Exercise: Machine Design

Questions for: Machine Design

The effective stress in wire ropes during normal working is equal to the stress due to
A:
axial load plus stress due to bending
B:
acceleration/retardation of masses plus stress due to bending
C:
axial load plus stress due to acceleration/retardation
D:
bending plus stress due to acceleration/retardation
Answer: A
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In worm, gears, pitch lead angle is
A:
half the angle between two inclined faces in axial plane
B:
the angle between the tangent to the pitch helix and the plane of rotation
C:
the angle between the tangent to the pitch helix and an element of the cylinder
D:
none of the above
Answer: B
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The resilience of a bolt may be increased by
A:
increasing its shank diameter
B:
increasing its length
C:
decreasing its shank diameter
D:
decreasing its length
Answer: B
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The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.
A:
equal to
B:
less than
C:
more than
D:
Answer: C
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The radial stress across the thickness of a thick cylinder is maximum at the inner surface and zero at the outer surface.
A:
True
B:
False
C:
D:
Answer: A
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