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MD ELEMENTS PER 50 v2 > E6_1 > Flashcards

E6_1 Flashcards

1
Q
  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

A

C. 15o

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2
Q
  1. Laser beam machining process is used to machine

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

A

B. Thinner materials

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3
Q
  1. 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

A

B. 10 to 50 microns

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

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

A

C. 30o

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

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

A

A. Soft

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6
Q
  1. 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

A

B. Five times their diameter

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7
Q
  1. A hard grade grinding wheel is suitable for grinding

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

A

B. Soft materials

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8
Q
  1. The relative motion of work piece in planning is

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

A

B. Translatory

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9
Q
  1. 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

A

D. 0.00025 mm

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10
Q
  1. 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

A

B. Crank length

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11
Q
  1. 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

A. Nickel

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12
Q
  1. 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

A

B. Aluminum

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13
Q
  1. 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

A

D. Siderite

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

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

A

D. Steel

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15
Q
  1. 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

A. Brass

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16
Q
  1. It is a copper tin alloy and is named either bell metal or brown metal.

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

A

B. Bronze

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17
Q
  1. 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

A. Open-hearth furnace

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18
Q
  1. 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

A. UNC

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19
Q
  1. 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

A

D. Efficiency

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20
Q
  1. 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

A. Aluminum

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21
Q
  1. 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

A. 3:20

22
Q
  1. 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

A. 0.125 mm

23
Q
  1. 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

A

D. 800 amps/cycle of work piece area

24
Q
  1. 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

A

C. 3 – 20 V

25
Q
  1. 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

A

B. D = 2.5d to 3d

26
Q
  1. 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

A

C. Load on the bearing

27
Q
  1. 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

A. Positive rake angle

28
Q
  1. 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

A

B. Negative rake angle

29
Q
  1. Coefficient of friction in anti-friction guide ways is:

A. High
B. Low
C. Medium
D. None of these

A

B. Low

30
Q
  1. 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

A. Light cuts

31
Q
  1. 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

A

C. Cast iron

32
Q
  1. 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

A. Heavy load

33
Q
  1. 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

A

C. Plastic

34
Q
  1. 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

A

D. Embeddability

35
Q
  1. What do impact tests measure?

A. Compactness
B. Ductility
C. Plasticity
D. Toughness

A

D. Toughness

36
Q
  1. Which of the following types of gear transmit power at a certain angle?

A. Bevel
B. Helix
C. Herringbone
D. Spur

A

A. Bevel

37
Q
  1. Which of the following gasket material is not used for high temperature?

A. Asbestos
B. Plastic nylon
C. Rubberized
D. Wool

A

C. Rubberized

38
Q
  1. 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

A

C. Plane of rotation

39
Q
  1. Which of the following is the specification of molybdenum alloy?

A. SAE 3XXX
B. SAE 4XXX
C. SAE 5XXX
D. SAE 6XXX

A

B. SAE 4XXX

40
Q
  1. Which of the following is abundant ferrous metals?

A. Sulfur
B. Phosphorus
C. Manganese
D. Carbon

A

D. Carbon

41
Q
  1. At very low cutting speeds the tool wear is due to

A. Plowing action
B. Transfer
C. Material
D. Temperature

A

A. Plowing action

42
Q
  1. 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

A. Cutting oils

43
Q
  1. How is aluminum work piece marked?

A. Ball pen
B. Lead pencil
C. Crayon
D. Chalk

A

B. Lead pencil

44
Q
  1. 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

A

D. All of these

45
Q
  1. What is the material of hacksaw blade?

A. High carbon steel
B. High speed steel
C. Low tungsten steel
D. Any of these

A

D. Any of these

46
Q
  1. 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

A

D. Any of these

47
Q
  1. Files are classified according to

A. Size or length
B. Shape
C. Grade and cut
D. All of these

A

D. All of these

48
Q
  1. How are rivets made?

A. Cold pressing
B. Rolling
C. Drawing
D. None of these

A

A. Cold pressing

49
Q
  1. 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

A

D. Nitriding

50
Q
  1. 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

A

B. Feeler gauge

MD ELEMENTS PER 50 v2 (10 decks)

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