Design - Elements 1-5 PDF

C. Impact test D. Izod test Answer: B 97. SAE 51XXX belongs to the _______ steel family. A. Carbon B. Chromium C. Manganese D. Nickel Answer: B 98. In itself, it is a lubricant and usually one of the important...

C. Impact test D. Izod test Answer: B 97. SAE 51XXX belongs to the _______ steel family. A. Carbon B. Chromium C. Manganese D. Nickel Answer: B 98. In itself, it is a lubricant and usually one of the important elements in casting non- ferrous metals like bronze, for example. A. Antimony B. Babbitt C. Lead D. Zinc Answer: C 99. Gasket material, which should avoid hot liquid/steam applications? A. Asbestos fiber B. Nylon fiber C. Rubberized D. Wool Answer: C 100. The same material properties all over/direction and at any particular point in a structural member is: A. Heterogeneous B. Homogeneous C. Isentropic D. Isotropic Answer: D ELEMENTS 6 1. The recommended value of the rake angle for machining aluminum with cutting tools made up of cemented carbide tool A. 5o B. 10o o C. 15 D. 25o Answer: C 2. Laser beam machining process is used to machine A. Thicker materials B. Thinner materials C. Heavier materials D. Stronger materials Answer: B 3. The size of abrasive grains in abrasive a jet machining varies from A. 60 to 100 microns B. 10 to 50 microns C. 1 to 5 microns D. 20 to 40 microns Answer: B 4. In collet, the included angle of taper is usually A. 10o B. 20o o C. 30 D. 40o Answer: C 5. Straight fluted drill are used to drill ______ materials. A. Soft B. Hard C. Thin D. Thick Answer: A 6. Twist drills are made usually considered suitable machining holes having a length  less than A. Two times their diameter B. Five times their diameter C. Ten times their diameter D. Twenty times their diameter Answer: B 7. A hard grade grinding wheel is suitable for grinding A. Hard materials B. Soft materials C. Both materials D. None of these Answer: B 8. The relative motion of work piece in planning is A. Rotary B. Translatory C. Rotary and translatory D. None of these Answer: B 9. The accuracy obtained by the grinding process can be of the order of A. 0.25 mm B. 0.025 mm C. 0.0025 mm D. 0.00025 mm Answer: D 10. In quick return mechanism of shaping machine, the ram stroke length is proportional to A. Slotter arm length B. Crank length C. Ram length D. None of these Answer: B 11. A white metal, almost as bright as silver and is malleable and ductile and can be welded. A. Nickel B. Aluminum C. White iron D. Lead Answer: A 12. It is a silver dull, soft metal and the second lightest of all metals used in the industry. A. Nickel B. Aluminum C. White iron D. Lead Answer: B 13. The least among iron ores for it contains many impurities, poor in iron content and commonly used in England. A. Hematite B. Magnetite C. Limanite D. Siderite Answer: D 14. Which of the following is not considered to be precious metal? A. Silver B. Gold C. Platinum D. Steel Answer: D 15. It is an alloy of copper and zinc. It is approximately 1/3 zinc and 2/3 copper. A. Brass B. Bronze C. Muntz metal D. Silver Answer: A 16. It is a copper tin alloy and is named either bell metal or brown metal. A. Brass B. Bronze  C. Muntz metal D. Silver Answer: B 17. It is a furnace that converts pig iron steel by oxidizing out the surplus carbon and using oxygen by throwing raw iron ore into the furnace. A. Open-hearth furnace B. Electric furnace C. Cupola D. Bessemer Answer: A 18. The most commonly used series in the bulk production of bolts, screws, nuts and other general applications in the coarse-thread series. A. UNC B. UNF C. White iron D. Lead Answer: A 19. What is the actual torque ratio of a gear set divided by its gear ratio? A. Approach ratio B. Clearance C. Contact ratio D. Efficiency Answer: D 20. Which of the following has low coefficient of expansion, corrosion resistant, weak in strength and used for non-ferrous application as an alloying element? A. Aluminum B. Aluminum oxide C. Copper oxide D. Copper Answer: A 21. The usual ratio of forward and return stroke in quick return mechanism of shaping machine is A. 3:2 B. 3:1 C. 3:4 D. 3:5 Answer: A 22. The amount of metal removed by honing process is less than A. 0.125 mm B. 0.225 mm C. 0.325 mm D. 0.425 mm Answer: A 23. In ECM process thermal current requirement is A. 100 amps/cycle of work piece area B. 200 amps/cycle of work piece area C. 500 amps/cycle of work piece area D. 800 amps/cycle of work piece area Answer: D 24. The voltage applied between tool (cathode) and work piece (anode) in ECM process is A. 30 – 50 V B. 60 – 90V C. 3 – 20 V D. None of these Answer: C 25. The diameter (D) of a plain milling cutter is approximately related to arbor diameter (d) as A. D = 1.5d to 2d B. D = 2.5d to 3d C. D = 4.5d to 6d D. D = 5.5d to 8d Answer: B 26. The type and number of bearings to be used for spindles of machine tool depend on the A. Type of spindle B. Type of machine tool C. Load on the bearing D. None of these Answer: C 27. HSS cutting tools are generally provided with A. Positive rake angle B. Negative rake angle C. Positive cutting edge angle D. Negative cutting edge angle Answer: A 28. Cemented carbide and ceramic cutting tools are usually provided with A. Positive rake angle B. Negative rake angle C. Positive cutting edge angle D. Negative cutting edge angle Answer: B 29. Coefficient of friction in anti-friction guide ways is: A. High B. Low C. Medium D. None of these Answer: B 30. Nitriding process of surface treatment for steel tools is used for taking A. Light cuts B. Heavy cuts C. Medium cuts D. None of these Answer: A 31. Which of the following material(s) is recommended for large sprocket of large speed ratio and having fewer engagement? A. Nickel-chromium steel B. Copper C. Cast iron D. Aluminum Answer: C 32. In which of the following carrying capacity where roller bearing is utilized better than ball bearing? A. Heavy load B. High temperature load C. Low load D. Reversing load Answer: A 33. Which of the following materials having thermal expansion of about 10 times higher than those of metals and has more heat generated during machining? A. Aluminum B. Asbestos C. Plastic D. PVC Answer: C 34. To avoid scoring in the bearing surface and the shaft due to contamination/absorption of the fine dirt in the bearing during operation/lubrication the bearing material to apply should have good ____ properties. A. Anti-scoring B. Corrosion resistance conformability C. Corrosion resistance D. Embeddability Answer: D 35. What do impact tests measure? A. Compactness B. Ductility C. Plasticity D. Toughness Answer: D 36. Which of the following types of gear transmit power at a certain angle? A. Bevel B. Helix C. Herringbone D. Spur Answer: A 37. Which of the following gasket material is not used for high temperature? A. Asbestos B. Plastic nylon C. Rubberized D. Wool Answer: C 38. How do you call a plane perpendicular to the gear axis? A. Normal plane B. Pitch plane C. Plane of rotation D. Radius of gyration Answer: C 39. Which of the following is the specification of molybdenum alloy? A. SAE 3XXX B. SAE 4XXX C. SAE 5XXX D. SAE 6XXX Answer: B 40. Which of the following is abundant ferrous metals? A. Sulfur B. Phosphorus C. Manganese D. Carbon Answer: D 41. At very low cutting speeds the tool wear is due to A. Plowing action B. Transfer C. Material D. Temperature Answer: A 42. Are mixture of lard, cotton seed or rape-seed oils and mineral oils. A. Cutting oils B. Cooling oils C. Heating oils D. Emulsion Answer: A 43. How is aluminum work piece marked? A. Ball pen B. Lead pencil C. Crayon D. Chalk Answer: B 44. How is the height of a bench vice adjusted? A. By using a wooden plate form B. By using a wooden packing piece under the vice base C. By using a vice adjusting fixture D. All of these Answer: D 45. What is the material of hacksaw blade? A. High carbon steel B. High speed steel C. Low tungsten steel D. Any of these Answer: D 46. Why hacksaw blade teeth get dull? A. Coarse pitched blade is used on hard metal B. Too much speed and pressure  C. Pressure is not released in return stroke D. Any of these Answer: D 47. Files are classified according to A. Size or length B. Shape C. Grade and cut D. All of these Answer: D 48. How are rivets made? A. Cold pressing B. Rolling C. Drawing D. None of these Answer: A 49. It is a case hardening process in which work piece is heated in a stream of ammonia at 500 to 5500C. A. Quenching B. Annealing C. Tempering D. Nitriding Answer: D 50. It is used to measure gap between two mating parts to set the job and machine in alignment and to measure clearance piston and cylinder in automobiles. A. Compound gauge B. Feeler gauge C. Inspection gauge D. Workshop gauge Answer: B 51. What machine is used to flatten surface on a vertical, horizontal or even angular plane? A. Shaper machine B. Power saw C. Boring machine D. Drilling machine Answer: A 52. All of these are classifications of iron ore; except what? A. Magnetite B. Hematite C. Siderite D. Sulfurite Answer: D 53. It refers to the internal resistance of a material to being deformed and is measured in terms of the applied load. A. Stress B. Strain C. Ductility D. Malleability Answer: A 54. The property of a material which resists forces acting to pull the material apart. A. Tensile strength B. Compressive strength C. Bending stress D. Torsional strength Answer: A 55. The property of a material which resists forces from causing a member to bend or deflect in the direction in which the load is applied. A. Bending strength B. Compressive strength C. Tensile strength D. Torsional strength Answer: A 56. The property of a material to resist various kinds of rapidly alternating stress. A. Fatigue strength B. Bending strength  C. Compressive strength D. Impact strength Answer: A 57. The ability of a material to resist loads that are applied suddenly and often at high velocity. A. Fatigue strength B. Bending strength C. Compressive strength D. Impact strength Answer: D 58. The ability of the material to stretch, bend or twist without breaking or cracking. A. Ductility B. Malleability C. Hardness D. Compressibility Answer: A 59. Which of the following is considered to be the father of all machine tool? A. Lathe machine B. Boring machine C. Drilling machine D. Milling machine Answer: A 60. It is the ability of the material to resist loads that are applied suddenly and often at high velocity. A. Fatigue strength B. Impact strength C. Hardness D. Shock strength Answer: B 61. The movement of belt upon the face of rim or outer surface of the driver and driven pulleys within the area of arc of contact. A. Slip B. Creep C. Interference D. Crowning Answer: B 62. The temperature at which an oil gives off sufficient vapor without actually setting fire to the oil. A. Flash point B. Fire point C. Pour point D. Cloud point Answer: A 63. It is the process by which the length of a work piece is reduced. A. Drawing B. Drifting C. Jumping D. Upsetting Answer: C 64. It cannot be forged because it will break if heated and beaten by hammer A. High speed steel B. Tool steel C. Carbon steel D. Cast iron Answer: D 65. It is a process of enlarging and smoothing the punched hole by means of tapered drifts of various sizes and shapes. A. Drifting B. Drawing C. Upsetting D. Jumping Answer: A 66. It is the process by which the length of a work piece is increased by reducing its cross-sectional area. A. Flattening B. Drawing out  C. Swaging D. Jumping Answer: B 67. Shaper tools are made of what type of material? A. Brass B. Bronze C. High speed steel D. Babbit Answer: C 68. A _____ is a reciprocating type tool used for machining flat, cylindrical and irregular surfaces. A. Shaper B. Planer C. Puncher D. Slotter Answer: D 69. An operation to enlarge the previous drilled hole A. Drilling B. Boring C. Reaming D. Broaching Answer: B 70. An operation to make smaller hole in exact center for lathe center. A. Broaching B. Reaming C. Counter boring D. Center drilling Answer: D 71. A steel of carbon range of 0.05 to 0.03 percent is considered as what type of steel? A. Low carbon steel B. High carbon steel C. Medium carbon steel D. Alloyed steel Answer: A 72. A steel carbon range of 0.30 to 0.45 percent is considered as what type of steel? A. Low carbon steel B. High carbon steel C. Medium carbon steel D. Alloyed steel Answer: C 73. A steel of carbon range of 0.45 to 0.75 percent is considered as what type of steel? A. Low carbon steel B. High carbon steel C. Medium carbon steel D. Alloyed steel Answer: B 74. A steel of carbon range of 0.75 to 1.7 percent is considered as what type of steel? A. Low carbon steel B. High carbon steel C. Medium carbon steel D. Very high carbon steel Answer: D 75. Which of the following alloying elements of steel will tend to increase its strength without decreasing its toughness or ductility and with its large quantities the steel become tough but develop high resistance to corrosion and shock? A. Chromium B. Manganese C. Molybdenum D. Nickel Answer: D 76. Which of the following alloying elements of steel will produce the greatest hardening effect like carbon and at the same time reduces the enlargement of its grain structure? A. Chromium B. Manganese C. Molybdenum D. Nickel Answer: C 77. Which of the following alloying elements of steel will produce fine grain structure and promotes greater toughness and ductility? A. Chromium B. Manganese C. Molybdenum D. Nickel Answer: B 78. Which of the following alloying elements of steel which makes it extremely hard and resistance to wear without making it brittle? A. Chromium B. Manganese C. Molybdenum D. Nickel Answer: A 79. It is the element used mostly in steels designed for metal cutting tools. The steels added by this element are tough, hard and very resistant to wear. A. Chromium B. Tungsten C. Molybdenum D. Nickel Answer: B 80. It is the element whose chief function is to strengthen the ferrite. It is used with tungsten to develop red hardness or the ability to remain hard when red hot. A. Chromium B. Cobalt C. Molybdenum D. Nickel Answer: B 81. It is the operation of bevelling the mouth of a hole A. Counter sinking B. Counter boring C. Spot facing D. Counter boring Answer: A 82. It is the operation of smoothing and squaring the surface around the hole A. Reaming B. Counter sinking C. Spot facing D. Counter boring Answer: C 83. The size of abrasive grains produced by crushing process is called A. Grade B. Grit C. Peebles D. None of these Answer: B 84. It is the combination of iron, carbon and other alloying elements. A. Cast iron B. Brass C. Carbon steel D. Alloy steel Answer: D 85. The main purpose of _____ is to resist wear and unable it to cut the other metal. A. Tempering B. Hardening C. Quenching D. Normalizing Answer: B 86. Lip clearance angle for drilling soft materials should be _____ that for drilling hard materials. A. Less than B. Equal to C. More than D. Zero Answer: C 87. It is also known as slab peripheral milling A. Form milling B. Climb milling C. Convex milling D. Plain milling Answer: D 88. In ______ the tool is released in return stroke. A. Shaper B. Planer C. Slotter D. Reamer Answer: A 89. It is the process of driving the periphery of the job in degrees. A. Direct indexing B. Plain indexing C. Differential indexing D. Angular indexing Answer: D 90. It is also known as conventional milling in which the rotation of the cutter is in a direction opposite to the direction of the table movement. A. Down milling B. Up milling C. Straddle milling D. Gang milling Answer: B 91. It is also known as strain drawing. It is the process whereby certain degree of hardness is sacrificed in order to reduce brittleness and increase the toughness or steel tool. A. Tempering B. Normalizing C. Annealing D. Quenching Answer: A 92. It is the heat treatment of steel that produces extremely hard surface. The process consists of exposing the steel to hot ammonia gas some for hours. A. Nitriding B. Cyaniding C. Carburizing D. Ammonia bath Answer: A 93. How do you call the metals that contain large amount of carbon content? A. Ferrous metals B. Non-ferrous metals C. Base metals D. Precious metals Answer: A 94. All these are basic kinds of cast iron, EXCEPT: A. Gray iron B. Malleable iron C. White iron D. Red iron Answer: D 95. Which of the following basic kind of cast iron is harder and more difficult to machine because it contains carbon in carbide state? A. Gray iron B. Malleable iron C. White iron D. Wrought iron Answer: C 96. How do you call metals that have no carbon content? A. Ferrous metals B. Malleable iron C. Non-ferrous metals D. White iron Answer: C 97. Which of the following is the type of cast iron that can stand more shock and  blows than regular cast iron? A. Nodular iron B. Malleable iron C. Wrought iron D. Gray iron Answer: A 98. It is the metal of almost pure iron, ductile and very tough. It can be hammered and shaped at high temperature. It has a fibrous structure because of the presence of slag. A. Nodular iron B. Malleable iron C. Wrought iron D. Gray iron Answer: B 99. A type of ferrous metal which is formed by remelting pig iron and scrap iron in a cupola furnace. It is brittle and usually gray in color and commonly used in making casting. A. Cast iron B. Malleable iron C. Wrought iron D. Gray iron Answer: A 100. A classification of iron ore which contains 70% iron when pure and 50% iron when mined. A. Hematite B. Magnetite C. Limanite D. Siderite Answer: A ELEMENTS 7 1. Hardening the surface of iron – based alloys by heating then below the melting point in contact with a carbonaceous substance. A. Carburizing B. Normalizing C. Mar tempering D. Hardening Answer: A 2. A special metal formed when two or more metals are melted together. A. Monel B. Alloy C. Solder D. Hastalloy Answer: B 3. Subjecting a substance to a high temperature below the fusion point usually to make it friable. A. Calcination B. Fusion C. Boiling D. Super heating Answer: A 4. Substances having sufficient carbon and/or hydrogen for chemical oxidation to produce exothermally, worthwhile quantities of heat. A. Lubrication B. Graphite C. Grease D. Fuels Answer: D 5. The principal material used in high production metal working tools. A. Hyper – Eutectoid B. High speed steel C. Lead D. High speed carbon Answer: B 6. The softening of metal by heat treatment and most commonly consist of heating the metal up to near motion state and then cooling it very slowly. A. Annealing B. Indexing C. Knurling D. Soldering Answer: A 7. The operation of cooling a heated peace of work rapidly by dipping it n water, brine or oil. A. Quenching B. Annealing C. Tempering D. Normalizing Answer: A 8. A metallic elements and only metal that is liquid at ordinary temperature. A. Aluminum B. Mercury C. Zirconium D. Zinc Answer: B 9. A metallic element of copper – tin alloy. A. Aluminum B. Brass C. Bronze D. Chromium Answer: C 10. An alloy of copper and zinc. A. Aluminum B. Brass C. Bronze D. Chromium Answer: B 11. Which of the following is the allowable tensile strength of the steel plates? A. 396.41 N/m2 B. 379.31 N/m2 2 C. 296.12 N/m D. 310.11 N/m2 Answer: A 12. Which of the following standard SAE designation of manganese steel? A. 13xx B. 11xx C. 10xx D. 8xx Answer: A 13. Compute the torque received by the motor shaft running at 4250 rpm. Transmitting 11 Hp, through a 10 in diameter 20 0 involute gear. The shaft is supported by ball bearings at both ends and the gear is fixed at the middle of 8” shaft length. A. 163 in. lb B. 132 in. lb C. 167 in. lb D. 138 in. lb Answer: A 14. The SAE 2340 shafting contains how many percent nickel? A. 3.85 Ni B. 3.25 to 3.75% Ni C. 4% Ni D. 3.84% Ni Answer: B 15. Which of the following standard SAE designation for chromium steel? A. 92xx B. 3xxx C. 5xxx D. 11xx Answer: C 16. In general, alloys with high nickel content retain toughness to quiet low  temperatures up to how many degrees Fahrenheit? A. – 380 B. – 260 C. – 400 D. – 320 Answer: D 17. The length of the hub should not be made lesser than the face width of the gear. Hub lengths usually vary from 1.25D to 2D where D is the shaft diameter. What should be the reasonable diameter of steel hub? A. 2D B. 1.55D C. 1.8D D. 1.20D Answer: C 18. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of how many degree/foot of length? A. 0.4 to 1 B. 0.08 to 1 C. 0.01 to 1 D. 0.6 to 1 Answer: B 19. If the pitch of a screw is 2/9 find the thread per inch. A. 0.34 B. 5.4 C. 4.5 D. 17 Answer: C 20. Steel spring material is usually hardened from 400 to 500 BHN and the carbon content is in the range of how many percent? A. 0.50 to 0.90% B. 0.45 to 0.48 C. 0.96 to 0.97 D. All of these Answer: A 21. Which of the following is not a classification of iron ore? A. Hematite B. Magnetite C. Sulfurite D. Siderite Answer: C 22. A soft yellow metal, known since ancient times as a precious metal which all materials values. A. Solid’s B. Bronze C. Gold D. Austenite Answer: C 23. An amorphous solid may be fusing silica with a basic oxide. A. Pearlite B. Rock C. Silicon D. Glass Answer: D 24. A fine grained salty silica rock used for sharpening edge tools A. Eutectoid B. Austenite C. Oilstone D. Pearlite Answer: C 25. A highly transparent and exceedingly hard crystalline stone of almost pure carbon is called A. Gold B. Diamond C. Bronze D. Crystalline Answer: B 26. The common deoxidizer and cleanser of steel forming oxides and sulfates that are  carried off in the slag. A. Manganese B. Carbon C. Tungsten D. Sulfur Answer: A 27. An alloy of copper, tin and small amount of phosphorous. A. Chromium B. Bronze C. Brass D. Aluminum Answer: B 28. The material used in high speed processes. A. High speed B. Chromium C. Cast iron D. Carbon steel Answer: A 29. A material that can wear away a substance softer than itself is called. A. Abrasive B. Corrosive C. Tungsten D. Alloy Answer: A 30. The process of heating a piece of steel to a temperature within or above critical range and cooling rapidly. A. Normalizing B. Hardening C. Annealing D. Tempering Answer: B 31. 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. A. 3.75 B. 5 C. 4 D. 51/2 Answer: A 32. Plain carbon steel standard designation SAE _____. A. 6xxx B. 10xx C. 13xx D. 2xxx Answer: B 33. If the inertia is 90 lb. ft2 and the speed of the driven shaft is to be increased from 0 to 2500 rpm in 5 seconds, shaft material is of SAE 4140 with yield strength of 110000 lbs./in.2, find the clutch starting torque in in. – lb ft. A. 159 B. 146 C. 128 D. 191 Answer: B 34. How many 5/16 inch holes can be punch in one motion in a steel plate made of SAE 1010 steel 7/16 inch thick using a force of 55 tons. The ultimate strength for shear is 50 ksi and use 2 factor of safety. A. 5.8 B. 5 C. 3.7 D. 6.5 Answer: B 35. Which of the following cannot be used in drilling machine? A. Reaming B. Lapping C. Spot facing D. Broaching Answer: C 36. A kilowatt is equal to: A. 8851.2 in. – lb/sec B. 57 BTU/min. C. 1140 joule/sec. D. 44.200 ft. – lb./min. Answer: B 37. Molybdenum-chromium-nickel steel designation. A. SAE 48xx B. SAE 56xx C. SAE 43xx D. SAE 46xx Answer: C 38. Single forces which produces the same effect upon a mass replacing two or more forces acting together is called: A. Vector B. Component of forces C. Resultant D. Resolution Answer: C 39. Permissible variation of the manufactured/machined dimension is called: A. Intolerance fits B. Allowance C. Deviation D. Tolerance Answer: D 40. Peculiar strength of the metal to resist being crushed. A. Shear strength B. Compressive strength C. Ultimate strength D. Elastic limit Answer: B 41. The process of checking or producing checkers on the surface of a piece by rolling checkered depression into the surface is called. A. Knurling B. Hemming C. Breading D. Embossing Answer: A 42. A material used in softening a piece of metal that is too hard to machine and is done by heating steel slowly above the usual hardening temperature keeping it at the heat for ½ to 2 hours then cooling slowly, preferably in a furnace. A. Broaching B. Quenching C. Normalizing D. Annealing Answer: D 43. A manganese steel containing approximately 0.20% carbon. A. SAE 1320 B. SAE 1230 C. SAE 2340 D. SAE 4230 Answer: A 44. Heating to some 1000F above the transformation range with subsequent cooling to below that range in still air at room temperature to produce uniform structure of metal is termed as. A. Annealing B. Hardening C. Normalizing D. Tempering Answer: C 45. Heating to a sub-critical temperature about 1,100oF to 1300oF and holding at that temperature for a suitable time for the purpose of reducing internal residual stresses is called  A. Annealing B. Hardening C. Tempering D. Stress relieving Answer: D 46. Reheating to a temperature below the transformation range, followed by any desired rate of cooling to attain the desired properties of the metal. A. Annealing B. Hardening C. Tempering D. Stress relieving Answer: C 47. The effect of alloying zinc to copper is A. To increase hardness B. To increase strength and ductility if added up to 10 – 30% C. To impart free-machining properties D. To improve hardness and strength Answer: B 48. Polyesters belong to the group of: A. Phenolics B. Thermoplastic plastics C. Thermo setting plastics D. All of these Answer: C 49. The imperfection in the crystal structure of metal is known as: A. Dislocation B. Fracture C. Impurity D. Slip Answer: A 50. The most important element that controls the physical properties of steel is: A. Carbon B. Chromium C. Silicon D. Tungsten Answer: A 51. What pressure is required for punching a hole 2” dia thru ¼” steel plates? A. 40 tons B. 45 tons C. 50 tons D. 35 tons Answer: A 52. What is the working strength of a 2” bolt which is screwed up tightly in a packed joint when the allowable working stress is 12,000 psi. A. 20.4 ksi B. 23.4 ksi C. 22.4 ksi D. 18 ksi Answer: A 53. Determine the bursting steam pressure of a steel shell with diameter of 10 inches and made of ¼” thick steel plate. The joint efficiency is at 60% and the tensile strength is 60 ksi. A. 4200 psi B. 42.8 ksi C. 10.5 ksi D. 8500 psi Answer: A 54. Commonly used by steel melter as deoxidizer because of its easy availability and cheap price. A. Silicon B. Zinc C. Aluminum D. Manganese Answer: C 55. Curve 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. A. Axial plane B. Arc of recess C. Involute D. Arc of action Answer: C 56. Resultant of two or more component forces is called: A. Composition of forces B. Component C. Resultant D. Collinear of forces Answer: A 57. A material having a high electrical resistance and should not be used for conductor of electric current. A. Alloyed magnesium B. Nickel C. Silicon base alloy D. Zinc Answer: B 58. It improves red hardness of steel. A. Silicon B. Cobalt C. Lead D. Manganese Answer: B 59. Designated pipe color used in communication. A. Silver gray B. Bare C. Aluminum gray D. White Answer: D 60. The design stress and factor of safety are related in the following manner. A. Design stress = ultimate stress/factor of safety B. Ultimate stress = factor of safety/design stress plus concentration factor C. Factor of safety = Design stress/ultimate stress D. Design stress = factor of safety/times stress concentration factor Answer: A 61. The process commonly used over thermo-plastic materials is A. Cold forming B. Die casting C. Injection molding D. Shell molding Answer: C 62. A space lattice found in alpha – iron is called the A. Body centered cubic space lattice B. Close packed hexagonal space lattice C. Face centered cubic space lattice D. None of these Answer: A 63. A unit cell contains nine atoms is known as the A. Body centered cubic space lattice B. Close packed hexagonal space lattice C. Face centered cubic space lattice D. None of these Answer: A 64. A knoop indenter is a diamond ground to a ________.  A. Cylindrical form B. Needle form C. Prismoidal from D. Pyramidal form Answer: D 65. Which of the following timber is used for sports goods? A. Deodar B. Mahogany C. Mulberry D. Sal Answer: C 66. Super conductors A. Are non – crystalline B. Are the purest forms of metal C. Are the densest materials is D. Exist at temperature below 10oK Answer: D 67. Select the that has the highest specific gravity. A. Aluminum B. Brass C. High carbon steel D. Lead Answer: D 68. For heavy loads in aircraft bearings the material used with lead to reduce the risk of seizure is A. Iron B. Silver C. Tin D. Zinc Answer: B 69. Age – hardening is related with: A. Cast iron B. Duralumin C. German silver D. Stainless steel Answer: B 70. Which of the following has highest specific strength of all structural materials? A. Chromium alloys B. Magnesium alloys C. Titanium alloys D. None of these Answer: C 71. Not adaptable to welding due to low tensile strength and poor ductility etc. A. Copper parts B. Aluminum parts C. Cast iron materials D. Bronze parts Answer: B 72. Bearing surface that completely surrounds the journal is also called: A. Offset bearing B. Centrally loaded bearing C. Full bearing D. Babbitt bearing Answer: C 73. The purpose of lubrication is as mentioned, except: A. To lighten the load B. Prevent adhesion C. Prevent corrosion/oxidation D. Cool the moving elements Answer: B 74. Tools usually used in wood pattern making in foundry shop. A. Saws and chisels B. Knives and drills C. Band saw D. Drill machine Answer: A 75. It is a plane perpendicular to the axial plane and to the pitch plane in gears the parallel axes and the plane of rotation coincides.  A. Tangent plane B. Tranverse C. Straight plane D. Reference plane Answer: B 76. A 36 tooth pinion with a turning speed of 300 rpm drives 120 tooth gear of 14 ½ 0 d involute full depth pressure angle. What would be the speed of the driven gear? A. 1000 rpm B. 90 rpm C. 100 rpm D. 140 rpm Answer: B 77. Several forces which can be combined are called: A. Resultants B. Components C. Composition of forces D. Collinear forces Answer: B 78. The surface along the fillet curves or between the fillets radius of the two adjacent teeth or a gear. A. Bottom land B. Fillet C. Flank D. Top land Answer: A 79. Ideal herringbone gear helix is in the range of: A. Bottom land B. Fillet C. Flank D. Top land Answer: A 80. Ideal herringbone gear helix is in the range of: A. 30 to 45 B. 25 to 30 C. 35 to 50 D. 15 to 20 Answer: A 81. Addition to lead and bismuth to aluminum will produce: A. An improvement of casting characteristics B. An improvement of corrosion resistance C. One of the best known age and precipitation hardening system D. An improvement in machinability Answer: D 82. Hastalloy contains: A. Aluminum and nickel B. Copper and aluminum C. Nickel and copper D. Nickel and molybdenum Answer: D 83. In compression, a prism of brittle material will break. A. By forming a bulge B. By shearing along oblique plane C. In a direction along at the direction of load D. Into large number of piece Answer: B 84. The maximum hardenability of any steel depends on _______. A. The alloying elements present B. The carbon content C. The chemical composition D. The grain size Answer: B 85. Steel with 0.80% carbon and 100% pearlite is known as  A. Austenite B. Eutectoid C. Hyper – Eutectoid D. Solidous Answer: B 86. Substance that can increase the machinability of steel A. Phosphorous B. Phosphorous and aluminum C. Silicon and sulfur D. Sulfur graphite and aluminum Answer: A 87. Compressive strength of gray cast iron in tons per cm 2 is of the order of: A. 3 – 5 B. 5 – 7 C. 7 – 10 D. 15 – 22 Answer: B 88. The presence of sulphur in pig iron makes ______. A. It brittle B. It easily machinable C. It hard D. The casting unsound Answer: D 89. The hardness of steel increase it contains ______. A. Austenite B. Pearlite C. Stalactite D. Martensite Answer: D 90. Which one is different from the group? A. Cyaniding B. Nitriding C. Flame hardening D. Electroplating Answer: D 91. A three extension coil spring are hooked in series that support a single weight of 1000 kgs. The first spring is rated at 0.400 kg/mm and the other 2 lower spring is rated at.64 kg/in. Compute the total deflection. A. 263 mm B. 156 mm C. 268 mm D. None of these Answer: D 92. The lack of backlash in a spur gear design/operation may result to: A. Overloading B. All of these C. Jamming D. Overheating Answer: B 93. The distance from a point on a screw thread to a corresponding point on the next thread measure along the axis. A. Flank B. Crest C. Lead D. Pitch Answer: D 94. As recommended the center to center distance between a sprockets should not be less than ____ times the bigger sprocket. A. 2.216 B. 1 ½ C. 1 ¾ D. 2.59 Answer: B 95. Machine shop instrument for checking the flatness of plane surface to 10ths of thousandths of a centimeter. A. Blade type micrometer B. Planimeter  C. Dial caliper D. Micrometer Answer: B 96. Molybdenum steel standard designation SAE. A. 88xx B. 40 xx C. 48xx D. 46xx Answer: B 97. Also called eccentrically loaded bearing is: A. Full bearings B. Partial bearings C. Offset bearings D. Fitted bearings Answer: C 98. In the selection of wire rope, regular lay means wires and strands are arranged in the following manner. A. Twisted in the same direction B. Twisted in opposite direction C. Twisted in any direction D. Twisted in along direction Answer: B 99. 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: A. Helix angle B. Angle of obliquity C. Angle of recess D. Arc of action Answer: B 100. Instantaneous center is also called: A. Centro B. Virtual center C. Rotopole D. All of these Answer: B ELEMENTS 8 1. It is also known as climb milling in which the rotation of the cutter and the movement of the table is in the same direction. A. Down milling B. Up milling C. Straddle milling D. Gang milling Answer: A 2. The _______ is a machine tool used to remove mtal from a work piece to give it the required shape and size. A. Shaper B. Planer C. Lathe D. Grinder Answer: C 3. It is the method of grinding cylindrical surfaces. A. Centerless grinding B. Plunge-cut grinding C. Through feed grinding D. None of these Answer: A 4. It is the angle between the side cutting edge and the longitudinal axis of the tool. A. Side cutting edge angle B. End cutting edge angle  C. Side relief angle D. End relief angle Answer: A 5. It is a surface finishing process and is used to produce a lustrous surface of attractive appearance. A. Polishing B. Buffing C. Lapping D. Glazing Answer: B 6. It consists of surface irregularities , which result from the various manufacturing process. A. Lay B. Waiveness C. Flaws D. Roughness Answer: D 7. A _____ is formed when a shaft rotates in a bush, lines of the bore of a housing. A. Ball bearing B. Roller bearing C. Plain bearing D. Needle bearing Answer: C 8. CNC in machine shop means A. Computer Number Control B. Computer Numerical Control C. Communication Network control D. Computer Network Center Answer: B 9. It is the time lost due to break downs, waiting for tools, minor accident etc. A. Set up time B. Handling time C. Machining time D. Down time Answer: D 10. Refers to the process of separating or removing the burning of combustible material from the neighborhood of the fire. A. Starvation B. Blanketing C. Cooling D. None of these Answer: A 11. What is the stress to strain ratio within the elastic limit? A. Elastic limit B. Elasticity C. Modulus of elasticity D. Compressive ratio Answer: C 12. 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? A. It does not follow Hooke’s law B. It is elastic C. It has high modules of elasticity D. It is plastic Answer: B 13. Allowance added in the casting pattern to compensate for the contraction of metal. A. Tapering allowance B. Finish allowance C. Shrinkage allowance D. Draft pattern Answer: C 14. Ratio of the angle of action to the pitch angle. A. Contact ratio B. Ratio of gearing C. Approach ratio D. Module Answer: A 15. General purpose grade of steel used for broiler plate, structurals etc. usually with carbon content of: A. 0.20 to 0.30%C B. 0.35 to 0.0%C C. 0.15 to 0.25%C D. All of these Answer: A 16. The angle made by the helix of the thread (in a straight thread) at the pitch diameter with a plane perpendicular to the axis called: A. Angle of thread B. Lead angle C. Truncation D. Lead Answer: B 17. The principle materials used in the production of metal working tools. A. High carbon steel B. Titanium, phosphorus C. Tungsten, silicon, hadfield Mn D. Vanadium, chromium, molybdenum Answer: A 18. In the interest of design simplification and good kinematic compromise bevel gears adopted a standard pressure angle of _____ degrees. A. 200 involute stub B. 141/2 involute full depth C. 200 D. 171/2 Answer: C 19. The property of material that relates the lateral strain to longitudinal strain. A. Stress B. Poisson’s ratio C. Strain D. Endurance limit Answer: B 20. It is generally recommended and normal for a designer to add a hunting tooth to evenly distribute the wear on meshing teeth like a 53 teeth gears mesh with 30 teeth pinion. Find the rotation of pinion to mesh with same pair of teeth again. A. 120 B. 61 C. 81 D. 53 Answer: D 21. When does a chisel get blunt? A. When it is properly heat treated B. When it is not properly heat treated C. When it is properly tempered D. When it is not properly tempered Answer: B 22. What is it necessary to provide tolerance? A. It saves the labor charges B. It saves the material from wastage C. It saves the time D. All of these Answer: D 23. It is done then and there by adjusting or repairing the faults come in notice during the work. A. Preventive maintenance B. Predictive maintenance C. Routine maintenance D. Corrective maintenance Answer: C 24. A _______ is used between the cutting tool and work piece to minimize the friction heat. A. lubricant B. Coolant C. Water D. Alcohol Answer: B 25. Which of the following is NOT a function of bearings A. To support the shaft B. To guide the shaft C. To give free rotation to the shaft D. To transmit power Answer: D 26. It is a process of cleaning the face of grinding wheel by means of a dresser for removing the glazing and loading of wheel and to improve the cutting action of a wheel. A. Dressing B. Polishing C. Truing D. Lapping Answer: A 27. What should be the top rake angle to cut brass? A. 00 B. 150 C. 300 D. 450 Answer: A 28. It is a long, tapered punch used for loosening straight pins, taper pins, rivets and other small parts being disassembled. A. Drive-pin punch B. Hand punch C. Drift punch D. Center punch Answer: C 29. A tool used for turning nuts or bolts. A. Plier B. Wrench C. Long nose D. C – Clamp Answer: B 30. A sharp pointed steel tool used to scribe lines on metal being laid out. A. Divider B. Scriber C. Trammel D. Hermaphrodite calliper Answer: B 31. The shaft whose torque varies from 2000 to 6000 in lbs has 1 ½ in. in diameter and 60000 psi yield strength. Compute for the shaft mean average stress. A. 6036 psi B. 5162 psi C. 6810 psi D. 5550 psi Answer: A 32. The angle made by the helix of the thread (In a straight thread) at the ptch diameter with a plane perpendicular to the axis is called: A. Lead angle B. Lead C. Trunction D. Angle of thread Answer: A 33. The rule of thumb in journal bearing design; the clearance ratio/clearance should  be: A. 0.0090 B. 0.0010 C. 0.0042 D. 0.00120 Answer: B 34. The moment of inertia is a rectangle whose base is “b” height “h” about its base is: A. bh3/4 B. bh3/24 3 C. bh /12 D. bh3/3 Answer: D 35. Cold rolled shafting is not available in diameter larger than: A. 6 inches B. 6 ½ inches C. 5 inches D. 5 ½ inches Answer: C 36. Height of tooth above pitch circle or the radial distance between pitch circle and top land of the tooth. A. Top root B. Land C. Addendum D. Hunting tooth Answer: C 37. The function of clutch in the machine tool is: A. Lowering of drive speed B. To disconnect or connect at will the drive C. Alignment of drive shaft D. To insure that two shaft line up at high speed Answer: B 38. A resulting forces that replace two or more forces acting together. A. Vector B. Resultant C. Couple D. Equilibrium Answer: B 39. Stress relieving is also _____ for the purpose of reducing the internal stresses of steel material/metal. A. Normalizing B. Annealing C. Tempering D. All of these Answer: C 40. Matensite (stainless steel) contains 4 to 26% Cr. And a maximum of ____ % nickel. A. 2.5 B. 3.5 C. 3.25 D. 2.0 Answer: A 41. A ____ is used to be test the accuracy of holes. A. Snap gage B. Ring gage C. Plug gage D. Depth gage Answer: C 42. A ____ consists of a hardened and ground steel bar in which two hardened and ground of the same diameter are set. A. Caliper B. Gage block C. Sine bar D. Micrometer Answer: C 43. A ______ consists of a slide and a swivel vise mounted on the compound rest in  place of the tool post. A. Milling attachment B. Relieving attachment C. Grinding attachment D. Reaming attachment Answer: A 44. ________ are hardened steel devices with a taper shank on one end and a 60 degree point at the other end. A. Tailstock centers B. Lathe centers C. Live centers D. Dead centers Answer: B 45. It is a work holding device. A. Arbor B. Mandrel C. Jigs D. Fixtures Answer: B 46. The cutting of groove nest to a shoulder on a piece of work. A. Undercutting B. Necking C. Grooving D. Any of these Answer: D 47. The operation of producing a beveled edge at a specified angle of the nd of a turned diameter. A. Chamfering B. Knurling C. Honing D. Undercutting Answer: A 48. It is a large casting located on the left end of the bed. A. Tailstock B. Head stock C. Carriage D. Chuck Answer: B 49. A ________ is a thread that has a lead equal to pitch. A. Right hand thread B. Left hand thread C. Single thread D. Multiple head Answer: C 50. The distance between the crest and the base of the thread, measured perpendicular to the axis. A. Depth of thread B. Length of engagement C. Depth of engagement D. Axis of thread Answer: A 51. Matensite (stainless steel) contains 4 to 26% Cr. And a maximum of _____% nickel. A. 2.5 B. 3.5 C. 3.25 D. 2.0 Answer: A 52. Compute the deflection of a 18 coils helical spring having a load of 100 kgs. The modulus of elasticity in shear of spring is 96.62 GPa, OD pof 9 525 mm. The spring is square and ground ends. A. 9 mm B. 112 mm C. 101 mm D. 14 mm Answer: C 53. A flanged bolt coupling has ten (10) steel 25.4 mm diameter bolts evenly tighten  around a 415 mm bolt circle. Determine the torque capacity of the connection if the allowable shearing stress in the bolt is 50 MN/m 2. A. 59.95 KN-m B. 46.15 KN-m C. 52.6 KN-m D. 43.8 KN-m Answer: C 54. The material that can cut/wear hardest substance subjected to: A. Carbide B. Tungsten C. Abrasive D. Vanadium Answer: C 55. A ridge of uniform section in the form of a helix cut around the circumference of a cylinder and advancing along the axis. A. Thread roots B. Screw threads C. Helix thread D. Chamfers Answer: B 56. Cast iron flywheels are commonly designated with factor of safety of: A. 10 to 13 B. 10 to 14 C. 10 to 12 D. 8 to 13 Answer: A 57. Class of material exhibiting decreased electrical conductivity with increasing temperature. A. Aluminum B. Metals C. P-type semi-conductors D. N-type semi-conductors Answer: B 58. The welding made along the edges of twp parallel plates is called: A. Groove joint B. Edge joint C. Fillet joint D. Corner joint Answer: B 59. Not part and in fact should not be used in the steel melting process. A. Coke B. Zinc C. Silicon D. Aluminum Answer: A 60. Rule of thumb in calculating the equipment foundation mass should be _____ times the weight of the machinery it is supposed to support. A. 3 – 5 B. 3 – 9 C. 3 – 6 D. 2 – 4 Answer: A 61. Used to permit lever shift for vertical travel of rail. A. Ball crank B. Clamp plates C. Plunger knob D. None of these Answer: C 62. It is mounted on the top of the column and is guided in perfect alignment by the machined dovetailed surfaces. A. Over arm B. Spindle C. Arbor D. Saddle Answer: A 63. Refers to circular milling attachment that is bolted to the top of the table of a plain  or universal milling machine. A. Slotting attachment B. Rotary attachment C. Milling attachment D. Spiral attachment Answer: B 64. The process of removing burrs and the gates and risers left on casting after the molding process. A. Reaming B. Snagging C. Honing D. Knurling Answer: B 65. The ____ supports the table on the cross rail and moves across it from left to right. A. Apron B. Bearing C. Spindle D. Handle Answer: A 66. Name of mechanism, which a welding operator holds during gas welding and at the end of which the gages are burred to perform the various gas welding operation. A. Hose B. Torch C. Gage D. Switch Answer: B 67. A tool used for measuring diameters. A. Protractor B. Scriber C. Caliper D. Compass Answer: C 68. A fine grained, slaty silica rock used for sharpening edged tools. A. Oilstone B. Surface grinder C. Rocky oil D. None of these Answer: A 69. Device used to prevent leakage of media. A. Gasket B. Seal C. Shield D. Stopper Answer: B 70. Flexible material used to seal pressurized fluids normally under dynamic conditions. A. Packing B. Gasket C. Shield D. Seal Answer: A 71. The strength of non-ferrous alloys is at maximum at room temperature while that of ferrous metal has a maximum strength at _____ 0 F. A. 400 B. 450 C. 1200 D. 350 Answer: A 72. The ratio of stress acting on an elastic substance to the decrease in volume per unit volume. A. Bulk modulus B. Elastic limit C. Modules of resilience D. Modules of elasticity Answer: A 73. The normal helix angles in helical gear is recommended in the range of ____ degrees. A. Less than 18 B. 15 to 25 C. 20 to 35 D. 20 to 30 Answer: B 74. Type of bolt commonly used in the construction that is threaded in both ends. A. Stud bolt B. Hex bolt C. Acne threaded bolts D. Square threaded bolts Answer: A 75. It is rigid place which serves to transmit force from a piece another piece or to cause/control motion. A. Follower B. Cam motion C. Crank D. Link Answer: D 76. A 20 kgs. Cast iron piece rest on a plain horizontal aluminum surface. To move the object it needs a force of 7 lbs. The density of Al is 0.098 lb/in 3 and iron is 0.260 lb/in3. A. 0.172 B. 1.601 C. 0.186 D. 0.160 Answer: D 77. Which of the following is an iron based alloy containing 9 – 16% chromium? A. Mn hadfield steel B. Stainless steel C. Chrome-moly steel D. High chrome steel Answer: B 78. Shafting up to 3 inches in diameter is usually made from cold rolled steel and the common biggest diameter of cold rolled steel is: A. 4 ½ inches B. 6 ¾ inches C. 6 7/8 inches D. 5 inches Answer: D 79. It is ideal for maximum quietness in sprockets drive operation to choose ____ or more teeth. A. 24 B. 27 C. 18 D. 21 Answer: B 80. All associated with standard material specification, except: A. American Iron and Steel Institute B. Society of Automotive Engineers C. Southeast Asia Iron and Steel Institute D. American Society for Testing Materials Answer: C 81. A hand tool used to measure tension of bolts. A. Tensile range B. Torque wrench C. Hooke’s gauge D. Spring balance Answer: B 82. A hand tool used to measure engine crank web deflection. A. Feeler gage B. Compound gage  C. Distortion gage D. Dial gage Answer: C 83. A device used for accurately measuring diameters. A. Dial gage B. Feeler gage C. Caliper D. Micrometer Answer: D 84. It is used to true and align machine tools, fixtures and works. A. Dial indicator B. radial indicator C. Dial gage D. Feeler gage Answer: A 85. The operation of making a cone-shaped enlargement of the end of a hole, as for a recess for a flattened screw. A. Counter boring B. Counter sinking C. Reaming D. Drilling Answer: B 86. A kind of chuck, which has reversible jaws, which could be adjusted separately. A. Independent chuck B. Combination chuck C. Magnetic chuck D. Universal chuck Answer: A 87. It is used for cutting long pieces of metals. A. Planer B. Shaper C. Power saw D. Broaching machine Answer: C 88. It is used for external, internal and relieving of mill cutters and taps A. Milling attachment B. Thread attachment C. Taper attachment D. Relieving attachment Answer: D 89. It is the stretching or spreading of metal by hammering A. Peening B. Flaring C. Upsetting D. Bending Answer: A 90. The ______ is the most common of the standard tapers. A. Brown B. Jarno C. Sharpe D. Morse Answer: D 91. For stable equipment foundation, the total combined engine driven equipment and foundation center of gravity must be kept below the foundation’s too that usually about ____ times the usual total combined weight of the machinery it is supposed to support. A. 3 to 4 B. 2 to 4 C. 3 to 7 D. 3 to 5 Answer: D 92. A cylinder tank with 10” inside diameter contains oxygen gas at 2500 psi. Calculate the required wall thickness in (mm) under stress of 28 000 psi. A. 11.34 mm B. 12.44 mm C. 10.24 mm D. 10.54 mm Answer: A 93. The process of opening the joint portion immediately after the welding greatly improves the fusion structures avoids possible cracking, avoids possible distortion etc. Peening can also _____ process at the same time. A. Tempering B. Normalizing C. Martempering D. Annealing Answer: A 94. What do you call the distance between rivet center nearest each other in adjacent rows? A. Pitch B. Margin C. Back pitch D. Diagonal pitch Answer: D 95. Which of the following is a major alloy in tool steel? A. Cr B. Cobalt C. Fen D. Mn Answer: A 96. Should two equal and opposite collinear forces is added to the forces already in equilibrium, which of the following statements is true? A. Unbalanced moment is maintained B. Equilibrium is maintained C. Equilibrium id disturbed D. It creates an unbalanced situation Answer: B 97. In pressure vessels, which of the following resists internal pressure through bending? A. Shell-type element B. Cam type element C. Plate-type element D. Spherical type element Answer: C 98. Which of the following flanges is suitable for low and moderate pressure? A. Ring-flange B. Lap joint flange C. Tapered-hub flange D. Welding neck type Answer: A 99. It is the process of pre-stressing or over-stressing of a hollow cylindrical member beyond the elastic range. A. Presstagge B. Autofrettage C. Stress relieving D. Countersinking Answer: B 100. It is the phenomenon occurring when two touching surfaces have a high contact pressure and when these surfaces have minute relative moton. A. Prestressing B. Fretting C. Friction D. Carving Answer: B ELEMENTS 9 1. Metal that assists lubrication or lubricant in itself. A. Zinc B. Antimony C. Babbitt D. Lead Answer: C 2. The smallest area at a point of rupture of a tensile specimen divided by the original area is called: A. Percentage elongation B. Izod test C. Charpy test D. Percentage reduction of the area Answer: D 3. All are associated with then grade of steel except: A. SAE 43xx B. SAE 13xx C. SAE 10xx D. SAE 74xx Answer: D 4. Cold working of steel plates make the metal: A. Tougher B. More detail C. Harder D. More malleable Answer: C 5. The property that characterizes the material’s ability to be drawn into a wire is called: A. Ductility B. Thermal conductivity C. Tensile strength D. Endurance limit Answer: A 6. Normal stress relieving temperature for cast steel is: A. 200 to 3500F B. 400 to 5000F 0 C. 300 to 400 F D. 450 to 5500F Answer: D 7. Most effective alloying element for reducing brittleness of steel at very low temperature. A. Manganese B. Molybdenum C. Silicon D. Nickel Answer: D 8. Ordinary steel begins to lose strength and elasticity significantly of about what temperature? A. 900 – 10000F B. 800 – 9000F C. 700 – 850 F0 D. 600 – 7000F Answer: D 9. For a high corrosion resistant stainless steel, what minimum chromium content is required? A. 8% B. 4.3% C. 1.1% D. 5.8% Answer: A 10. A material that should be avoided in constructing wood pattern is: A. Sap wood B. Kiln dried wood C. Heart wood D. Core portion of wood Answer: A 11. Hacksaw blades are made of what materials? A. Tool steel B. Tungsten alloy steel C. High-speed steel D. Any of these Answer: D 12. A hacksaw blade with 24 TPI is best suitable for cutting which of the following materials? A. Tubing B. Brass and copper C. Sheet metal over 18 gage D. Any of these Answer: D 13. Which of the following is a “must” for all hard hacksaw blades? A. It has a hard back and flexible teeth B. It has flexible back and hard teeth C. It has the entire blade hardened D. It will only fit solid frame hacksaw Answer: C 14. In how many positions can a hacksaw blade be placed in a frame? A. Two positions B. One position C. Four positions D. Three positions Answer: C 15. Files are divided into two general classes. How are these classified? A. Rough and smooth B. Single-cut and double cut C. Large and small D. Flat shapes and round shapes Answer: B 16. The term “set” of a saw best defines what? A. To set properly in the frame B. Alternate teeth are turned slightly to left and right to make cutting slot slightly wider than the thickness of the thickness of the blade C. The teeth have been case-hardened for better cutting D. The teeth are set evenly apart Answer: B 17. All hard hacksaw blade is best suited for work on which of the following? A. Brass B. Cast iron C. Tool steel D. Any of these Answer: D 18. Which of the following is the best instrument for measuring thousandths of an inch? A. Caliper B. Micrometer C. Tachometer D. Pyrometer Answer: B 19. A hacksaw blade with 34 teeth per inch should be used for cutting which of the following materials? A. Brass B. Heavy stock C. Cast iron D. Thin wall tubing Answer: D 20. How is the hacksaw blade should be placed in the frame?  A. The teeth pointing forward B. The teeth pointing backward C. One end looser than the other end D. The teeth facing in any direction Answer: A 21. The gradual chemical reaction by other substance such that the metal is converted to an oxide or other compounds. A. Corrosion B. Cheeping C. Rusting D. Weathering Answer: A 22. What is the property of a material which resists forces acting to pull the material apart? A. Shear strength B. Tensile strength C. Torsional strength D. Compressive strength Answer: B 23. What is the difference between brass and bronze? A. Brass is composed of copper and zinc while bronze is composed of copper and tin B. Brass is composed of copper and zinc while bronze is basically copper and tin plus non-ferrous alloy such as manganese, aluminum and chromium C. Bronze is reddish in color while brass is a mixture of copper and antimony D. Bronze is mostly an alloy of copper and tin while brass is a mixture of copper and antimony Answer: A 24. A liquid metal is called ______. A. Mercury B. Lead C. Zinc D. Aluminum Answer: A 25. Which of the following elements when large quantity is harmful to the ferrous metal? A. Sulfur B. Silicon C. Zinc D. Aluminum Answer: A 26. It has molybdenum alloy except ______. A. SAE 43xx B. SAE 41xx C. SAE 6xxx D. SAE 5xxx Answer: D 27. Cast alloy steel for very high temperature application. A. Manganese – nickel steel casting B. High chrome steel casting C. Chrome – nickel steel casting D. High manganese casting Answer: C 28. What heat treatment process can cast steel materials of high chrome high manganese etc. be subjected for the purpose of machining process? A. Annealing B. Tempering C. Normalizing D. Quenching Answer: A 29. Galvanized steel plate is: A. Aluminum B. Tin C. Zinc D. Manganese Answer: C 30. Major component of bronze casting is: A. Copper B. Manganese C. Zinc D. Lead Answer: A 31. Which of the following is the usual procedure when cutting a long thin piece of metal? A. Turn the blade upside down in the frame B. Turn the blade at right angles to the frame C. Use a blade with fewer teeth per inch D. Set the blade in the frame with the teeth facing toward you Answer: B 32. A hacksaw blade with 18 teeth per inch is best suited for cutting what material(s)? A. Solid stock B. Aluminum C. Cast iron D. Any of these Answer: D 33. What is used of coolant in the power hacksaw when cutting materials? A. Absorb the heat of friction B. Prevent the blade from overheating C. Prevent the blade from losing its temper D. All of these Answer: D 34. What is used for finishing a piece of work to size with a file? A. Double-cut fine-tooth file B. Mill file C. Single-cut fine-tooth file D. Crossing file Answer: C 35. The product of finishing off a piece of metal with a real smooth finish. A. Draw-filling B. Mill-filling C. Side-filling D. Flat-filling Answer: A 36. How do you call a small piece of metal clogged between the teeth on a file? A. Clogs B. Pins C. Flats D. Bumps Answer: B 37. Which of the following is described as the “safe edge” of the file? A. The end opposite the handle B. The edge with no teeth C. The one with the handle D. None of these Answer: B 38. The best procedure when filling a piece of metal in a lathe is to take. A. Short even strokes B. Long fast strokes C. Long slow strokes D. Short fast strokes Answer: C 39. Which of the following information is necessary when ordering a file?  A. Size (length) B. Type C. Shape D. All of these Answer: D 40. Which of the following is the best file to be used when finishing sharp corners or slots and grooves? A. Mill file B. Knife file C. Square D. Jeweler’s file Answer: B 41. Alloy steel known for its resistance to corrosion, abrasion and wear that is usually ideal for mill grinding of ore in cement and concentrator application. It is usually combined with molybdenum to increase the depth hardening. A. Manganese chromium steel B. Chromium – moly steel C. Chromium – nickel – moly steel D. Manganese – moly steel Answer: B 42. Commonly utilized / cheapest shaft material available in the market with carbon content of 0.28 to 0. 4? A. SAE 4132 B. SAE 4320 C. SAE 1030 D. SAE 4130 Answer: C 43. Heating of metal above the critical temperature and then cooling slowly usually in the furnace to reduce the hardness and improve the machinability is called: A. Normalizing B. Annealing C. Tempering D. Quenching Answer: B 44. It is hardening treatment whereby a cast metal is being heated to a very high temperature then suddenly subjected to rapid cooling to improve hardenability or wear resistance is called: A. Normalizing B. Tempering C. Annealing D. Quenching Answer: D 45. SAE steel that responds to heat treatment. A. SAE 1060 B. SAE 1117 C. SAE 1030 D. SAE 1020 Answer: B 46. A form of correction that develop on a highly localized area on a metal surfaces. A. Crevice B. Erosion C. Galvanic D. Spitting Answer: D 47. The deterioration of organic coating characterized as completely _______. A. Chalking B. Rusting C. Checking D. Fritting Answer: A 48. The temperature above which the alloy is liquid and will run is known as _______. A. Melting point B. Flow point C. Pour point D. Dew point Answer: A 49. It refers to any layer or deposit of extraneous material on the heat – transfer surface. A. Low line B. Pressure drop C. Fouling D. Scaling Answer: C 50. Steel containing large amounts of mild nickel and chromium. A. Carbon steel B. Stainless steel C. Alloy steel D. Cast steel Answer: B 51. How is “eleven – sixteenths” of an inch expressed in decimal? A. 0.6785 B. 0.6875 C. 0.7685 D. 0.6578 Answer: B 52. What is the approximate distance of the making on a micrometer barrel? A. 0.025” apart B. 0.0025” apart C. 0.250” apart D. 2.50” apart Answer: A 53. Which of the following is the effect if the lathe is put into black gear? A. Go backwards of the same speed B. Faster C. Slower D. At a slower speed backwards Answer: C 54. The work should be held with ______ when using a drill press. A. The hand B. A vise or clamp C. A pair of pliers D. Gloves on Answer: B 55. What is normally used in drilling a hole in a piece of work held in a lathe chuck? A. Compound rest B. Tailstock and drill chuck C. Cross-feed D. Headstock Answer: B 56. Copper is annealed by heating to a cherry red color and: A. Dousing in cold water B. Dousing in oil C. Cooling slowly in air D. Dousing in hot water Answer: C 57. What is the main purpose of “annealing” a metal? A. To make the metal harder B. To make metal softer C. To make the metal harder medium-hard D. To make the metal harder shiny Answer: B 58. The purpose of “tempering” is to make a metal what? A. Harder B. Less brittle C. Softer D. More brittle Answer: B 59. What is the minimum diameter of a piece of round stock necessary to make key ¾” on a side? A. 1.5” B. 0.1”  C. 1.06” D. 0.75” Answer: C 60. A scriber is made from what material? A. Carbon steel B. Tool steel C. Cold-rolled steel D. Hot-rolled steel Answer: B 61. The corrosion of iron or iron – base alloy. A. Rusting B. Crazing C. Chalking D. Fritting Answer: A 62. A corrosion occurs within or adjacent to a crevice formed by contact with another piece of the same or another metal is called: A. Galvanic B. Pitting C. Erosion D. Crevice Answer: A 63. An alloy of tin, copper, antimony or sometimes lead. A. Gold B. Babbitt C. Aluminum D. Cast iron Answer: B 64. The cheapest and most abundant engineering material is __________. A. Aluminum B. Steel C. Cast iron D. Babbitt Answer: C 65. They are usually steel or steel casting. A. Mild steel B. Carbon steel C. Fire box steel D. Drop – forge – dies Answer: B 66. An iron has physical properties closely resembling those of mild steel called. A. Malleable cast iron B. Malleable iron C. White iron D. Gray iron Answer: A 67. An iron in which most of the carbon is chemically combined with the iron is called. A. Cast iron B. Gray iron C. White iron D. Malleable iron Answer: C 68. Which of the following metals is non-magnetic? A. Manganese steel B. Cast steel C. Alloy steel D. Cast iron Answer: A 69. Which of the following is not a kind of cast iron? A. Gray iron B. White iron C. Malleable iron D. Lead iron Answer: D 70. Which of the following is not used to temper steel? A. Oil bath B. Brine / slat bath C. Steam bath D. Water bath Answer: C 71. Before applying layout blue on a piece of metal, it must be: A. Roughened B. Cleaned C. Heated D. Cold Answer: B 72 A drill bit has how many flutes? A. 4 flutes B. 2 flutes C. 3 flutes D. No flutes Answer: B 73. The alignment of coupling faces can be checked by which process? A. Using an inside micrometer B. Inserting a thermocouple C. Inserting a feeler gage between the coupling faces at various points around the circumference D. Rotating and measuring to nearest permanent fitting Answer: C 74. A piece of cast iron held against an emery wheel will give off what? A. Dull yellow sparks B. Red sparks C. Bright shiny sparks D. No sparks Answer: A 75. When cutting material in lathe, the softer the material being cut, the tool bit should have: A. More top rake B. Double top rake C. Less top rake D. Any of these Answer: C 76. After grinding a tool bit, the cutting edge should be: A. Case-hardened B. Stoned with an oilstone C. Rubbed with emery cloth D. Rubbed with crocus cloth Answer: B 77. When turning a piece of round metal in a lathe, the front clearance should be smaller for: A. Large-diameter B. Cutting angles C. Small-diameter cutting D. None of these Answer: C 78. When cutting material in a lathe, the harder the material being cut, the tool bit should have: A. More side rake B. More top rake C. Less side rake D. No side rake Answer: C 79. What is the primary purpose of knurling? A. Smooth material B. Roughen material C. Polish material D. Sharpen material Answer: B 80. What do you call the process of removing the sharp edges from a piece of stock? A. Knurling B. Planning C. Chamfering D. Turning Answer: C 81. Which of the following metals is easy to chisel? A. Alloy steel B. Manganese steel C. Stainless steel D. Cast iron Answer: B 82. Ferrous metals contain a relatively large amount of ______. A. Manganese B. Carbon C. Sulfur D. Phosphorus Answer: B 83. Which of the following is not a classification of iron core? A. Siderite B. Hematite C. Sulfurite D. Magnetite Answer: C 84. Stainless steel is obtaining principally by the use of which of the alloying elements? A. Chromium B. Nickel C. Carbon D. Tungsten Answer: A 85. Which of the following metals will respond to heat treatment? A. Cast iron B. Wrought iron C. Medium carbon steel D. Low carbon steel Answer: C 86. The property of steel which resist indention of penetration is called. A. Hardness B. Elasticity C. Ductility D. None of these Answer: A 87. The ability of metal to stretch band or twist without breaking or cracking is called. A. Elasticity B. Ductility C. Brittleness D. Plasticity Answer: B 88. The ability of the material to return to its original shape after being elongated or distorted when the forces are released is called. A. Elasticity B. Brittleness C. Plasticity D. Creep Answer: A 89. Material, usually ceramics employed where resistance to very high temperature is required, as for furnace linings and metal melting pots is called: A. Bricks B. Insulator C. Refractories D. Clay Answer: C 90. Any material that retard the flow of electricity, used to prevent or escape of electric current from conductors. A. Bricks B. Insulators C. Refractories D. Composite Answer: B 91. At what speed that carbon steel drills should be operated? A. Speeds greater than that when using a high-speed drill  B. Speeds less than that when using a high-speed drill C. The same speed as that when using a high-speed drill D. None of the above Answer: B 92. A specific method of zinc galvanizing in which parts are tumbled in zinc dust at high temperatures. A. Sheradizing B. Super finishing C. Polishing D. Pickling Answer: A 93. Abrasion of parts against wheels or belts coated with polishing compounds. A. Sheradizing B. Super finishing C. Polishing D. Pickling Answer: C 94. A super fine grinding operation used to expose non-fragmented, crystalline base metal. A. Sheradizing B. Super finishing C. Polishing D. Pickling Answer: B 95. A process in which metal is dipped in ductile acid solutions to remove dirt grease and oxides. A. Sheradizing B. Super finishing C. Polishing D. Pickling Answer: D 96. A hot-dip or electroplate application of tin to steel. A. Tin-plating B. Metal spraying C. Organic finishes D. Lapping Answer: A 97. A fine grinding operation used to obtain exact fit and dimensional accuracy. A. Tin-plating B. Metal spraying C. Organic finishes D. Lapping Answer: D 98. The covering of surfaces with an organic film of paint, enamel or lacquer. A. Tin-plating B. Metal spraying C. Organic finishes D. Lapping Answer: C 99. The spraying of molten metal onto a product. Methods include metallizing, metal powder spraying and plasma flame spraying. A. Tin-plating B. Metal spraying C. Organic finishes D. Lapping Answer: B 100. Application of a thin phosphate coating on steel improve corrosion resistance. A. Parkerizing B. Honing C. Hard surfacing D. Galvanizing Answer: A ELEMENTS 10 1. What is the lightest known metal? A. Mercury B. Steel C. Chromium D. Aluminum Answer: D 2. Material having a high electrical resistance and should not be used as conductor of electrical current. A. Magnesium B. Copper C. Nickel D. Iron Answer: D 3. The property that characterizes a material ability to be drawn into a wire is known as: A. Plasticity B. Elasticity C. Ductility D. Utility Answer: C 4. Stress relieving is also ______ for the purpose of reducing the internal stress of steel material / metal. A. Quenching B. Normalizing C. Tempering D. Drawing Answer: A 5. A carbon content in the range of _____ in steel readily responds to heat treatment. A. 0.35 to 0.40% C B. 0.28 to 0.30% C C. 0.18 to 0.25% C D. 0.12 to 0.15% C Answer: A 6. It indicates how many times a volume of material is heavier than an equal volume of water. A. Specific gravity B. Specific volume C. Specific weight D. Specific density Answer: A 7. Nickel – Chromium – Molybdenum steel designation SAE ________. A. 81 xx B. 74 xx C. 94 xx D. 64 xx Answer: C 8. Moment of inertia is also called: A. Modulus of elasticity B. Weep strength C. Radius of gyration D. None of these Answer: D 9. It is hardening treatment whereby a cast metal is being heated to a very high temperature then suddenly subjected to rapid cooling to improve hardenability of wear resistance is called: A. Annealing B. Normalizing C. Tempering D. Quenching Answer: D 10. A good eneral purpose deoxidizer which promotes fine grain in steel. A. Copper B. Magnesium  C. Molybdenum D. Silicon Answer: D 11. This process is known as bonderizing when used as a printer for paints. A. Parkerizing B. Honing C. Hard surfacing D. Galvanizing Answer: A 12. A grinding operation using stones moving in a reciprocating pattern. Leaves a characteristic cross-hatch pattern. A. Parkerizing B. Honing C. Hard surfacing D. Galvanizing Answer: B 13. The creation (by spraying, platting, fusion welding or heat treatment) of a hard metal surface in a softer product. A. Parkerizing B. Honing C. Hard surfacing D. Galvanizing Answer: C 14. A zinc coating applied to low carbon steel to improve corrosion resistance. The coating can be applied in a hot dip bath, by electroplating or by dry tumbling (sheradizing). A. Parkerizing B. Honing C. Hard surfacing D. Galvanizing Answer: D 15. The lector-deposition of a coating onto the workpiece. Electrical current is used to drive ions in solution to the part. The workpiece is the cathode I the electrical circuit. A. Electroplating B. Calorizing C. Burnishing D. Buffing Answer: A 16. The diffusing of aluminum into a steel surface, producing an aluminum oxide that protects the steel from high-temperature corrosion. A. Electroplating B. Calorizing C. Burnishing D. Buffing Answer: B 17. How do you call the process of fine grinding or peening operation designed to leave a characteristic pattern on the surface of the workpiece. A. Electroplating B. Calorizing C. Peening D. Buffing Answer: C 18. A fine finishing operation, similar to polishing using a very fine polishing compound. A. Elactroplating B. Calorizing C. Burnishing D. Buffing Answer: D 19. Rotating parts in a barrel filled with an abrasive or non-abrasive medium. Widely used to remove burns, flash, scale and oxides. A. Abrasive cleaning B. Calorizing  C. Barrel finishing D. Anodizing Answer: C 20. An electroplating-acid bath oxidation process for aluminum and magnesium. The workpiece is the anode in the electrical circuit. A. Abrasive cleaning B. Tumbling C. Barrel finishing D. Anodizing Answer: D 21. Treatment process that produces a residual compressive stress at the surface and residual tension on the inside that results in considerable increase in fatigue strength for members on torsion / bending is known as: A. Partial quenching B. Heavy oil quenching C. Quenching D. Shallow quenching Answer: D 22. The flux that should be provided in soldering electrical connection or commutator wires as it tends to corrode the connections. A. Sal ammoniac B. Zinc chloride C. Stearing D. Acid fluxes Answer: D 23. The characteristics of tool steel sustain shocks and major impacts is due to its: A. Toughness B. Stiffness C. Ductility D. Machinability Answer: A 24. The application of electrical current to the corrosion circuit to counter the corrosion reaction is called: A. Cathodic protection B. Sacrificial anodes method C. Chemical corrosion process D. Galvanic action Answer: A 25. A major component of cast steel is: A. Silicon B. Iron C. Manganese D. Chromium Answer: B 26. Normally, cast iron contains 2% carbon or more and silicon in the range of ____ %. A. 1 to3 B. 1 to 4 C. 2 to 3 D. 1 to 6 Answer: A 27. The material for engine radiation is usually made of ______. A. Yellow brass B. Silicon brass C. Admiralty brass D. Navy brass Answer: A 28. A problem-by product used as an electrode in an electric arc furnace melting operations is called: A. Anthracite coke B. Foundry coke C. Graphite electrodes D. Bituminous coke Answer: C 29. Which of the following does not effect the tensile strength of steel? A. Sulfur B. Cobalt  C. Phosphorus D. Boron Answer: D 30. 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 limit of the steel is: A. Equal to the allowable stress of the module of elasticity B. Equal to half of the ultimate strength C. Equal to module of elasticity D. Equal to 80% of the elastic limit Answer: B 31. Shooting sand (i.e. sand b