Machine Design
In case of pressure vessels having closed ends, the fluid pressure induces

Circumferential stress
Longitudinal stress
Shear stress
None of these

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Machine Design
A compound belt drive is used when

Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Shafts are arranged parallel and rotate in the opposite directions
None of these

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Machine Design
Which of the following statement is correct regarding power screws?

Both (A) and (B)
If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%
The efficiency of a self locking screw can not be more than 50%
The efficiency of Acme (trapezoidal) thread is less than that of a square thread

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