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Machine Design

Machine Design
The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.

Lighter
Moderate
Heavier
None of these

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Machine Design
The stress in the threaded part of the bolt will be __________ as compared to the shank.

Same
None of these
Higher
Lower

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Machine Design
Whether any core is required in wire ropes

Yes
Sometimes
No
Rarely

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Machine Design
In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.

Intersecting and non-parallel
Non-intersecting and non-parallel
None of these
Intersecting

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Machine Design
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

A combination of torsional shear stress and bending
Direct shear stress only
A combination of bending stress and direct shear stress
Bending stress only

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Machine Design
According to maximum normal stress theory, the maximum normal stress in the shaft is

√(σ² × 4τ²)
σ + √(σ² × 4τ²)
(1/2) × √(σ² × 4τ²)
(1/2) × [σ + √(σ² × 4τ²)]

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