Mechanical Engineering Quiz PDF

1. A correct cutting angle on a drill for ordinary work is: a. 45⁰ b. 59⁰* c. 64⁰ d. 70⁰ 2. When using a drill press, the work should be hold with: a. glove hand b. the hand c. a vise and a clamp* d. pliers 3. A machining operation whereby the tool recipr...

1. A correct cutting angle on a drill for ordinary work is: a. 45⁰ b. 59⁰* c. 64⁰ d. 70⁰ 2. When using a drill press, the work should be hold with: a. glove hand b. the hand c. a vise and a clamp* d. pliers 3. A machining operation whereby the tool reciprocates and the feed is stationary. a. reaming b. shaping* c. planning d. turning 4. A machining operation whereby the tool rotates and the feed is stationary. a. shaping b. milling* c. turning d. reaming 5. A machine used in shaping metal by means of abrasive wheel or removal of metals with abrasive. a. shaper b. planer c. grinder* d. power saw 6. To prevent leakage in dynamic seals, it is recommended to used a. gaskets b. seals c. packings* d. felts 7. The process of checking or producing checkers on the surface of the piece by rolling checkered depressions in the surface. a. indexing b. soldering c. knurling* d. quenching 8. Tooth width measured along the chord at the pitch circle. a. chord space b. chordal thickness* c. chord clearance d. chord length 9. It is recommended for high speed application that the maximum number of teeth in small sprocket should be: a. 10 to 20 b. 16 to 32 c. 14 to 28 d. 18 to 24* 10. Cast iron flywheels are commonly designated with a factor of safety of: a 8 to 10 b. 10 to 13* c. 5 to 6 d. 18 to 20 12. An agency handling assistance to all foundry, machine shop and metallurgical plant operation. a. DOST b. BOI c. MIRDC* d. UNICEF 12. A metal characteristic that absorbs extreme deformation without rupture is called: a. hardness b. ductility c. plasticity* d. toughness 13. The size of all the pipes from 1/16 inches to 12 inches is defined by _____ size. a. design b. external diameter c. inside diameter* d. tubular 14. Cutting lubricants used in drilling, reaming and lapping of cast iron parts. a. soda water b. kerosene c. soluble oil d. dry* 15. The angle developed between tooth profile and radial line at its pitch point is referred as: a. approach angle b. pressure angle* c. recess angle d. base helix angle 6. The purpose of annealing is to make a metal: a. harder b. medium hard c. softer* d. shiny 17. AISI numbering for silicon steel. a. 85XX b. 92XX* c. 93XX d. 87XX 18. Specific weight of steel in lbs/inches3 a. 0.832 b. 0.328 c. 0.283* d. 0.823 19. Ratio of coil to wire diameter, a measure of coil curvature. a. spring rate b. spring index* c. Wahl’s factor d. spring scale 20. When hole is smaller than the shaft, it will take pressure to pull the parts together, and the allowance is negative and is termed as: a. negative fits b. negative allowance c. interference of metals* d. negative allowance 21. A kind of thread that is generally used. a. UNF b. UNEF c. UNC* d. 8-Thread series 22. A machine tool used principally to machine flat or plane surfaces with a single point cutting tool. a. shaper* b. planer c. milling d. lathe 23. The ratio of relative viscosities colliding bodies after impact to their velocity before impact. a. coefficient of friction b. coefficient of velocity c. coefficient of restitution* d. coefficient of fluctuation 24. In machine shop forging operation of lengthening a piece of stock while reducing the cross sectional area of work is called: a. reducing b. upsetting* c. upgrading d. desizing 25. It is the radial distance between the top of the tooth and the bottoms of the mating tooth space. a. clearance* b. tolerance c. lead d. crest 26. An arc of the pitch circle through which a tooth travels from its contact to a mating tooth at the pitch point to the point where contact ceases. a. arc of action b. arc of recess* c. arc of approach d. backlash 27. The distance a helical gear would thread along its axis one revolution of it were free to move axially. a. crest b. lead* c. module d. clearance 28. Ability of a material to absorb energy when deformed elastically and return to it when unloaded is: a. toughness b. creep c. resilience* d. plasticity 29. A weld made to hold the parts of a weldment in proper alignment until final welds are made. a. fusion weld b. tack weld* c. electric weld d. oxy-acetylene weld 30. It is a machine used for testing of very thin steel or surface layers. a. Charpy test b. Izod test c. Description test d. Rockwell test* 31. A machine tool in which an abrasive wheel is used as a cutting tool to obtain a very smooth finish. a. Broaching machine b. Planer c. Tool grinder* d. Lathe machine 32. A machine tool used to produce a variety of surfaces by using a circular type cutter with multiple teeth a. lathe machine b. milling machine* c. broaching machine d. grinding machine 33. A cutting tool used to finish internal and external surfaces by the use of a cutter called a broach, which has a series of cutting edges of teeth. a. lathe machine b. broaching machine* c. planer d. shaper 34. A kind of chuck, which should not be used where accuracy is required called a. collet chuck b. magnetic chuck c. four jaw chuck d. universal chuck* 35. A tool when pressed into a finished hole in a piece of work, provides center on which the place may be turned otherwise machined called a. mesh b. butt c. mandrel* d. wobble 36. A machine tool which is very similar to a shaper except that the ram reciprocates vertically rather than horizontally. a. lathe b. grinder c. planer d. slotter* 37. A cylindrical bar of steel with threads formed around it and grooves or flutes running lengthwise in it, intersecting with threads to form cutting edges. It is used to cut internal threads. a. Groove b. Lap c. Tap* d. Flute 38. The operation of making a cone-shaped enlargement of the end of a hole, as for a recess for a flat head screw. a. Counter sinking* b. Knurling c. Squaring d. Performing 39. It is an operation of sizing and finishing a hole by means of a cutting tool having several cutting edges. a. Notching b. Piercing c. Turning d. Reaming* 40. The hop term used to include the marking or inscribing of center points circle area of straight lines upon metal surface either curve or flat, for the guidance of the worker called: a. Shaping b. Hobbing c. Laying out* d. Shaping 41. It is used to true and align machine tools fixtures and works to test and inspect size trueness of finished work and compare measurements either heights or depths or many other measurements. a. dial gage b. dial indicator* c. tachometer d. speedometer 42. The process of forming metals by the use of dies after the metal is heated to its plastic range. a. Rolling* b. Forging c. Turning d. Casting 43. A machine tool used to cut metals a lift, medium and large section using a reciprocating hacksaw blade. a. Tool grinder b. Shaper c. Planer d. Power saw* 44. The usual value of helix angle of a drill is: a. 30⁰* b. 60⁰ c. 110⁰ d. 120⁰ 45. Wiping is the process of: a. applying flux during welding process b. cleaning the welded surface after the welding operation is over c. connecting load pipes by soldering alloy* d. low temperature welding 46. In Carthias process a. molten metal is fed into the cavity in metallic mould by gravity b. metal is poured into die cavity and after a predetermined time the mould is inverted to permit a part of main steel in molten state to flow out of cavity c. cavity is filled with a precalculated quantity of metal and a core or plunger is inserted to force the metal into cavity* d. metal is forced into mould under high pressure 47. What is the purpose of riser? a. Feed the casting at a rate consistent with the rate of solidification b. Act as a reservoir for molten metal c. Help feed the casting until oil solidification takes place* d. Feed molten metal from pouring basin to gas 48. The mould for casting ferrous materials a. Copper* b. High carbon steel c. Low carbon steel d. Medium carbon steel 49. A plug gage is used to measure a. cylindrical bores* b. screw thread c. spherical holes d. taper bores 50. When large number of components are turned and parted off a bar the chuck generally used is the _____. a. collet chuck b. four jaw chuck c. magnetic chuck* d. two jaw chuck 51. Which of the following is the cutting speed m of brass? a. 30m/min b. 40m/min* c. 50m/min d. 60m/min 52. Quick return mechanism is used in a a. drilling machine b. grinder c. lathe d. shaper* 53. Mandrel used to hold a. cutting tool b. drill bits c. face plate d. hollow work pieces* 54. In up cut milling, the work piece is fed a. against the milling cutter* b. at an angle of 60⁰ at the center c. at the right angle of the cutter d. the direction of the cutter 55. Sprue is passage provide for the a. out flow b. in flow* c. smooth flow d. solidification of molten material 56. Feed in the lathe machine is expressed in a. mm b. mm per degree c. mm per revolution* d. rpm 57. Rapping allowance is provided on a pattern take care of a. shrinkage b. machining c. distortion d. easy withdrawal* 58. Chuck use in turret lathe is a. collet chuck b. four jaw self centering chuck c. magnetic chuck d. three jaw chuck* 59. Cape in foundry practice refers to a. bottom half of molding box b. coating on the mold face c. middle portion of the mold d. top half molding box* 60. A vent wire is use in a. foundry b. hot forging* c. cold forging d. fitting 61. Angle plate is used for a. cutting tapers in a lathe b. cutting gears in a shaper* c. cutting gears in a milling d. fixing job out angle in a grinder 62. Permeability, in relation to molding sands, is high for a. coarse grain* b. fine grains c. medium grains d. round grains 63. The purpose of tumbler gears in lathe is to a. cut gears b. cut thread c. give desired direction of the movement to the lathe carriage* d. reduce spindle speed 64. A sine bar cannot be used without a/an a. angle gage* b. micrometer c. slip gage d. vernier caliper 65. The operation of finishing drilled hole to the correct size is known as a. counter boring b. counter sinking c. reaming* d. spot facing 66. When the outer corners of the cutting edges of a drill wear away to rapidly, it is an indication of? a. not enough speed b. too much rake angle c. too much high speed d. B or C* 67. Carbon steel should be operated at a. speed greater than that when using a high speed drill b. speed less than that when using a high speed drill* c. the same speed as that using a high speed steel d. none of the above 8. Knurling is done to_____. a. boring b. chamfering* c. planning d. turning 69. When material in a lathe, the harder the material being cut, the tool bit should have a. less side rake* b. more side rake c. more top rake d. no side rake 70. After grinding the tool bit; the cutting edge should be a. case hardened b. rubbed with emery cloth c. rubbed with crocus cloth d. stoned with oil stone* 71. When cutting material in a lathe, the softer the material being cut, the tool bit should have a. any of these b. double top rake c. less top rake* d. more top rake 72. A piece of cast iron hold against an emery wheel will give off a. bright shiny sparks b. dull yellow sparks* c. red sparks d. no sparks 73. The alignment of coupling faces can checked by a. inserting a feeler gage between coupling faces at various points around the circumference* b. inserting thermometer c. rotating and measuring to nearest permanent fitting d. using an inside micrometer 74. A drill bit has a. 1 flute b. 2 flutes* c. 3 flutes d. 4 flutes 75. When using a drill press, the work should be held with a. a pair of pulley b. a vise or clamp* c. gloves on d. the hand 76. When a lathe is put into back gear, it will go a. at a slower speed backwards b. at the same speed backward c. faster d. slower* 77. On a lathe, the dead center is used after a. boring b. center-drilling* c. drilling c. reaming 78. The best file to use when finishing sharp corner or a lots of grooves is the a. jewelry file b. knife file* c. mill file d. square file 79. Never use a file a. that is dirty b. with a tang* c. without a handle d. without oiling 80. Which of the following information is necessary when ordering a file a. size b. shape c. type of teeth d. all the above* 81. When filling a piece of metal in a lathe if short quick strokes are used the finished piece will probably a. be out of round b. be perfect c. have small flat areas on the surfaces d. A and C * 82. The best procedure when filling a piece of metal in a lathe is to take ______ a. long fast stroke b. long slow stroke* c. short even stroke d. short fast stroke 83. Small piece of metal clogged between the teeth on a file are called a. bumps b. clogs c. flats d. pins* 84. Finishing off a piece of metal with a real smooth finish can be done by a. draw-filling* b. flat-filing c. milling-filing d. slide-filing 85. For finishing a piece of work to size the file to use is the a. crossing file b. double-cut fine-tooth file c. mill file d. single-cut fine-tooth file* 86. For filling lead or babbit, use a a. lead float file b. mile file c. vixen file d. A and C* 87. A hacksaw blade with 32 TPI is best suited for cutting a. small tubing b. conduit c. sheet metal under 18 gage d. any of the above* 88. A coolant is used when cutting a material in a power hacksaw to a. absorb heat of friction b. prevent the blade from overheating c. prevent the blade from loose temper d. all of the above* 89. A hacksaw blade with 10 teeth per inch is best suited for cutting a. aluminum b. cast iron c. solid iron d. any of the above* 90. When cutting a long thin piece of metal a. set the blade in the frame with the teeth facing toward you b. turn the blade at right angles to the frame * c. turn the blade upside down in the frame d. use a blade with fewer teeth per inch 91. The hacksaw blade should be placed in the frame with a. one end looser than the other end b. the teeth facing in any direction c. the teeth pointing backward d. the teeth facing forward* 92. A hacksaw blade with 34 teeth per inch should be used for cutting a. brass b. cast iron c. heavy d. thin wall tubing* 93. All hard hacksaw blade is best suited for work on a. brass b. cast iron c. tool steel d. any of the above* 94. A hacksaw blade with 14 TPI is best suited for cutting a. cold rolled steel b. hot rolled steel c. structural steel d. any of the above* 95. Files are divided into two general classes, namely a. flat shapes and round shapes b. large and small c. rough and smooth d. single-cut and double-cut* 96. A hacksaw blade can be placed in a frame in a. one position b. two positions c. three positions d. four positions* 97. A hard hacksaw blade is one that a. has a hard back and flexible teeth b. has a flexible back and hared teeth c. has the entire blade hardened* d. will only fit a solid frame hacksaw 98. Hacksaw blade with 24 TPI is best suited for cutting a. brass and copper b. sheet metal over 18 gages c. tubing d. any of the above* 99. Hacksaw blades are made of a. high speed b. tool steel c. tungsten alloy steel d. any of the above*