Exercise: Machine Design

Questions for: Machine Design

In case of thick cylinders, the tangential stress across the thickness of cylinder is
A:
maximum at the outer surface and minimum at the inner surface
B:
maximum at the inner surface and minimum at the outer surface
C:
maximum at the inner surface and zero at the outer surface
D:
maximum at the outer surface and zero at the inner surface
Answer: B
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In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of
A:
combined effect of transverse shear stress and bending stress in the wire
B:
combined effect of bending stress and curvature of the wire
C:
combined effect of transverse shear stress and curvature of wire
D:
combined effect of torsional shear stress and transverse shear stress in the wire
Answer: B
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According to Indian standards, total number of fundamental deviations are
A:
10
B:
15
C:
20
D:
25
Answer: D
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When compared to the rod of the same diameter and material, a wire rope
A:
is less flexible
B:
has a much smaller load carrying capacity
C:
does not provide much warning before failure
D:
provides much greater time for remedial action before failure
Answer: B
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In a marine flange coupling, the pitch circle diameter of bolts is taken as
A:
1.2 d
B:
1.6 d
C:
2 d
D:
2.5 d
Answer: B
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