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Mechanical Engineering · Q268

Machine Design

Engineering and GATE · Mechanical Engineering · question 268

Q268

Elastic nut is a locking device in which

A.
One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B.
A slot is cut partly in middle of nut and then slot reduced by tightening a screw
C.
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
Answer
D.
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

Answer: Option C

Solution

Answer: Option C
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