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Machine Design

Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

None of these
Twice
Half
Thrice

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Machine Design
The resultant axial load on a bolt depends on

Relative elastic yielding (springness) of the bolt and the connected member
External load applied
Initial tension
All of these

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Machine Design
The material commonly used for crane hooks is

Aluminium
Wrought iron
Mild steel
Cast iron

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Machine Design
In designing a key, it is assumed that the distribution of forces along the length of key

Is uniform throughout
Varies linearly
Varies exponentially, being less at the torque-input end
Varies exponentially, being more at the torque-input end

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Machine Design
The included angle for the British Association thread is

60°
55°
29°
47.3°

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Machine Design
The acme threads are usually found on

Spindles of bench vices
Railway carriage couplings
Feed mechanism of machine tools
Screw cutting lathes

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