Exercise: Machine Design

Questions for: Machine Design

The average shear stress in the hollow shaft is smaller than the average shear stress in the solid shaft.
A:
True
B:
False
C:
D:
Answer: A
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The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)
A:
B:
C:
D:
Answer: A
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The algebraic difference between the actual size and the corresponding basic size is called actual deviation.
A:
Agree
B:
Disagree
C:
D:
Answer: A
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The difference between the upper limit and lower limit of a dimension is called
A:
nominal size
B:
basic size
C:
actual size
D:
tolerance
Answer: D
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A jam nut is a locking device in which
A:
a thinner nut is tightened down over a thicker or main nut and the main nut is tightened against the thinner nut by loosening
B:
a slot is cut in line with the centre of each face and a split pin passes through two slots in the nut and a hole in the bolt, so that a positive lock is obtained unless the pin shears
C:
a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction
D:
the bottom cylindrical portion is recessed to receive the tip of the locking set screw
Answer: A
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