Theory of Machine
Creep in belt drive is due to

Material of the pulley
Material of the belt
Uneven extensions and contractions due to varying tension
Larger size of the driver pulley

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Theory of Machine
In elliptical trammels

One pair turning and three pairs sliding
Three pairs turning and one pair sliding
All four pairs are turning
Two pairs turning and two pairs sliding

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Theory of Machine
In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then

The drive is recommended depending upon the torque transmitted
Both open belt drive and crossed belt drive is recommended
Crossed belt drive is recommended
Open belt drive is recommended

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