Machine Design
The contact ratio is the ratio of

Length of arc of recess to the circular pitch
Length of arc of contact to the circular pitch
Length of arc of approach to the circular pitch
Length of path of contact to the circular pitch

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Machine Design
The creep in the belt is due to

Effect of temperature on belt
Stresses beyond elastic limit of belt material
Material of belt
Unequal extensions in the belt due to tight and slack side tensions

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Machine Design
The elasticity is the property of a material which enables it to

Retain deformation produced under load permanently
Regains its original shape after deformation when the external forces are removed
Resists fracture due to high impact loads
Draw into wires by the application of a tensile force

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Machine Design
Turn buckle has

No threads
Right hand threads on bout ends
Left hand threads on both ends
Left hand threads on one end and right hand threads on other end

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