Exercise: Machine Design

Questions for: Machine Design

A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.
A:
smaller
B:
greater
C:
D:
Answer: B
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Which of the following statement is correct regarding power screws?
A:
The efficiency of a self locking screw can not be more than 50%
B:
The efficiency of Acme (trapezoidal) thread is less than that of a square thread
C:
If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%
D:
(A) and (B) Only
Answer: D
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The dynamic tooth load is due to
A:
inaccuracies of tooth spacing
B:
irregularities in tooth profiles
C:
deflections of teeth under load
D:
all of these
Answer: D
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The maximum efficiency of a square threaded screw is
A:
B:
C:
D:
Answer: A
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A cotter joint is used to transmit
A:
axial tensile load only
B:
axial compressive load only
C:
combined axial and twisting loads
D:
axial tensile or compressive loads
Answer: D
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