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Machine Design

Machine Design
The groove angle of pulleys for V-belt is

More than 400
420 to 450
300 to 320
340 to 360

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Machine Design
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

Dynamic load
Completely reversed load
Static load
Static as well as dynamic load

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Machine Design
Which of the following spring is used in mechanical wrist watch?

Torsion spring
Helical compression spring
Spiral spring
Belleville spring

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

Shear
Compression
Tension
All of these

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Machine Design
Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

4
8
2
16

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

None of these
Co-axial
Parallel
Perpendicular

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