Mechanical Engineering Mcqs

In a typical medium speed 4-stroke cycle diesel engine________________?
  • (A)  compression starts at 35° after bottom dead center and ends at top dead center
  • (B)  compression starts at bottom dead center and ends at top dead center
  • (C)  compression starts at 10° before bottom dead center and, ends just before top dead center
  • (D)  may start and end anywhere
  • (E)  none of the above
In a typical medium speed 4 stroke cycle diesel engine_______________?
  • (A)  exhaust valve opens at 35° before bot-tom dead center and closes at 20° after top dead center
  • (B)  exhaust valve opens at bottom ‘dead center and closes at top dead center
  • (C)  exhaust valve opens just after bottom dead center and closes just before top dead center
  • (D)  may open and close anywhere
  • (E)  none of the above is true