Volatility of diesel fuel oil is_________________?

A. Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
B. Temperature at which it solidifies or congeals
C. It catches fire without external aid
D. Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

The following volume of air is required for consuming 1 liter of fuel by a four stroke engine_______________?

A. 1 m3
B. 5 m3
C. 5-6 m3
D. 9-10 m3

Air fuel ratio at which a petrol engine can not work is_________________?

A. 8 : 1
B. 10 : 1
C. 15 : 1
D. 20 : 1 and less

The theoretically correct air fuel ratio for petrol engine is of the order of___________________?

A. 6 : 1
B. 9 : 1
C. 12 : 1
D. 15 : 1

Scavenging is usually done to increase__________________?

A. Thermal efficiency
B. Speed
C. Power output
D. Fuel consumption

For the same power developed in I.C. engines, the cheaper system is_____________?

A. Naturally aspirated
B. Supercharged
C. Centrifugal pump
D. Turbo charger

Flash point of fuel oil is __________________?

A. Minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
B. Temperature at which it solidifies or congeals
C. Temperature at which it catches fire without external aid
D. Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off

The operation of forcing additional air under pressure in the engine cylinder is known as________________?

A. Scavenging
B. Turbulence
C. Supercharging
D. Pre-ignition

The magneto in an automobile is basically__________________?

C. Transformer
B. D.c. generator
C. Capacitor
D. Magnetic circuit

Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows ________________?

A. Using additives in the fuel
B. Engine derating i.e. reducing the maxi-mum flow of fuel
C. Increasing the compression ratio
D. Adherence to proper fuel specification