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Machine Design

Machine Design
The groove angle of the pulley for rope drive is usually

45°
60°
35°
20°

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Machine Design
Auto frettage is the method of

Joining thick cylinders
Pre-stressing thick cylinders
Increasing the life of thick cylinders
Calculating stresses in thick cylinders

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Machine Design
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

Less
More
None of these
Same

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Machine Design
The maximum bending stress in a curved beam having symmetrical section always occur at the

Neutral axis
Inside fiber
Centroidal axis
Outside fiber

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Machine Design
In cyclic loading, stress concentration is more serious in

Elastic materials
Ductile materials
Brittle as well as ductile materials
Brittle materials

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Machine Design
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves

None of these
Axially downwards
Axially upwards or downwards
Axially upwards

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