E6

Question 1

1. 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

Answer 1

C. 15o

Question 2

2. Laser beam machining process is used to machine

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

Answer 2

B. Thinner materials

Question 3

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 3

B. 10 to 50 microns

Question 4

4. In collet, the included angle of taper is usually

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

Answer 4

C. 30o

Question 5

5. Straight fluted drill are used to drill ______ materials.

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

Answer 5

A. Soft

Question 6

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 6

B. Five times their diameter

Question 7

7. A hard grade grinding wheel is suitable for grinding

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

Answer 7

B. Soft materials

Question 8

8. The relative motion of work piece in planning is

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

Answer 8

B. Translatory

Question 9

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 9

D. 0.00025 mm

Question 10

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 10

B. Crank length

Question 11

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 11

A. Nickel

Question 12

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 12

B. Aluminum

Question 13

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 13

D. Siderite

Question 14

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

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

Answer 14

D. Steel

Question 15

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 15

A. Brass

Question 16

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 16

B. Bronze

Question 17

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 17

A. Open-hearth furnace

Question 18

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 18

A. UNC

Question 19

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 19

D. Efficiency

Question 20

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 20

A. Aluminum

Question 21

21. 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

Answer 21

A. 3:20

Question 22

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 22

A. 0.125 mm

Question 23

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 23

D. 800 amps/cycle of work piece area

Question 24

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 24

C. 3 – 20 V

Question 25

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 25

B. D = 2.5d to 3d

Question 26

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 26

C. Load on the bearing

Question 27

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 27

A. Positive rake angle

Question 28

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 28

B. Negative rake angle

Question 29

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

Answer 29

B. Low

Question 30

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 30

A. Light cuts

Question 31

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 31

C. Cast iron

Question 32

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 32

A. Heavy load

Question 33

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 33

C. Plastic

Question 34

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 34

D. Embeddability

Question 35

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

Answer 35

D. Toughness

Question 36

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

Answer 36

A. Bevel

Question 37

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

Answer 37

C. Rubberized

Question 38

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 38

C. Plane of rotation

Question 39

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

Answer 39

B. SAE 4XXX

Question 40

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

Answer 40

D. Carbon

Question 41

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

Answer 41

A. Plowing action

Question 42

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 42

A. Cutting oils

Question 43

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

Answer 43

B. Lead pencil

Question 44

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 44

D. All of these

Question 45

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 45

D. Any of these

Question 46

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 46

D. Any of these

Question 47

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

Answer 47

D. All of these

Question 48

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

Answer 48

A. Cold pressing

Question 49

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 49

D. Nitriding

Question 50

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 50

B. Feeler gauge

Question 51

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 51

A. Shaper machine

Question 52

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

Answer 52

D. Sulfurite

Question 53

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 53

A. Stress

Question 54

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 54

A. Tensile strength

Question 55

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 55

A. Bending strength

Question 56

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 56

A. Fatigue strength

Question 57

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 57

D. Impact strength

Question 58

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

Answer 58

A. Ductility

Question 59

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 59

A. Lathe machine

Question 60

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 60

B. Impact strength

Question 61

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 61

B. Creep

Question 62

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 62

A. Flash point

Question 63

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

Answer 63

C. Jumping

Question 64

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 64

D. Cast iron

Question 65

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 65

A. Drifting

Question 66

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 66

B. Drawing out

Question 67

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

Answer 67

C. High speed steel

Question 68

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

Answer 68

D. Slotter

Question 69

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

Answer 69

B. Boring

Question 70

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

Answer 70

D. Center drilling

Question 71

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 71

A. Low carbon steel

Question 72

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 72

C. Medium carbon steel

Question 73

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 73

B. High carbon steel

Question 74

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 74

D. Very high carbon steel

Question 75

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 75

D. Nickel

Question 76

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 76

C. Molybdenum

Question 77

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 77

B. Manganese

Question 78

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 78

A. Chromium

Question 79

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 79

B. Tungsten

Question 80

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 80

B. Cobalt

Question 81

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 81

A. Counter sinking

Question 82

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 82

C. Spot facing

Question 83

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

Answer 83

B. Grit

Question 84

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

Answer 84

D. Alloy steel

Question 85

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 85

B. Hardening

Question 86

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 86

C. More than

Question 87

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

Answer 87

D. Plain milling

Question 88

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

Answer 88

A. Shaper

Question 89

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 89

D. Angular indexing

Question 90

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 90

B. Up milling

Question 91

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 91

A. Tempering

Question 92

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 92

A. Nitriding

Question 93

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 93

A. Ferrous metals

Question 94

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

Answer 94

D. Red iron

Question 95

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 95

C. White iron

Question 96

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 96

C. Non-ferrous metals

Question 97

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 97

A. Nodular iron

Question 98

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 98

B. Malleable iron

Question 99

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 99

A. Cast iron

Question 100

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 100

A. Hematite