Machine Design
The valve rod in a steam engine is connected to an eccentric rod by

Cotter joint
Knuckle joint
Universal coupling
Bolted joint

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Machine Design
When a belt drive is transmitting maximum power,

Driving tension on tight side is twice the centrifugal tension
Effective tension is equal to centrifugal tension
Effective tension is half of centrifugal tension
Driving tension on slack side is equal to centrifugal tension

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