Mechanical Engineering Mcqs
Q Castle nut is a locking device in which__________________?
  • A A. One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
  • B B. A slot is cut partly is middle of nut and then slot reduced by tightening a screw
  • C C. A hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
  • D D. Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
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