Exam preparation MCQs with answers

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Supercharging is the process of_____________________?
  • (A)  supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
  • (B)  providing forced cooling air
  • (C)  injecting excess fuel for raising more load
  • (D)  supplying compressed air to remove combustion products fully
  • (E)  raising exhaust pressure
The designation M 33 x 2 of a bolt means___________________?
  • (A)  metric threads of 33 nos in 2 cm.
  • (B)  metric threads with cross-section of 33 mm
  • (C)  metric threads of 33 mm outside diameter and 2 mm pitch
  • (D)  bolt of 33 mm nominal diameter having 2 threads per cm
  • (E)  none of the above
Jam 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 a 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 spitted and bent in reverse direction at other end
  • (E)  none of the above