Machine Design
When a metal or alloy is cold worked,

Both (A) and (B)
It is worked below recrystallization temperature
Its hardness and strength increases
None of these

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Machine Design
A fast and loose pulley drive is used when

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

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