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MD ELEMENTS PER 50 > E5_51-100 > Flashcards

E5_51-100 Flashcards

1
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

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2
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

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3
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

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4
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

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5
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

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6
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

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7
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

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8
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

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9
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

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10
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

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11
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

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12
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%

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13
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

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14
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

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15
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

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16
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

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17
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

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18
Q
  1. The main constituent molding sand is

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

A

D. Silicon

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19
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

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20
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

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21
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

22
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

23
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

24
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

25
75. The minimum number of teeth on a smaller sprocket for low speed is: A. 12 B. 21 C. 17 D. 14
A. 12
26
76. The minimum number of teeth on a smaller sprocket for moderate speed is: A. 17 B. 21 C. 12 D. 14
A. 17
27
77. The minimum number of teeth on a smaller sprocket for high speed is: A. 21 B. 24 C. 12 D. 14
A. 21
28
78. The resultant of a pair of equal forces but opposite in direction is called: A. Concurrent B. Couple C. Non-concurrent D. Resultant
B. Couple
29
79. 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
D. 340/350
30
80. 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. 1.5
31
81. 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
B. Cooling slowly in water
32
82. 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
D. Any of the above, depending on type and use
33
83. The purpose of annealing is to make a metal A. Harder B. Medium hard C. Softer D. Shiny
C. Softer
34
84. The purpose of tempering is to make the metal A. Harder B. Softer C. Less brittle D. More brittle
C. Less brittle
35
85. A scriber is made of A. Carbon steel B. Cold-rolled steel C. Hot-rolled steel D. Tool steel
D. Tool steel
36
86. Knurling is done to A. Polish material B. Roughen material C. Sharpen the material D. Smoothen material
B. Roughen material
37
87. Muntz metal contains which of the following alloys? A. Copper - nickel B. Copper – zinc C. Copper – tin D. Copper – aluminum
B. Copper – zinc
38
88. A reinforced concrete beam is considered to be made up of: A. Clad material B. Composite material C. Homogeneous material D. Heterogeneous
D. Heterogeneous
39
89. In testing a material for endurance strength t is subjected to: A. Static load B. Impact load C. Dynamic load D. Completely reversed load
D. Completely reversed load
40
90. Which of the following is not a sound absorptive material? A. Rug B. Mirror C. Carpet D. Heavy drape
B. Mirror
41
91. 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
D. Resultant
42
92. All forces in the same plane are called: A. Coplanar B. Couple C. Parallel D. Resultant
A. Coplanar
43
93. 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
B. Law of gravitational
44
94. 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
D. The initial velocity
45
95. 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. Life will be shortened
46
96. 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
B. % Elongation
47
97. SAE 51XXX belongs to the _______ steel family. A. Carbon B. Chromium C. Manganese D. Nickel
B. Chromium
48
98. 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
C. Lead
49
99. Gasket material, which should avoid hot liquid/steam applications? A. Asbestos fiber B. Nylon fiber C. Rubberized D. Wool
C. Rubberized
50
100. 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
D. Isotropic

MD ELEMENTS PER 50 (10 decks)

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