Metal Machining Past Paper Questions PDF

1. Heating above the transformation range, usually 1300F to 1350F, and cooling slowly to soften the metal and increase in machining. A.Annealing B.Hardening C.Normalizing D.Tempering 2. Heating above the transformation temperature and quenching usually in oil for the purpose of incr...

1. Heating above the transformation range, usually 1300F to 1350F, and cooling slowly to soften the metal and increase in machining. A.Annealing B.Hardening C.Normalizing D.Tempering 2. Heating above the transformation temperature and quenching usually in oil for the purpose of increasing hardness A.Annealing B.Hardening C.Normalizing D.Tempering 4. Heating to a subcritical temperature, about 1100F to 1300F and holding at that temperature for a suitable time for the purpose of reducing internal A.Annealing residual stresses. B.Hardening C.Tempering D.Stress relieving 3. Reheating to a temperature below the transformation range, followed by any desired rate of cooling to attain the desired properties of the mass. A.Annealing B.Hardening C.Tempering D.Stress relieving 5. Heating to some 100F above the transformation range with subsequent cooling to below that range in still air at room temperature to produce uniform A.Annealing structure of the metal. B.Hardening C.Normalizing D.Tempering 6. A machine tool used for producing holes in metal by the use of a cutting too called drill. A. Drilling machine B. Boring machine C. Milling machine D. Broaching machine 7. A machine tool used to form metal parts by removing metal from a workpiece by the use of a revolving cutter with many teeth each tooth having a cutting edge which removes its A. share of the Drilling stock. machine B. Boring machine C. Milling machine D. Broaching machine 8. A machine tool used to sharpen or shape tools by using an abrasive wheel. A.Tool grinder B.Shaper C.Planer D.Power saw 9.A machine tool used to enlarge a hole by means of an adjustable cutting tool with only one cutting edge. A. Drilling machine B. Boring machine C. Milling machine D. Broaching machine 10. A machine tool used to cut metal parts of light, medium, and large sections using reciprocating hacksaw blade. A. Tool grinder B. Shaper C. Planer D. Power saw 11. A machine tool used to machine flat or plane surfaces with a single point cutting tool. A. Tool grinder B. Shaper C. Planer D. Power saw 12. A machine tool used for production of flat surfaces on pieces too large or too heavy to hold in a shaper. A.Tool grinder B.Shaper C.Planer D.Power saw 13. A machine tool used to finish internal or external surfaces, such as holes or keyways by the use of cutter called a broach, which has a series of cutting A.Drilling machine edges or teeth. B.Boring machine C.Milling machine D.Broaching machine 14. An alloy of copper and tin. A.Brass B.Bronze C.Iron D.Tin 15. An alloy of copper and zinc A.Brass B.Bronze C.Iron D.Tin 16. The process of forming metal parts by the use of dies after the metal is heated to its plastic range. A.Rolling B.Forging C.Turning D.Casting 17. The process of forming a metal parts by the use of a powerful pressure from a hammer or press to obtain the desired shape, after the metal has A.Rolling been heated to its plastic range B.Forging C.Turning D.Casting 18. A manganese steel containing approximately 0.20% carbon. A.SAE 1320 B.SAE 1230 C.SAE 2340 D.SAE 4230 19. A machine tool in which metal is removed by means of a revolving cutter with many teeth, each tooth having a cutting edge which remove A.Milling its share machine of the stock B.Broaching machine C.Lathe machine D.Boring machine 20. A metal turning machine tool in which the work, while revolving on a horizontal axis, is acted upon by cutting tool which is made to move slowly (feed) in direction more or less parallel to the axis of the work (longitudinal A.Milling feed) machine B.Broaching machine C.Lathe machine D.Boring machine 21. A machine tool used in the production of flat surfaces on pieces too large or too heavy or, perhaps too awkward to hold in a shaper. A.Shaper B.Planer C.Tool grinder D.Power saw 22. It consists of shaping a piece by bringing it into contact with a rotating abrasive wheel. A.Drilling B.Boring C.Grinding D.Broaching 23. A tool used in measuring diameters. A.Caliper B.Nanometer C.Tachometer D.Pyrometer 24. Used to true and align machine tools, fixtures, and works, to test and inspect size trueness of finished work, and to compare measurement either heights or depths or many other measurement A.Dial gauge B.Dial indicator C.Tachometer D.Speedometer 25. The ability to be deformed considerably without rupture. A.Ductility B.Plasticity C.Malleability D.Elasticity 26. The shop term used to include the marking inscribing of center points, circles, arcs, or straight lines upon metal surface, either curved or flat, for the guidance of the worker. A.Shaping B.Hobbing C.Laying-out D.Shaping 27. An operation of sizing and finishing a hole by means of a cutting too having several cutting edges. A.Notching B.Piercing C.Turning D.Reaming 28. The operation of making a cone- shaped enlargement of the end of a hole, as for a recess for a flat screw. A.Countersinking B.Knurling C.Squaring D.Perforating 29. The operation of enlarging a hole by means of an adjustable cutting tool with only one cutting edge. A.Drilling B.Broaching C.Milling D.Boring 30. An imaginary circle passing through the points at which the teeth of the meshing gears contact each other. A.Pitch circle B.Addendum circle C.Dedendum circle D.Base circle 31. A type of bolt intended for use in bolting wooden parts together or wood to metal. It has a short portion of shank just underneath a round head, which is designed to keep the bolt from turning in the wood when the nut is tightened A.U-bolt B.Carriage bolt C.Eye bolt D.Stud bolt 32. The number of teeth per inch of pitch diameter and which gives some indications of the size of the gear teeth. A.Module B.Pitch circle C.Diametral pitch D.Circular pitch 33. The distance from the center of one tooth of a gear to the center of the next consecutive tooth measured on the pitch. A.Circular pitch B.Module C.Diametral pitch D.Pitch circle 34. The portion of a gear tooth that projects above or outside the pitch circle. A.Top relief B.Dedendum C.Addendum D.Tooth space 35. The portion of the gear tooth space that is cut below the pitch circle and is equal to the addendum plus clearance. A.Top root B.Dedendum C.Addendum D.Top land 36. When meshed with a gear, it is used to change rotary motion to reciprocating motion. A.Gear shaft B.Gear tooth C.Gear rack D.Gear motor 37. A kind of gears used for heavy duty works where a large ratio of speed is required and are extensively used in reducers. A.Bevel gears B.Worm gears C.Helical gears D.Spiral gears 38. A kind of gears used to transmit motion from one shaft to another shaft at an angle to the first. A.Bevel gears B.Worm gears C.Helical gears D.Spiral gears 39.The uniform heating of steel above the usual hardening temperatures, followed by cooling freely in air. A.Annealing B.Normalizing C.Hardening D.Tempering 40. The operation of cooling a heated piece of work rapidly by dipping it in water, brine or oil. A.Quenching B.Tempering C.Normalizing D.Annealing 41. A method 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.Queching C.Normalizing D.Annealing 42. The total permissible variation in the size of a dimension; the difference the limits of size. A.Allowance B.Tolerance C.Variance D.Interface 43. The operation of machining the end of a workpiece to make the end square with the axis. A.Squaring B.Buffing C.Lapping D.Honing 44. The clearance between the tooth profiles of a gear tooth. A.Toothspace B.Backlash C.Flank D.Width 45. A mechanism which usually do the indexing in a machine tool. A.Slotter B.Chuck C.Dividing head D.Indexer 46. A material that can wear away a substance softer than itself. A.Phenol B.Abrasive C.Tungsten D.Chromium 47. A cylindrical bar of steel with threads formed around it and grooves or flutes running lengthwise in it, intersecting with the threads to form cutting edges. It is used to cut internal threads. A.Groove B.Lap C.Tap D.Flute 48. A set of gages consisting of thin strips of metal of various thickness mounted in a steel case or holder and is widely used for measuring and A.Feeler checkinggage clearances. B.Depth gage C.Line center gage D.Lay-out gage 49. 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 50. A machine tool used principally to machine flat or plane surfaces with single-point cutting tool. A.Grinder B.Shaper C.Planer D.Turret lathe 51. A kind of bolt which has no head an instead has threads on both ends A.Stud bolts B.ACME threaded bolts C.Square threaded bolts D.Hex bolts 52. A kind of chuck which has reversible jaws which could be adjusted separately. A.Collet chuck B.Independent chuck C.Four jaw chuck D.Two jaw chuck 53. A tool which when pressed into a finished hole in a piece of work, provides centers in which the piece may be turns or otherwise machined. A.Mash B.Butt C.Mandrel D.Wobble 54. A kind of chuck which should not be used where extreme accuracy is required. A.Collet chuck B.Magnetic chuch C.Four jaw chuck D.Universal chuck 55. The process of checking or producing checkers on the surface of a piece by rolling checkered depressions into the surface. A.Knurling B.Hemming C.Breading D.Embossing 56. It fits into the main spindle of a lathe and is so called because it acts as a bearing surface on which the work rests. It revolves with the work. When compared with the hardness of the dead center in the tailstock, it is usually soft, and is so made A.Ram center since it does no work B.Spindle center C.Live center D.Bearing center 57. A gripping device with two or more adjustable jaws set radially. A.Chuck B.Carriage C.Tailstock D.Fan 58. Steel balls for ball bearings are manufactured by: A.Turning B.Rolling C.Casting D.Cold heading I 59. Addendum of a cycloidal gear tooth is: A.Cycloid B.Epicycloids I C.Straight rack D.Involute 60. In a lathe, it comprises the main spindle, the necessary mechanism for obtaining the various spindle speed and also certain gears which are used to operate the quick-change gear mechanism. A.Headstock I B.Carriage C.Tailstock D.Fan 61. The process of heating a piece of steel to a temperature within or above critical range and cooling rapidly. A.Normalizing B.Hardening I C.Annealing D.Tempering 62. Welding operation in which a non- ferrous filler metal melts at a temperature below that of the metal joined but is heated above 450C. A.Gas welding B.Spot welding C.Brazing I D.Steam welding 63. Uniting two pieces of metal by means of a different metal which is applied between the two in molten state. A.Casting B.Welding C.Soldering I D.Brazing 64. Fusion process in which the metal is heated into a state of fusion permitting it to flow together into a solid joint. A.Electric arc welding I B.Gas welding C.Spot welding D.Projection welding 65. Joining metal by means of high current at low voltage. During the passage of current, pressure by the electrodes produces a forge weld. A.Spot welding B.Resistance welding I C.Steam welding D.Gas welding 66. A device for accurately measuring diameters. A.Radiometer B.Profilometer C.Spectrometer D.Micrometer I 67. A group of thin steel strips for measuring clearances. A.Distortion gage B.Feeler gage I C.Line center gage D.Deflection gage 68. A hand tool used to measure engine crank web deflections. A.Distortion gage I B.Feeler gage C.Line center gage D.Deflection gage 69. A hand tool use to measure tension on bolt. A.Indexer B.Torque wrench I C.Torsionmeter D.Tensiometer 70. The permissible variation in the size of a dimension the difference between the limits of size. A.Allowance B.Variance C.Clearance D.Tolerance I 71. A gear with teeth on the cutter cylindrical surface. A.Outer gear B.External gear I C.Spiral gear D.Helical gear 72. The diameter of a circle coinciding with the top of the teeth of an internal gear. A.Pitch diameter B.Root diameter C.Internal diameter I D.Central diamter 73. A circle coinciding with a tangent to the bottom of the tooth space. A.Root circle I B.Pitch circle C.Addendum circle D.Dedndum circle 74. The total depth of a tooth space, equal to addendum plus dedendum. A.Full depth B.Working depth C.Whole depth I D.Dedendum 75. The depth of tooth space below the pitch circle. A.Dedendum I B.Working depth C.Full depth D.Tooth depth 76. The of gear teeth to each mm pitch diameter. A.Diametral pitch I B.Module C.Circular pitch D.English module 77. A machine tool in which abrasive wheel is used as cutting tool to obtain Is very smooth finish. A.Drill B.Grinder I C.Planer D.Shaper 78. It is used to produce a variety of surfaces by using a circular-type cutter with multiple teeth. A.Grinding machine B.Shaper C.Drilling machine D.Milling machine I 79. It is used principally to machine flat or plane surfaces with a single-point tool. A.Drill B.Shaper I C.Planer D.Tool grinder 80. Cutting a hole by means of rotating tool or the work may revolve and to the tool remain fixed as in the lathe. A.Piercing B.Notching C.Boring I D.Preforating 81. One of the following is not a tap used for cutting threads in holes. A.Tapping tap I B.Plug tap C.Taper tap D.Bottoming tap 82. An index or dividing head. A.A part of a drill press B.Used to rotate theI work C.Not used to cut helixes D.Always manually operated 83. Galvanized iron is a term referring to iron coated with: A.Tin B.Zinc I C.Magnesium D.Aluminum 84. The moment of inertia of a rectangle whose base is “b” and height “h” about its base is: A.bh^3/12 B./12 36 C.bh^3/3 I D.bh^3/4 85. In usual spur gearing: A.The pitch circle and the base circle are the same B.Working depth includes the clearance I C.Tooth outline are usually involute curves D.Tooth outline are always cycloidal 86. A stainless steel is obtained principally by the use of the following alloying element. A.Chromium I B.Tungsten C.Carbon D.Phenol 87. One of the following is not a common term relating to the classification of fits. A.Tunking B.Snug C.Medium force fit D.Bound I 88. Herringbone gears are gears which: A.Do not operate on parallel shaft B.Have a line of contact I between the teeth C.Consist of two left handed helical gears D.Tend to produce thrust on the shafts 89. Internal stresses existing in a welded connection: A.Are not relieved I when the weld is peened B.Are not relieved by heat treatment C.May be relieved when the weld is peened D.Are relieved by x-ray analysis 90. In general the design stress and factor of safety are related as follows: A.Design stress = Ultimate stress times factor of safety B.Design stress = I Ultimate stress divided by factor of safety C.Design stress = Design stress divided by Ultimate stress D.Design stress = Factor of safety divided by design stress 91. A group of thin steel strips for measuring clearances A.Depth gage B.Feeler gage I C.Lay-out gage D.Clearance gage 92. A hand tool used to measure tension on bolts. A.Indexer B.Torsionmeter C.Torque wrench I D.Tensiometer 93. A material that can wear away a substance softer than itself. A.Abrasive I B.Corrosive C.Tungsten D.Alloy 94. The material used in high speed process A.High speed steel I B.Chromium C.Cast iron D.Carbon steel 95. An alloy of copper and zinc. A.Chromium B.Bronze C.Brass I D.Aluminum 96. An alloy of copper, tin and small amount of phosphorous. A.Chromium B.Bronze I C.Brass D.Aluminum 97. The process of working metals by the application of sudden blows or by steady pressure. A.Welding B.Extursion C.Forging I D.Swaging 98. A welding operation in which a non- ferrous filler metals melts at a temperature below that of the metal joined but is heated above 450C A.Brazing I B.Spot welding C.Gas welding D.Projection welding 99. The operation of cooling a heated piece of work rapidly by dipping it in water, brine or oil. A.Tempering B.Annealing C.Quenching I D.Normalizing 100. A machine tool used to machine flat surface. A.Shaper I B.Planer C.Grinder D.Lathe