Machine Design
The property of a material which enables it to resist fracture due to high impact loads is known as

Endurance
Elasticity
Strength
Toughness

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Machine Design
An open belt drive is used when

Shafts are arranged at right angles and rotate in one definite direction
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
Shafts are arranged parallel and rotate in the opposite directions

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