Machine Design
The function of cutting oil when threading a pipe is to

Help removes chips
Lubricate the dies
All of these
Provide cooling action

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Machine Design
A bolt of M 24 × 2 means that

The nominal diameter of bolt is 24 mm and pitch is 2 mm
The effective diameter of bolt is 24 mm and there are 2 threads per cm
Cross-sectional area of the threads is 24 mm²
The pitch of the thread is 24 mm and depth is 2 mm

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Machine Design
When the belt is transmitting maximum power,

The tension in slack side is equal to the centrifugal tension
None of these
The tension in tight side is twice the centrifugal tension
The tension in tight side is thrice the centrifugal tension

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Machine Design
A fast and loose pulley drive is used when

Shafts are arranged at right angles and rotate in one definite direction
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

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