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49.

The maximum temperature in the I.C. engine cylinder is of the order of                        
A. 500- 1000°C B. 1000- 1500°C
C. 1500-2000°C D. 2000-2500°C



50.

The minimum cranking speed in case of petrol engine is about                        
A. half the operating speed B. one-fourth of operating speed
C. 250-300 rpm D. 60-80 rpm



51.

The operation of forcing additional air under pressure in the engine cylinder is known as                        
A. scavenging B. turbulence
C. supercharging D. pre-ignition




52.

The pressure and temperature at the end of compression stroke in a petrol engine are of the order of                        
A. 4 - 6 kg/cm2 and 200 - 250°C B. 6 - 12 kg/cm2 and 250 - 350°C
C. 12 - 20 kg/cm2 and 350 - 450°C D. 20 - 30 kg/cm2 and 450 - 500°C



53.

The rating of a diesel engine, with increase in air-intlet temperature, will                        
A. increase linearly B. decrease linearly
C. increase parabolically D. decrease parabolically



54.

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



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