Machine Design
Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?

Bushed pin type coupling
All of these
Universal coupling
Oldham coupling

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Machine Design
Elastic nut is a locking device in which

Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
A slot is cut partly in middle of nut and then slot reduced by tightening a screw
One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

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