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MD ELEMENTS 1-5 > ELEMENTS 5 > Flashcards

ELEMENTS 5 Flashcards

1
Q
  1. The process of increasing the carbon content to surface of steel by exposing it to hot carbonaceous material above the transformation of 1650 to 17500F.

A. Carbonitriding
B. Case hardening
C. Carburing
D. Induction hardening

A

C. Carburing

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2
Q
  1. In the SAE identification code of steel shafting the 3rd and 4th digits represents the content of:

A. % of manganese in the steel
B. % of alloy
C. % of carbon content
D. % of chromium in the steel

A

C. % of carbon content

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3
Q
  1. It is associated with nickel steel.

A. Magensium
B. Lead
C. Columbium
D. Tin

A

D. Tin

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4
Q
  1. A non-magnetic metal is:

A. Nodular iron
B. Manganese steel
C. Tungsten – molybdenum steel
D. All of these

A

B. Manganese steel

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5
Q
  1. In small quantity this alloy is effective for improvement strength at high temperature.

A. Chromium
B. Manganese
C. Selenium
D. Molybdenum

A

A. Chromium

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6
Q
  1. T of carbon and alloy used in production of precision work tools.

A. Chrome – manganese
B. Titanium
C. High speed steel
D. Chrome – molybdenum

A

C. High speed steel

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7
Q
  1. Powder metallurgy, the process of heating the cold pressed metal powder is called:

A. Deposition
B. Granulation
C. Precipitation
D. Sintering

A

D. Sintering

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8
Q
  1. Electro-forming is especially valuable for:

A. Decorative items
B. Good conductors of electricity
C. Non-ferrous components
D. Thin walled parts requiring a high order of accuracy and internal surface finish

A

D. Thin walled parts requiring a high order of accuracy and internal surface finish

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9
Q
  1. Aluminum alloys for pressure die casting.

A. Must possess considerable fluidity
B. Must not be free from hot shortness
C. Must have iron as one of the constituents
D. Must be light

A

A. Must possess considerable fluidity

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10
Q
  1. In carbon steel castings.

A. The percentage for alloying elements is controlled
B. The percentage of carbon is between 1.7% to 2%
C. The percentage of carbon is less than 1.7%
D. None of the above

A

C. The percentage of carbon is less than 1.7%

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11
Q
  1. The minimum value of numerical combined shock and fatigue factor to be applied in every case to the computed bending moment of the shaft is:

A. 2.0
B. 1.75
C. 1.5
D. 1.3

A

C. 1.5

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12
Q
  1. What is the other name given to short shafts on machines?

A. Spindles
B. Head shafts
C. Cores shafts
D. All of these

A

A. Spindles

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13
Q
  1. The other name given to a line shaft is:

A. Countershaft
B. Main shaft
C. Long shaft
D. Head shaft

A

B. Main shaft

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14
Q
  1. The speed at which the center of mass will be equal the deflecting forces on the shaft, the shaft with its attached bodies will then vibrate violently, since the centrifugal force changes its direction as the shaft turns in.

A. Nominal speed
B. Critical speed
C. Relative speed
D. Mean speed

A

B. Critical speed

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15
Q
  1. An old rule of thumb for transmission shafting is that the deflection should not exceed ____ of length between supports.

A. 0.01 in. per foot
B. 0.08 in. per foot
C. 0.02 in. per foot
D. 0.05 in. per foot

A

A. 0.01 in. per foot

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16
Q
  1. For transmission shafts, the allowable deflection is 1 degree in a length of ____ diameters.

A. 20
B. 25
C. 30
D. 40

A

A. 20

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17
Q
  1. What is the limiting torsional deflection for machinery shafts. If the criteria of limiting torsional deflection vary from 0.080 per foot of length.

A. 10
B. 2.50
C. 20
D. 3.50

A

A. 10

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18
Q
  1. Bevel gears of sizes 5 in. to 15 in. should not be lift or depress more than _____ as Gleason statement.

A. 0.004
B. 0.003
C. 0.002
D. 0.001

A

B. 0.003

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19
Q
  1. What type of key that allows the hub to move along the shaft but prevents the rotation of the
    shaft?

A. Woodruf key
B. Feather key
C. Gibbs key
D. Square key

A

B. Feather key

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20
Q
  1. What is the other name for Kennedy key?

A. Tangential key
B. Woodruf key
C. Saddle key
D. Rollpin

A

A. Tangential key

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21
Q
  1. It has a powerful softening effect on cast iron and its pressure in cast iron reduces the ability of the iron to retain carbon in chemical combination.

A. Aluminum
B. Carbon
C. Silicon
D. Sulphur

A

C. Silicon

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22
Q
  1. Cyaniding is the process of:

A. Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
B. Dipping steel in cyanide bath
C. Obtaining cyanide salts
D. Reacting steel surface with cyanide salts

A

A. Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness

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23
Q
  1. An engineer’s hammer is made of

A. Cast iron
B. High speed steel
C. Forged steel
D. Mild steel

A

C. Forged steel

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24
Q
  1. A cold chisel is made of:

A. Cast iron
B. High carbon steel
C. High speed steel
D. Mild steel

A

B. High carbon steel

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25
Q
  1. Eutectoid steel the percentage of carbon is:

A. 0.02%
B. 0.30%
C. 0.63%
D. 0.80%

A

D. 0.80%

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26
Q
  1. Machining properties of steel can be improved by adding:

A. Chromium, nickel
B. Silicon, aluminum, titanium
C. Sulfur, lead, phosphorus
D. Vanadium, aluminum

A

C. Sulfur, lead, phosphorus

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27
Q
  1. The ability of a material to absorb energy when deformed elastically and to return it when unloaded is known as:

A. Creep
B. Fatigue strength
C. Hardness
D. Resilience

A

D. Resilience

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28
Q
  1. A ductile fracture is characterized by

A. Appreciable plastic deformation prior to propagation of crack
B. Fragmentation into more than two pieces
C. Negligible deformation
D. Rapid rate for crack propagation

A

A. Appreciable plastic deformation prior to propagation of crack

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29
Q
  1. Of metals where in strength of metal is increased and the ductility increases the heating at a relatively low temperature after cold working.

A. Cluster
B. Screw dislocation
C. Solid solution hardening
D. Strain aging

A

D. Strain aging

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30
Q
  1. The material recovers its original dimensions, when the load is removed, it is called:

A. Annealed
B. Brittle
C. Elastic
D. Plastic

A

C. Elastic

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31
Q
  1. What type of fits used for involute spline?

A. Close fit
B. Press fit
C. Sliding fit
D. All of these

A

D. All of these

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32
Q
  1. It is used for permanent fits and similar to involute splines except that the pressure angle is 14.50.

A. Separation load
B. Spline shaft
C. Stub serrations
D. Involute serrations

A

D. Involute serrations

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33
Q
  1. It is used a coupling, or in addition to another couplings where in case of overload, there is danger of injury to machine or to material in process.

A. Shear pin
B. Flange coupling
C. Involute serrations
D. King pin

A

A. Shear pin

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34
Q
  1. What is the maximum shaft angle for a single Hooke’s coupling?

A. 100
B. 170
C. 150
D. 200

A

C. 150

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35
Q
  1. What are the two principal parts of a journal bearing?

A. Bearing and journal
B. Shaft and Babbitt
C. Clearance and fitted
D. Shaft and cylinder

A

A. Bearing and journal

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36
Q
  1. When the line of action of the load bisects the arc of partial bearing, the bearing is said to be:

A. Eccentrically loaded
B. Fully loaded
C. Centrally loaded
D. Partially loaded

A

C. Centrally loaded

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37
Q
  1. What is the difference in radii of the bearing and journal?

A. Even clearance
B. Clearance ratio
C. Odd clearance
D. Radial clearance

A

D. Radial clearance

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38
Q
  1. When radii of both the bearing and the journal are the same, then the bearing is said to be:

A. Fitted bearings
B. Clearance bearing
C. Full bearing
D. Ambiguous bearing

A

A. Fitted bearings

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39
Q
  1. What is the line that passes through the centers of the bearing and the journal?

A. Line of action
B. Line of centers
C. Line of symmetry
D. Tangent line

A

B. Line of centers

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40
Q
  1. Which of the following is considered advantageous for bearing materials?

A. Conformability
B. Compatibility
C. Embeddability
D. All of these

A

D. All of these

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41
Q
  1. A body having identical properties all over is called:

A. Ductile
B. Elastic
C. Homogeneous
D. Isentropic

A

C. Homogeneous

42
Q
  1. Points of arrest of iron correspond to:

A. Stages at which allotropic forms change
B. Stages at which further heating does not increase temperature for sometime
C. Stages at which properties do not change with increase in temperature
D. There is nothing like points of arrest

A

A. Stages at which allotropic forms change

43
Q
  1. Delta iron occurs at:

A. Temperature above melting point
B. Temperature between 14000C and 15390C
C. Temperature between 10000C and 14000C
D. Room temperature

A

B. Temperature between 14000C and 15390C

44
Q
  1. Gamma iron exists at the temperature range.

A. Between 9100C and 14000C
B. Between 14000C and 15390C
C. Near melting point
D. Room temperature

A

A. Between 9100C and 14000C

45
Q
  1. Ferromagnetic alpha iron exists in temperature range of:

A. Below 7230C
B. 700 – 9100C
C. 1000 – 14400C
D. 1400 – 15390C

A

A. Below 7230C

46
Q
  1. The mould for casting ferrous materials in continuous melting process is made of:

A. Low carbon steel
B. Medium carbon steel
C. High carbon steel
D. Copper

A

D. Copper

47
Q
  1. A silver refers to

A. The pointed location spot silver plated
B. The point on an instrument dial a reading beyond which may be dangerous for the system
C. The temperature at which silver melts
D. The temperature of equilibrium between solid silver and liquid silver at normal atmospheric pressure

A

D. The temperature of equilibrium between solid silver and liquid silver at normal atmospheric pressure

48
Q
  1. Piston compression rings are made of

A. Aluminum
B. Bronze
C. Cast iron
D. White metal

A

C. Cast iron

49
Q
  1. One of the materials used for making surface plate is

A. Brass
B. Granite
C. Stainless steel
D. Wood

A

B. Granite

50
Q
  1. Cast iron contains _____% carbon

A. 0.05 to 0.30
B. 0.30 to 0.60
C. 0.60 to 1.30
D. 2 to 4

A

D. 2 to 4

51
Q
  1. A conclusion repeatedly verified by experiment is that the smoother surface.

A. Has the greater load capacity of the bearing
B. Has the lesser capacity of the bearing
C. Has constant load
D. None of these

A

A. Has the greater load capacity of the bearing

52
Q
  1. Which of the following considers the 200 series of bearing?

A. Heavy
B. Medium
C. Light
D. All of these

A

C. Light

53
Q
  1. Which of the following considers the 300 series of bearing?

A. Medium
B. Heavy
C. Light
D. All of these

A

B. Heavy

54
Q
  1. A type of roller bearing in which the balls are assembled by the eccentric displacement of the inner ring.
    A. Shallow groove ball bearing
    B. Filling-slot ball bearing
    C. Self-aligning ball bearing
    D. Deep-groove bearing
A

D. Deep-groove bearing

55
Q
  1. Which of the following is not a type of ball bearing?

A. Shallow groove ball bearing
B. Filling-slot ball bearing
C. Self-aligning ball bearing
D. Deep-groove ball bearing

A

A. Shallow groove ball bearing

56
Q
  1. Which of the following is the approximate density of the leather belt?

A. 0.035 lb/in.3
B. 0.0135 lb/in.3
C. 0.025 lb/in.3
D. 0.0465 lb/in.3

A

A. 0.035 lb/in.3

57
Q
  1. Which of the following is the approximate density of a fat rubber belt?

A. 0.055 lb/in.3
B. 0.0135 lb/in.3
C. 0.045 lb/in.3
D. 0.0465 lb/in.3

A

C. 0.045 lb/in.3

58
Q
  1. A toothed wheel whose tooth elements are straight and parallel to the shaft axis or used to transmit motion and power between parallel shafts.

A. Helical gear
B. Spur gear
C. Worm gear
D. Bevel gear

A

B. Spur gear

59
Q
  1. The breaking strength of oak-tanned beltings varies from 3 to more than.

A. 5 ksi
B. 6 ksi
C. 7 ksi
D. 9 ksi

A

B. 6 ksi

60
Q
  1. Experience suggests that the most economical designs are obtained for a belt speed of:

A. 6000 to 7500 fpm
B. 3000 to 5000 fpm
C. 3500 to 4700 fpm
D. 5000 to 1000 fpm

A

A. 6000 to 7500 fpm

61
Q
  1. Tungsten in high speed steel imparts which of the following characteristics?

A. Corrosion resistance
B. Ductility
C. Red hardness
D. Shock resistance

A

C. Red hardness

62
Q
  1. High carbon steel has a carbon content of:

A. 0.5 to 1%
B. 0.8 to 2%
C. 1 to 3%
D. 2%

A

B. 0.8 to 2%

63
Q
  1. During tensile testing on a specimen cup and cone formation is observed with ___.

A. Cast iron
B. Cast steel
C. Glass
D. Mild steel

A

D. Mild steel

64
Q
  1. Kerosene is used as coolant, while machining which material?

A. Aluminum
B. Cast iron
C. Mild steel
D. Stainless

A

B. Cast iron

65
Q
  1. One of the following materials is commonly used for bearings?

A. Aluminum
B. Gun metal
C. Steel
D. Zinc

A

B. Gun metal

66
Q
  1. Babbitt metal is an alloy of:

A. Tin, copper, antimony and lead
B. Copper, zinc and tin
C. Iron and tungsten
D. Tin, copper, lead and phosphorus

A

A. Tin, copper, antimony and lead

67
Q
  1. The bed of machine tool is normally made of

A. Alloy steel
B. Cast iron
C. Medium carbon steel
D. Mild steel

A

B. Cast iron

68
Q
  1. The main constituent molding sand is

A. Carbon
B. Clay
C. Graphite
D. Silicon

A

D. Silicon

69
Q
  1. Cobalt is added to high speed steel to

A. Increase ductility
B. Increase fatigue strength
C. Increase hot hardness
D. Increase wear resistance

A

C. Increase hot hardness

70
Q
  1. During cold working metals are worked.

A. Below room temperature
B. Below their melting point
C. Below their recrystallization temperature
D. Below 2000C

A

C. Below their recrystallization temperature

71
Q
  1. The tension in the belt due to centrifugal force increasing rapidly above about:

A. 2500 fpm
B. 3000 fpm
C. 3500 fpm
D. 4000 fpm

A

A. 2500 fpm

72
Q
  1. For leather belts, recommended speed is:

A. 6000 to 7000 fpm
B. 5000 to 6000 fpm
C. 7000 to 8000 fpm
D. 4500 to 5600 fpm

A

C. 7000 to 8000 fpm

73
Q
  1. The recommended initial tension of the belt is:

A. 75 lb/in of width
B. 73 lb/in of width
C. 71 lb/in of width
D. 80 lb/in of width

A

C. 71 lb/in of width

74
Q
  1. Two shafts at right angles to each other may be connected by what arrangement.

A. Half turn
B. Quarter turn
C. ¾ turn
D. One turn

A

B. Quarter turn

75
Q
  1. The minimum number of teeth on a smaller sprocket for low speed is:

A. 12
B. 21
C. 17
D. 14

A

A. 12

76
Q
  1. The minimum number of teeth on a smaller sprocket for moderate speed is:

A. 17
B. 21
C. 12
D. 14

A

A. 17

77
Q
  1. The minimum number of teeth on a smaller sprocket for high speed is:

A. 21
B. 24
C. 12
D. 14

A

A. 21

78
Q
  1. The resultant of a pair of equal forces but opposite in direction is called:

A. Concurrent
B. Couple
C. Non-concurrent
D. Resultant

A

B. Couple

79
Q
  1. The helical and herringbone gear teeth cut after heat treatment should have a hardness in the range of 210/300 BHN. The pinion gear teeth hardness on the other hand, ideally/normally should be at _____ BHN.

A. 250/320
B. 350/380
C. 400
D. 340/350

A

D. 340/350

80
Q
  1. As a rule, the center to center distance between sprocket should not be less than ______ times the diameter of the bigger sprocket and not less than 30 times the pitch nor more than about 50 times to pitch.

A. 1.5
B. 2
C. 2.5
D. 3

A

A. 1.5

81
Q
  1. Copper is annealed by heating to a cherry red color and

A. Dousing in cold water
B. Cooling slowly in water
C. Dousing in oil
D. Dousing in hot water

A

B. Cooling slowly in water

82
Q
  1. Tool steel can be hardened by

A. Heating red hot and plunging into water
B. Heating red hot and cooling in a blast of dry
C. Heating red hot and plunging into linseed or cotton seed oil
D. Any of the above, depending on type and use

A

D. Any of the above, depending on type and use

83
Q
  1. The purpose of annealing is to make a metal

A. Harder
B. Medium hard
C. Softer
D. Shiny

A

C. Softer

84
Q
  1. The purpose of tempering is to make the metal

A. Harder
B. Softer
C. Less brittle
D. More brittle

A

C. Less brittle

85
Q
  1. A scriber is made of

A. Carbon steel
B. Cold-rolled steel
C. Hot-rolled steel
D. Tool steel

A

D. Tool steel

86
Q
  1. Knurling is done to

A. Polish material
B. Roughen material
C. Sharpen the material
D. Smoothen material

A

B. Roughen material

87
Q
  1. Muntz metal contains which of the following alloys?

A. Copper - nickel
B. Copper – zinc
C. Copper – tin
D. Copper – aluminum

A

B. Copper – zinc

88
Q
  1. A reinforced concrete beam is considered to be made up of:

A. Clad material
B. Composite material
C. Homogeneous material
D. Heterogeneous

A

D. Heterogeneous

89
Q
  1. In testing a material for endurance strength t is subjected to:

A. Static load
B. Impact load
C. Dynamic load
D. Completely reversed load

A

D. Completely reversed load

90
Q
  1. Which of the following is not a sound absorptive material?

A. Rug
B. Mirror
C. Carpet
D. Heavy drape

A

B. Mirror

91
Q
  1. A single force, which produces the same effect upon a mass as two or several forces acting together is called:

A. Components
B. Composition of forces
C. Resolution of forces
D. Resultant

A

D. Resultant

92
Q
  1. All forces in the same plane are called:

A. Coplanar
B. Couple
C. Parallel
D. Resultant

A

A. Coplanar

93
Q
  1. Which of the following laws which states that the force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to distance square between their centers.

A. Hooke’s law
B. Law of gravitational
C. Law of motion
D. Newton’s law

A

B. Law of gravitational

94
Q
  1. Any object thrown upward will return to earth with the magnitude of the terminal velocity equal to:

A. 50% of the initial velocity
B. 80% of the initial velocity
C. About 90% of the initial velocity
D. The initial velocity

A

D. The initial velocity

95
Q
  1. Flat belt that is too tight will induce strain on the bearing and belt ______.

A. Life will be shortened
B. Result to uneconomical operation
C. Suffer/shatter
D. Will be sheared/cut

A

A. Life will be shortened

96
Q
  1. The resulting cross-sectional area of the tensile test specimen divided by the specimen original area is called:

A. Charpy test
B. % Elongation
C. Impact test
D. Izod test

A

B. % Elongation

97
Q
  1. SAE 51XXX belongs to the _______ steel family.

A. Carbon
B. Chromium
C. Manganese
D. Nickel

A

B. Chromium

98
Q
  1. In itself, it is a lubricant and usually one of the important elements in casting non-ferrous metals like bronze, for example.

A. Antimony
B. Babbitt
C. Lead
D. Zinc

A

C. Lead

99
Q
  1. Gasket material, which should avoid hot liquid/steam applications?

A. Asbestos fiber
B. Nylon fiber
C. Rubberized
D. Wool

A

C. Rubberized

100
Q
  1. The same material properties all over/direction and at any particular point in a structural member is:

A. Heterogeneous
B. Homogeneous
C. Isentropic
D. Isotropic

A

D. Isotropic

MD ELEMENTS 1-5 (5 decks)

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