Machine Design
In case of thick cylinders, the tangential stress across the thickness of cylinder is

Maximum at the inner surface and minimum at the outer surface
Maximum at the inner surface and zero at the outer surface
Maximum at the outer surface and minimum at the inner surface
Maximum at the outer surface and zero at the inner surface

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Machine Design
Turn buckle has

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

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