Exam preparation MCQs with answers

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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 fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
  • (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
  • (E)  none of the above
Split nut is a locking device in which_________________?
  • (A)  one smaller 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 screw
  • (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)  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 the other end
  • (E)  none of the above
Compression ratio of LC. engines is ___________________?
  • (A)  the ratio of volumes of air in cylinder before compression stroke and after compression stroke
  • (B)  volume displaced by piston per stroke and clearance volume in cylinder
  • (C)  ratio of pressure after compression and before compression
  • (D)  swept volume/cylinder volume
  • (E)  cylinder volume/swept volume