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Machine Design

Machine Design
Rankine Gordon formula for buckling is valid for

Short column
Very long column
Short and long column
Long column

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Machine Design
If two springs are in parallel then their overall stiffness will be

None of these
Double
Half
Same

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Machine Design
In V-belt drive, belt touches

At bottom
At sides only
Could touch anywhere
Both at bottom and sides

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Machine Design
For a square key made of mild steel, the shear and crushing strength are related as

Shear strength is greater than crushing strength
None of these
Shear strength is equal to crushing strength
Shear strength is less than crushing strength

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Machine Design
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

18
14
12
24

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Machine Design
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

A combination of bending stress and direct shear stress
Direct shear stress only
Bending stress only
A combination of torsional shear stress and bending

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