Machine Design
At low temperatures (say 75°C) the notched bar impact value of steel

Depends on heat treatment carried out
Increases markedly
Remain same
Decreases markedly

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Machine Design
A compound belt drive is used when

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

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