Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following______________?

WhiCh of the following is false statement?


D. None of these

The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be________________?

A. Higher
B. Lower
C. Remain unaffected
D. Unpredictable

The actual volume of fresh charge admitted in 4-stroke petrol engine is_________________?

A. Equal to stroke volume
B. Equal to stroke volume and clearance volume
C. Less than stroke volume
D. More than stroke volume

The reason for supercharging in any engine is to________________?

A. Increase efficiency
B. Increase power
C. Reduce weight and bulk for a given out-put
D. Effect fuel economy

Supercharging is essential in_____________?

A. Diesel engines
B. Gas turbines
C. Petrol engines
D. Aircraft engines

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

The mean effective pressure obtained from engine indicator indicates the________________?

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

Installation of supercharger on a four-cycle diesel engine can result in the following percentage increase in power_____________?

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

Which of the following is the lightest and most volatile liquid fuel________________?

A. Diesel
B. Kerosene
C. Fuel oil
D. Gasoline

Air fuel ratio for idling speed of a petrol engine is approximately_________________?

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