Exercise: Machine Design

Questions for: Machine Design

Oldham coupling is used to transmit power between two parallel shafts which are slightly offset.
A:
True
B:
False
C:
D:
Answer: A
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In block brakes, the ratio of shoe width to wheel diameter is taken between
A:
0.1 and 0.25
B:
0.25 and 0.50
C:
0.50 and 0.75
D:
0.75 and 1
Answer: B
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If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
A:
Maximum principal stress theory
B:
Maximum shear stress theory
C:
Maximum strain energy theory
D:
Maximum distortion energy theory
Answer: A
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The diameter of washer is generally taken bigger than the nut size.
A:
True
B:
False
C:
D:
Answer: A
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In levers, leverage is the ratio of
A:
load lifted to the effort applied
B:
mechanical advantage to the velocity ratio
C:
load arm to the effort arm
D:
effort arm to the load arm
Answer: D
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