I.C. Engines

A. 1 : 1
B. 5 : 1
C. 10:1
D. 15 : 1
E. 20 : 1

A. diesel
B. kerosene
C. fuel oil
D. gasoline
E. lub oil

A. upto 25%
B. upto 35%
C. upto 50%
D. upto 75%
E. upto 100%.

A. maximum pressure developed
B. minimum pressure
C. instantaneous pressure at any instant
D. exhaust pressure
E. average pressure

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

A. diesel engines
B. gas turbines
C. petrol engines
D. aircraft engines
E. marine engines

A. increase efficiency
B. increase power
C. reduce weight and bulk for a given out-put
D. effect fuel economy
E. none of the above

A. equal to stroke volume
B. equal to stroke volume and clearance volume
C. less than stroke volume
D. more than stroke volume
E. more than cylinder volume

A. higher
B. lower
C. remain unaffected
D. unpredictable
E. none of the above

Which of the following is false statement?

A. piston ring and cylinder wear
B. formation of hard coating on piston skirts
C. oil sludge in the engine crank case
D. detonation
E. forms corrosive acids