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Machine Design

Machine Design
A transmission shaft includes

All of these
Line shaft
Counter shaft
Over head shaft

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Machine Design
The arms of the pulleys for flat belt drive have

Elliptical cross-section
All the three characteristics
Major axis in plane of rotation
Major axis twice the minor axis

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Machine Design
Belt slip may occur due to

Driving pulley too small
Heavy load
Loose belt
All of these

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Machine Design
A cotter joint is used to connect two __________ rods.

None of these
Perpendicular
Co-axial
Parallel

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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

2 τ
τ/2
τ
4 τ

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Machine Design
When two helical springs of equal lengths are arranged to form a cluster spring, then

Shear stress in each spring will be equal
Only A is correct
Load taken by each spring will be half the total load
Both A and B is correct

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