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Machine Design

Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Tension
Shear
Compression
All of these

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Machine Design
For tight leakage joints, following type of thread is best suited

Buttress
NPT (national pipe threads).
Metric
Square

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Machine Design
For maximum power, the velocity of the belt will be

√(T/3m)
√(T/2m)
None of these
√(T/m)

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Machine Design
The valve rod in a steam engine is connected to an eccentric rod by

Cotter joint
Universal coupling
Knuckle joint
Bolted joint

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Machine Design
The shock absorbing capacity of a bolt may be increased by

Tightening the bolt properly
Decreasing its shank diameter
Increasing its shank diameter
Making the shank diameter equal to core diameter of thread

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Machine Design
The process extensively used for making bolts and nuts is

Cold peening
Cold heading
Hot piercing
Extrusion

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