The rating of C.I. engine fuel (Diesel) is given by

A certain truck uses 18 gallons of diesel fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck's fuel mileage be increased.

A

12

B

15

C

27

D

9

In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

A

250°C

B

500°C

C

1000°C

D

2000°C

The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is

A

Same

B

More

C

Less

D

Less or more depending on operating conditions

The cetane rating of Diesel fuel is in the order of

A

25

B

45

C

70

D

90

The rating of a diesel engine, with increase in air inlet temperature, will

A

Increase linearly

B

Decrease linearly

C

Increase parabolically

D

Decrease parabolically

In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency.

A

Not effected

B

Decrease

C

Increase

D

None of these

In a diesel engine, fuel is ignited by ----

A

Spark plug

B

Heat resulting from Compressing air that is supplied for combustion

C

Combustion Chamber

D

Injected fuel

The specific fuel consumption per BHP hour for diesel engine is approximately

A

0.15 kg

B

0.2 kg

C

0.25 kg

D

0.3 kg

An hmh flame speed is obtained in diesel engine when air fuel ratio is

A

Uniform throughout the mixture

B

Chemically correct mixture

C

About 35% of rich mixture

D

About 10% of rich mixture

The expansion of fuel in a four stroke cycle diesel engine

A

Starts at 15° before top dead center and ends at 30° after top dead center

B

Starts at top dead center and ends at 30° after top dead center

C

Starts at 15° after top dead center and ends at 30° before bottom dead center

D

May start and end anywhere

The rating of C.I. engine fuel (Diesel) is given by

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