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Machine Design

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

Shear
All of these
Compression
Tension

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Machine Design
Wahl's stress factor __________ very rapidly as the spring index decreases.

None of these
Decreases
Remain same
Increases

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Machine Design
In unilateral system of tolerance, the tolerance is allowed on

Both sides of the nominal size
Both sides of the actual size
One side of the nominal size
One side of the actual size

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Machine Design
Lewis equation is applied

Only to the gear
To weaker of the pinion or gear
Only to the pinion
To stronger of the pinion or gear

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Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

Helical gearing
None of these
Bevel gearing
Worm gearing

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Machine Design
In order to withstand resistance to wear, the best profile of gear is

20° involute stub tooth
14½° stub tooth
20° full depth involute tooth
14½° full depth involute tooth

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