacity of the soil with a factor of safety of [ ]. ***Answer: D*** C. 4.5 D. 3 E. 4.2 F. 5.0 230. [ ] is the plane perpendicular to the axial plane and to the pitch plane. In gears the parallel axes, and the plane of rotation coincide. ***Answer: C*** G. tangent plane H. straight plane I. transverse J. reference 231. The conical surface at the starting end of the thread is called [ ]. ***Answer: B*** K. Pitch cone L. chamfer M. crest N. flute 232. It is a good design practice for steel lineshafting to consider a limit to the linear deflection of O. 0.050 P. 0.010 Q. 0.020 R. 0.060 233. The five principal parts of a paper of a shaper are, the table, tool, slide, base, ram and [ ]. ### Answer: A S. column T. vise U. drive motor V. apron 234. In designing gears for power transmission consider a efficiency of [ ] as recommended. ### Answer: D W. 96 % or more X. 89 % or more Y. 85 % or more Z. 98 % or more 235. Progressive change of position of a body is called: ***Answer: C*** A. acceleration B. momentum C. motion D. force 236. The ideal thickness of the cutter at the pitchline for cutting helical gears should be [ ] of the normal circular pitch. ***Answer: C*** E. 3/8 F. ¾ G. ½ H. 5/1 237. In drilling soft materials use cutting angle as low as 40 degrees but for extremely hard material up to [ ] degrees is recommended. ***Answer: D*** I. 80 J. 55 K. 75 L. 70 238. The surface of the gear between the fillets of adjacent teeth is called [ ]. ***Answer: A*** M. bottom land N. flank O. top land P. flank tooth 239. An act of cutting out a piece of metal at a desired shape and size: ***Answer: B*** Q. broaching R. blanking S. slitting T. drinking 240. A research agency handling assistance to all foundry, machine shop and metallurgical plant operation. ***Answer: A*** U. MIRDC V. All of these W. DOST X. BOI 241. The soldering material in the range of [ ] in steel readily responds to heat treatment. ### Answer: C Y. 0.35 to 0.40 %C Z. 0.28 to 0.30 %C A. 0.18 to 0.15 %C B. 0.12 to 0.15 %C 242. Web is part of a drill and is usually thicker: ***Answer: B*** C. beside the land D. nearing the shank E. close the flute F. at the tip portion 243. It is a symbol that the work surface should be machined-finished and usually indicated in the drawing and usually indicated in the drawing and placed on the line that represents the surface to be machined. ***Answer: A*** G. f H. 15 I. 20 J. F.A.Q. 244. Safety features that must be placed and maintained at Machine, Blacksmith, Welding and foundry Shops. ***Answer: C*** K. walkaway guide L. all of these M. safety notices in markers/boards N. safety goggles 245. Deflection of a beam is: ***Answer: C*** O. proportional to the modulus of elasticity and moment of inertia P. proportional to the load imposed and inversely to length squared Q. inversely proportional to the modulus of elasticity and moment of inertia R. inversely proportional to the weight imposed times the length 246. The amount by which the dedendum in a given gear/pinion exceeds the addendum of its mating pinion/gear. Also the radial distance between the top of tooth and the bottom of the mating tooth space. ***Answer: C*** S. tip relief T. top land U. clearance V. space 247. Axially the top of a tooth and the bottom of the mating tooth space. ***Answer: A*** W. keyseat X. cotter pin seat Y. flute Z. set screw point 248. [ ] indicates how many times a volume of material is heavier than an equal volume of water. ***Answer: A*** A. specific gravity B. specific volume C. specific weight D. specific density 249. Commonly use /produced screws/bolts/nuts/ and for engineering applications is a series. ### Answer: A E. UNC F. ANSI G. withworth H. UNF 250. Avoidance of vibration in equipment or machinery foundations, a mass of weight equal to I. 10 to 20 J. 8 to 15 K. 15 to 20 L. 8 to 10 251. [ ] is the name applied to reciprocating circular motion as that of a pendulum. ### Answer: D M. intermittent motion N. reciprocating motion O. momentum P. oscillation 252. Nickel-chromium-molybdenum steel designation, SAE [ ]. ***Answer: C*** Q. SAE51xx R. SAE74xx S. SAE49xx T. SAE64xx 253. Moment of inertia is also called: ***Answer: C*** U. modulus of elasticity V. weep strength W. none of these X. radius of gyration 254. It is hardening treating whereby a cast metal is being heated to very high temperature then suddenly subjected to rapid cooling to improve hardenability or wear resistance is called: ***Answer: D*** Y. annealing Z. normalizing A. tempering B. quenching 255. Surface connecting the crest and roots of the screw thread. ***Answer: D*** C. lead angle D. length of engagement E. top land F. flank 256. A good general purpose deoxidizer and promoted fine grain in steel: ***Answer: D*** G. copper H. magnesium I. molybdenum J. silicon 257. Treatment process that produces a residual compressive stress at the surface (which occupy more volume) and residual tension on the inside that results in considerable increase in the fatigue strength for members on torsional/bending. ***Answer: D*** K. heavy oil quenching L. partial quenching M. quenching N. shallow quenching 258. The flux that should be avoided in soldering electrical connection or commutator wires as it tends to corrode the connections. ***Answer: D*** O. sal ammoniac P. zinc chloride Q. stearin R. acid fluxes 259. The characteristics of tool steel to sustain shocks and major impacts is due to its: ***Answer: A*** S. toughness T. stiffness U. ductility V. machinability 260. Bevel gears subjected to corrosion and lightly loaded are usually made of [ ]. ***Answer: C*** W. bronze X. brass Y. all of these Z. duralumin 261. As a result of thumb the depth of foundation could be about 3.2 to [ ] times the engine stroke. ### Answer: A A. 4.20 B. 4.0 C. 3.40 D. 3.80 262. The application of electrical current to the corrosion circuit to counter the corrosion reaction is called: ***Answer: A*** E. cathodic protection F. sacrificial anodes method G. chemical corrosion process H. galvanic action 263. A major component of cast steel. ***Answer: B*** I. silicon J. iron K. manganese L. chromium 264. Normally cast iron contains 2 % carbon or more and silicon in the range of [ ] %. ***Answer: A*** M. 1-3 N. 2-4 O. 2-3 P. 1-6 265. If a set of spur gears are made. Installed and lubricated properly, they normally may be subjected to failures like: ***Answer: C*** Q. tooth palling R. tooth spending S. pitting T. shearing 266. From experience specify the conventional limit of flywheel operations to be at 6000 ft/min for cast iron and [ ] ft/min for cast steel. ***Answer: D*** U. 7000 V. 8000 W. 10000 X. 12000 267. What equation to use in computing the acceleration of the center of a rolling ball with a diameter of 8 inches. ***Answer: B*** Y. 0 Z. rw^2^ A. w^2^/r B. v^2^/r 268. In a cutting tool the cutting end can also be generally called [ ]. ***Answer: B*** C. edge cutting tool D. nose E. back nose F. side rake 269. What factors can modify the recommended cutting speed of known work piece? ***Answer: D*** G. rough cutting of work piece H. modify the shape of the cutting tools I. use correctly shaped tools J. depth cut 270. The material for engine radiator is usually made of [ ]. ***Answer: A*** K. yellow brass L. silicon brass M. admiralty brass N. navy brass 271. What type of leather belting should be used at an ambient temperature above 140^o^F and possible acid liquid coming in contact with the belt? ***Answer: C*** O. mineral tanned P. combination of oak Q. none of these R. oak tanned 272. A machine shop equipment that can flatten horizontally, vertically or angular plane. ***Answer: A*** S. shaper machine T. welding machine U. drill machine V. power saw 273. Petroleum by product used as electrodes in an electric arc furnace melting operation. ### Answer: C W. anthracite coke X. foundry coke Y. graphite electrodes Z. bituminous coke 274. An example of rectilinear translation: ***Answer: C*** A. locomotive wheels B. rack gear C. piston of an engine D. jack 275. [ ] does not affect the tensile strength of steel. ***Answer: D*** E. sulfur F. cobalt G. phosphorous H. baron 276. Which of the following is an unsafe condition in operating a lathe machine? ***Answer: B*** I. wearing denim pants/safety shoes J. wearing canvas apron K. operating with safety gloves L. wearing safety goggles/hearing aid 277. Relief angles of single point cutting test in cutting mild steel, cast iron and other average work as recommended should be in the ranges of [ ] degrees of high speed tools. ***Answer: A*** M. 8 to 12 N. 10 to 15 O. 5 to 7 P. 12 to 16 278. Tap not used for cutting threads [ ]. ***Answer: A*** Q. tapping tap R. bottoming tap S. plugging tap T. taper tip 279. Alloy steel axle under repeated load/stress will eventually fail if the load/stress is above the endurance for the steel under consideration. The endurance for the steel under consideration. The endurance limit of the steel is therefore: ***Answer: B*** U. equal to allowable stress at the module of elasticity V. equal to half the ultimate strength W. equal to module of elasticity X. equal to 80 % of the elastic limit 280. All terms and abbreviation deal with wire rope arrangement except this [ ] which deals with wire rope materials strength. ***Answer: C*** Y. preformed Z. IWRC A. Mps B. lang lay 281. Mirror finish has surfaces fineness of [ ] rms. ***Answer: A*** C. 1 D. 2 to 8 E. 1 to 3 F. 2 to 5 282. Chromium steel (to include heat and corrosion resistant) designation. ***Answer: B*** G. SAE56xx H. SAE514xx I. SAE61xx J. SAE9xxx 283. Non-metallic material for high melting temperature being used as furnace lining. ***Answer: B*** K. quartz bricks L. refractories M. silica sand N. dolomite clay bricks 284. For economical cost in the manufacturing large worm gears the following materials are usually applied. ***Answer: A*** O. bronze rim with cast steel spider P. cast iron rim with bronze spider Q. cast steel rim with brass spider R. alloyed aluminum rim with cast iron soider 285. In greater quantity, this element is harmful to the molten ferrous metal. ***Answer: D*** S. silicon T. aluminum U. oxides V. sulfur 286. [ ] thread is used where the thread requires great strength and usually cut square on one side and slanting on the other side. ***Answer: B*** W. janno X. buttress Y. square Z. double 287. Internal stress exerted by the fibers to resist the action of outside force is called [ ]. ### Answer: A A. shearing stress B. tensile stress C. ultimate stress D. compressive stress 288. One of the following materials is not mentioned for wire rope pulleys/sheave applications. ### Answer: A E. plastic F. iron G. paper H. copper alloy 289. [ ] is the theoretical profile of the thread for length of one pitch in the axial palne on which the design forms both the external threads are based. ***Answer: C*** I. basic form of thread J. effective thread K. basic profile of thread L. design form of external thread 290. A tool not belonging to the group: ***Answer: C*** M. hermaphrodite caliper N. divider O. double VEE block P. trammel 291. The maximum stress induced in a material when subjected to intermittent or repeated load without causing failure is called: ***Answer: B*** Q. ultimate stress R. endurance limit S. ultimate torque T. elastic limit 292. The factor of safety generally applied I wire rope design starts at 3-4 standing rope application, 5-12 for operating rope and [ ] for hazard to life and property application like foundry operation. ***Answer: A*** U. higher values V. 7-10 W. 8-10 X. 10-18 293. Silicon manganese steel designation, SAE [ ]. ***Answer: C*** Y. 72xx Z. 40xx A. 92xx B. 9xx 294. The recommended age limit of fire tube boilers. ***Answer: B*** C. 35 years D. 30 years E. 40 years F. 50 years 295. In machine shop, hand forging operation of lengthening a piece of stock while reducing the cross-sectional area of work is called: ***Answer: B*** G. bloating H. upsetting I. spreading J. draining out 296. A watt is equivalent to: ***Answer: B*** K. 42.4 BTU/min L. 1 N-m/sec M. 44.2 ft-lb/min N. All of these 297. Which of the following services is not considered to be work machinist? ***Answer: C*** O. reboring P. grinding Q. overhauling R. honing 298. Cold drawing is also called: ***Answer: A*** S. hard drawn T. cold lap steel U. strain hardening V. oxidized steel 299. The top and bottom for gears is similar formed as to crest and [ ] for screw thread. ### Answer: B W. flank X. root Y. flank of tooth Z. top land 300. Intermediate gear is also called [ ] gear in a gear train arrangement. ***Answer: A*** A. idler B. pinion C. third gear D. mounted gear 301. The brittleness in steel at elevated temperature is [ ]. ***Answer: C*** E. hard drawn F. cold lap G. red shortness H. residual stresses 302. Material may be stretched and a still return to its form/condition upon the release of force is called [ ]. ***Answer: D*** I. plasticity J. modulus of elasticity K. ductility L. elastic limit 303. Type of chuck wherein the piece with standard diameter or size could be attached fast and quick specially small size work of mass production. ***Answer: C*** M. lathe drive plate N. clamp toe dog O. collet attachment P. steady center rest 304. Moment curve for simple beam with a concentrated load at middle span takes the shape of a: ### Answer: A Q. triangle R. rectangular S. trapezoid T. semi-eclipes 305. This particular cutting tool material could withstand cutting speed beyond those possible with other cutting tool materials. ***Answer: D*** U. titanium carbide V. ceramic W. carbide grade X. cubic boron nitride 306. Common defects encountered in the foundry shop steel casting operating and also in welding practices. ***Answer: D*** Y. cracks Z. cold shot A. part line B. blow/pin holes 307. Some experiments made at Cornell University showed that experience mechanic could break a C. 3/8 inch D. 5/8 inch E. ½ inch F. 7/16 inch 308. The 3 most commonly used in production of precision work tools. ***Answer: C*** G. chrome manganese H. titanium I. high speed J. chrome-molybdenum 309. Type of carbon and alloy used in production of precision work tools. ***Answer: C*** K. chrome-manganese L. titanium M. high speed N. chrome molybdenum 310. Recommended hardness of pinion for helical/herringbone gear tooth should be [ ] BHN point to sustain life. ***Answer: C*** O. 50-59 P. 48-65 Q. 40-50 R. 30-60 311. Fast process of analyzing all elements and chemical components of steel casting. ***Answer: D*** S. Pyrometer T. Carbon analyzer U. Wet analyzer V. Spectrometer 312. In small quantity this alloy is effective for improvement strength at high temperature. ### Answer: A W. chromium X. manganese Y. selenium Z. molybdenum 313. Which of the following is not a kind of madrel? ***Answer:*** A. expanded B. extended C. contraction D. taper 314. The arc of action to circular pitch or length of action to base pitch. ***Answer: B*** E. approach F. contact ratio G. arc of action H. arc of approach 315. A cutting tool angle between the side cutting edge and the plane perpendicular to direction of free travel is [ ] angle. ***Answer: D*** I. side relief J. side cutting edge K. lead L. side rake 316. The surface between the pitch circle and bottom land. ***Answer: B*** M. coremaking N. machining O. fitting P. pattern 317. Test showed that steel pulleys has less slippage than of cast iron pulleys in range of: ***Answer: B*** Q. 1.8-2.6 R. 1.8-2.8 S. 2.35-2.7 T. 2.0-2.8 318. The bottom surface joining two sides of thread in screw. ***Answer: C*** U. pitch V. crest W. bottom land X. root 319. Shear modulus is also: ***Answer: D*** Y. shear elasticity Z. poison's ratio A. modulus of elasticity B. modulus of rigidity 320. To prevent leakage in dynamic seal. ***Answer: C*** C. gaskets D. seals E. packing F. felts 321. Top surface joining two sides of thread in screw. ***Answer: D*** G. pitch H. top flank I. top land J. crest 322. The frictional forces depends on coefficient of friction and ***Answer: C*** K. torque L. weights of object M. normal force N. moment 323. The number of cycles required to cause failure for given stream level. ***Answer: C*** O. endurance P. fatigue Q. fatigue life R. rupture 324. The tool bit made of tool blank consists of face, nose, shank and [ ]. ***Answer: D*** S. cutting edge T. none of these U. round nose V. base 325. The cutting tool used the shaper are similar to turning tools of [ ] machine. ***Answer: A*** W. planer X. broaching Y. boring Z. lathe 326. The blades of hack saw have number of teeth range of: ***Answer: B*** A. 15-38 teeth/in B. 14-32 teeth/in C. 12-30 teeth/in D. 12-32 teeth/in 327. The safeguard in minimum of [ ] mm in height for the use as toe guard/toe board. ### Answer: C E. 165 F. 135 G. 150 H. 120 328. Not part of the head stock. ***Answer: C*** I. back gear J. spindle K. anvil L. motor 329. A lathe carriage part that bridge across the bed to carry the cross slide and tool rest. ***Answer: C*** M. automatic N. apron O. compound rest P. saddle 330. Screw thread projecting from a cylindrical surface. ***Answer: D*** Q. thread series R. thread shear area S. straight T. taper thread 331. Vertex distance is a term used in [ ] gearing. ***Answer: C*** U. spiral V. worm W. bevel X. zerol 332. The modulus of elasticity of steel E at 30 x10^6^ psi iron at 10 x 10 ^6^ psi but concrete is much lower at [ ] x10^6^ psi but concrete is much lower at [ ] x10^6^ psi. ***Answer: B*** 333. Two more forces acting together could be placed by a single force with same effect in a mass. ### Answer: C Y. couple of forces Z. resolution of forces A. resultant B. concurrent of forces E. 334. What is recommended cutting speed range of bronze in fpm? ***Answer: B*** C. 60/70 D. 200/250 E. 80/60 F. 100/110 335. The resultant of two or more forces is also called: ***Answer: D*** G. equilibrium H. momentum I. concurrent forces J. resolution of forces 336. Type of leather belt being applied with waterproof cement. ***Answer: C*** K. combination of oak/mineral tanned L. all of these M. oak tanned N. mineral tanned 337. Cam in general may be divided into two classes: uniform motion cam and [ ] motion cam. ### Answer: D O. reverse P. gravity Q. decelerated R. accelerated 338. For ordinary turning, drilling and milling on low strength steel the cutting fluid applied have soluble oil with consistency of 1 part oil to [ ] parts water. ***Answer: D*** S. 10 to 30 T. 10 U. 5 to 10 V. 10 to 20 339. It is associated with nickel steel. ***Answer: D*** W. magnesium X. lead Y. columbium Z. tin 340. Often called necking or grooving in the cutting of a groove next to a shoulder on a piece of work is called in a machine shop practice. ***Answer: B*** A. chamfering square B. undercutting C. corner D. edge cutting 341. To prevent engine vibration to affect the surrounding area, it is a standard practice isolates the engine and its foundation by at least [ ] mm. ***Answer: C*** E. 30 F. 20 G. 25 H. 36 342. It is the drill backbone which runs the entire length of the drill between plates and sides rigidity to the entire drill. ***Answer: D*** I. drill shaft J. shank K. tang L. web 343. Grout material use under the machine bed and foundation surface should be: ***Answer: B*** M. 1 part cement & ½ part green sand & ¼ part gypsum N. 1 part cement & 1 part green sand O. 1 part cement & 1 part screened sand & ¼ part gypsum P. 1 part cement & 1 ½ part screened sand & ½ part stone. 344. The acceleration of the point of contact is: ***Answer: C*** Q. rv^2^ R. rw^2^ S. v^2^/r T. w^2^/v 345. The recommended lubricants for the chain drive operation. ***Answer: B*** U. SAE 4140 V. petroleum oil W. moly slip X. heavy grease 346. In the SAE identification code steel shafting the 3^rd^ and 4ht digits represents the content of: ### Answer: C Y. \% of manganese in steel Z. \% of alloy elements A. \% of carbon contents B. \% of chromium in the steel 347. The minimum recommended worm pitch diameter is ¼ in. and the maximum is [ ] in. ### Answer: D C. 1 ¾ in. D. 2 ¾ in. E. 3 in. F. 2 in. 348. At a given section of an I beam the maximum bending stress occurs at the [ ]. ***Answer: D*** G. maximum shear stress area H. neutral axis I. web joint near the flange J. outer most fiber 349. What is 25 % of ½? ***Answer: C*** K. 12 ½ L. 12.5 M. 1/8 N. ¼ 350. The process of increasing the carbon content to the surfaces of steel by exposing it to hot carbonaceous material above the transformation of 1650 to 1750^o^F. ***Answer: C*** O. carbonitriding P. casehardening Q. carburizing R. induction hardening 351. What is the lightest known metal? ***Answer: D*** S. mercury T. steel U. chromium V. aluminum 352. Designated pipe color used in electricity. ***Answer: B*** W. light blue X. light orange Y. green Z. white 353. What is the value in degrees of 1 radian? ***Answer: C*** A. 57.49^o^ B. 57.94^o^ C. 57.29^o^ D. 57.92^o^ 354. What is the equivalent value of 1083^o^C in ^o^F? ***Answer: B*** E. 1198 F. 1981 G. 1918 H. 1891 355. The catwalk standard required for cleaning an engine can be found in any power plant or power generating unit. ***Answer: B*** I. 24 in. J. 22 in. K. 23 in. L. 25 in. 356. It is ideal for maximum for maximum quietness in sprocket drive operation to choose [ ] or more teeth. ***Answer: C*** M. 25 N. 26 O. 27 P. 28 357. Consider a maximum safe center distance of sprockets should be [ ] pitches. Very long center distance caused catenary tension in the chain. ***Answer: B*** Q. 70 R. 80 S. 90 T. 100 358. Extra flexible hoisting rope application is [ ]. ***Answer: B*** U. 6 x 17 V. 6 x 37 W. 6 x 9 X. 6 x 21 359. Deals only with the motion of bodies without reference to the forces that cause them. ### Answer: C Y. kinetics Z. motion A. Kinematics B. acceleration 360. Tooth width measurement along the chord at the pitch circle. ***Answer: C*** C. chord space D. chord clearance E. chordal thickness F. chordal length 361. The rule thumb is journal bearing design, the clearance ratio/clearance should be: ***Answer: D*** G. 0.1001 H. 0.0101 I. 0.0110 J. 0.0010 362. The shaft that is used to connect or disconnect at will is called [ ]. ***Answer: A*** K. clutch L. bearing M. brake shaft N. lock shaft 363. It is recommended for high speed application that the minimum number of teeth in small sprocket should be [ ]. ***Answer: B*** O. 12 to 20 P. 18 to 24 Q. 16 to 32 R. 14 to 28 364. Material having a high electrical resistance and should not be used as conductor of electrical current. ***Answer: D*** S. magnesium T. copper U. nickel V. iron 365. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of [ ] degrees/foot of length. ***Answer: B*** W. 0.004 to 0.006 X. 0.08 to 1 Y. 0.006 to 0.008 Z. 0.008 to 1 366. The property that characterizes a materials ability to be drawn into a wire. ***Answer: C*** A. plasticity B. elasticity C. ductility D. utility 367. The distance from a point on a screw thread to a corresponding point on the next measure along the axis. ***Answer: D*** E. radial F. module G. thickness H. pitch 368. Designated pipe color used in communication. ***Answer: C*** I. green J. light blue K. white L. light orange 369. Stress relieving is also [ ] for the purpose of reducing the internal stress of steel material/metal. ***Answer: B*** M. quenching N. normalizing O. tempering P. drawing 370. Martensite (stainless steel) contains 4 to 26 % Cr and a maximum of [ ] %. ***Answer: C*** Q. 1.5 R. 3.5 S. 2.5 T. 4.5 371. Progressive change in position of a body is called: ***Answer: B*** U. acceleration V. motion W. force X. momentum 372. Compute the cutting speed in fpm of a workpiece with 2 inches diameter and running at 100 rpm. ***Answer: A*** Y. 52 Z. 62 A. 25 B. 26 373. A body weighing 1000 lbs falls and stirkes a 2000 lb/in spring. The deformation of the spring is 374. To be responsible for the preparation of plans, design, investigations, valuation, technical reports, specifications, project studies or estimates, he must be a [ ]. ***Answer: C*** C. ME D. CPM E. PME F. CPM, ME & PME 375. To teach professional subjects in mechanical engineering course, he must be a duly licensed [ ] or a Master's degree or Doctorate degree holder in Mechanical Engineering. ***Answer: C*** G. ME and CPM H. CPM I. PME J. ME 376. To operate, tend or maintain or be incharge of operation, tending or maintenance of any mechanical works, projects or plants, of over 2,100 kW, he must be duly licensed [ ]. ***Answer: C*** K. ME L. CPM M. PME N. CPM, ME and PME 377. Maximum plant capacity in which a licensed ME is allowed to operate, Tend or maintain. ### Answer: C O. 300 kW P. 1000 kW Q. 2000 kW R. 3000 kW 378. For a mechanical plant with capacity of 300 kW or over but not more than 2000 kW, the personnel required must be at least. ***Answer: C*** S. ME T. PME U. CPM, ME & PME V. PME & ME 379. The only accredited national organization for Mechanical Engineers. ***Answer: C*** W. PME X. NME Y. PSME Z. POME 380. Divide 1/8 to 8. ***Answer: A*** A. 1 B. 8 C. 2 D. 64 381. Which of the following product of combustion that has a property of resilience? ***Answer: C*** E. grease F. graphite electrode G. rubber H. graphite powder