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Machine Design

Machine Design
In most machine members, the damping capacity of the material should be

Low
High
Zero
Could be anything

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

τ
2 τ
4 τ
τ/2

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Machine Design
A locking device extensively used in automobile industry is a

Jam nut
Castle nut
Ring nut
Sawn nut

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Machine Design
Deep groove ball bearings are used for

Combined thrust and radial loads at high speed
Radial load at high speed
Heavy thrust load only
Small angular displacement of shafts

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Machine Design
Whether any core is required in wire ropes

Rarely
Sometimes
No
Yes

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Machine Design
In a transverse fillet welded joint, the size of weld is __________ the throat of weld.

0.5 times
Double
Equal to
2 times

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