ELEMENTS 6 Flashcards by alyssa everlyn evangelista

The recommended value of the rake angle for machining aluminum with cutting tools made up of cemented carbide tool

A. 5o
B. 10o
C. 15o
D. 25o

C. 15o

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Laser beam machining process is used to machine

A. Thicker materials
B. Thinner materials
C. Heavier materials
D. Stronger materials

B. Thinner materials

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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

B. 10 to 50 microns

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In collet, the included angle of taper is usually

A. 10o
B. 20o
C. 30o
D. 40o

C. 30o

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Straight fluted drill are used to drill ______ materials.

A. Soft
B. Hard
C. Thin
D. Thick

A. Soft

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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

B. Five times their diameter

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A hard grade grinding wheel is suitable for grinding

A. Hard materials
B. Soft materials
C. Both materials
D. None of these

B. Soft materials

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The relative motion of work piece in planning is

A. Rotary
B. Translatory
C. Rotary and translatory
D. None of these

B. Translatory

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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

D. 0.00025 mm

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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

B. Crank length

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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

A. Nickel

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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

B. Aluminum

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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

D. Siderite

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Which of the following is not considered to be precious metal?

A. Silver
B. Gold
C. Platinum
D. Steel

D. Steel

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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

A. Brass

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It is a copper tin alloy and is named either bell metal or brown metal.

A. Brass
B. Bronze
C. Muntz metal
D. Silver

B. Bronze

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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

A. Open-hearth furnace

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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

A. UNC

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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

D. Efficiency

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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

A. Aluminum

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The usual ratio of forward and return stroke in quick return mechanism of shaping machine is

A. 3:20
B. 3:1
C. 3:4
D. 3:5
Answer: A

A. 3:20

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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

A. 0.125 mm

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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

D. 800 amps/cycle of work piece area

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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

C. 3 – 20 V

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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

B. D = 2.5d to 3d

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

C. Load on the bearing

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

A. Positive rake angle

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

B. Negative rake angle

29. Coefficient of friction in anti-friction guide ways is: A. High B. Low C. Medium D. None of these

B. Low

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

A. Light cuts

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

C. Cast iron

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

A. Heavy load

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

C. Plastic

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

D. Embeddability

35. What do impact tests measure? A. Compactness B. Ductility C. Plasticity D. Toughness

D. Toughness

36. Which of the following types of gear transmit power at a certain angle? A. Bevel B. Helix C. Herringbone D. Spur

A. Bevel

37. Which of the following gasket material is not used for high temperature? A. Asbestos B. Plastic nylon C. Rubberized D. Wool

C. Rubberized

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

C. Plane of rotation

39. Which of the following is the specification of molybdenum alloy? A. SAE 3XXX B. SAE 4XXX C. SAE 5XXX D. SAE 6XXX

B. SAE 4XXX

40. Which of the following is abundant ferrous metals? A. Sulfur B. Phosphorus C. Manganese D. Carbon

D. Carbon

41. At very low cutting speeds the tool wear is due to A. Plowing action B. Transfer C. Material D. Temperature

A. Plowing action

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

A. Cutting oils

43. How is aluminum work piece marked? A. Ball pen B. Lead pencil C. Crayon D. Chalk

B. Lead pencil

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

D. All of these

45. What is the material of hacksaw blade? A. High carbon steel B. High speed steel C. Low tungsten steel D. Any of these

D. Any of these

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

D. Any of these

47. Files are classified according to A. Size or length B. Shape C. Grade and cut D. All of these

D. All of these

48. How are rivets made? A. Cold pressing B. Rolling C. Drawing D. None of these

A. Cold pressing

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

D. Nitriding

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

B. Feeler gauge

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

A. Shaper machine

52. All of these are classifications of iron ore; except what? A. Magnetite B. Hematite C. Siderite D. Sulfurite

D. Sulfurite

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

A. Stress

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

A. Tensile strength

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

A. Bending strength

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

A. Fatigue strength

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

D. Impact strength

58. The ability of the material to stretch, bend or twist without breaking or cracking. A. Ductility B. Malleability C. Hardness D. Compressibility

A. Ductility

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

A. Lathe machine

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

B. Impact strength

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

B. Creep

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

A. Flash point

63. It is the process by which the length of a work piece is reduced. A. Drawing B. Drifting C. Jumping D. Upsetting

C. Jumping

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

D. Cast iron

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

A. Drifting

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

B. Drawing out

67. Shaper tools are made of what type of material? A. Brass B. Bronze C. High speed steel D. Babbit

C. High speed steel

68. A _____ is a reciprocating type tool used for machining flat, cylindrical and irregular surfaces. A. Shaper B. Planer C. Puncher D. Slotter

D. Slotter

69. An operation to enlarge the previous drilled hole A. Drilling B. Boring C. Reaming D. Broaching

B. Boring

70. An operation to make smaller hole in exact center for lathe center. A. Broaching B. Reaming C. Counter boring D. Center drilling

D. Center drilling

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

A. Low carbon steel

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

C. Medium carbon steel

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

B. High carbon steel

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

D. Very high carbon steel

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

D. Nickel

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

C. Molybdenum

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

B. Manganese

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

A. Chromium

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

B. Tungsten

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

B. Cobalt

81. It is the operation of bevelling the mouth of a hole A. Counter sinking B. Counter boring C. Spot facing D. Counter boring

A. Counter sinking

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

C. Spot facing

83. The size of abrasive grains produced by crushing process is called A. Grade B. Grit C. Peebles D. None of these

B. Grit

84. It is the combination of iron, carbon and other alloying elements. A. Cast iron B. Brass C. Carbon steel D. Alloy steel

D. Alloy steel

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

B. Hardening

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

C. More than

87. It is also known as slab peripheral milling A. Form milling B. Climb milling C. Convex milling D. Plain milling

D. Plain milling

88. In ______ the tool is released in return stroke. A. Shaper B. Planer C. Slotter D. Reamer

A. Shaper

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

D. Angular indexing

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

B. Up milling

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

A. Tempering

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

A. Nitriding

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

A. Ferrous metals

94. All these are basic kinds of cast iron, EXCEPT: A. Gray iron B. Malleable iron C. White iron D. Red iron

D. Red iron

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

C. White iron

96. How do you call metals that have no carbon content? A. Ferrous metals B. Malleable iron C. Non-ferrous metals D. White iron

C. Non-ferrous metals

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

A. Nodular iron

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

B. Malleable iron

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

A. Cast iron

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

A. Hematite