The compression ratio for Diesel engines is

The compression ratio for Diesel engines usually lies in the range of

A

6 - 10

B

10 - 15

C

15 - 25

D

25 - 40

The Diesel engines as compared to petrol engines require

A

Bigger flywheel

B

Smaller flywheel

C

Same size of flywheel

D

No flywheel

The pressure at the end of compression, in diesel engines, is approximately

A

10 bar

B

20 bar

C

25 bar

D

35 bar

The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will

A

Increase

B

Decrease

C

Be independent

D

May increase or decrease depending on other factors

In diesel engine, the compression ratio in comparison to expansion ratio is

A

Same

B

Less

C

More

D

Variable

Highest useful compression ratio (HUCR) is the highest compression ratio at which the

A

Engine can run

B

Engine gives maximum output

C

Engine is most efficient

D

Fuel can be used in a test engine without knocking

The efficiency of the dual combustion cycle for the same compression ratio is __________ Diesel cycle.

A

Greater than

B

Less than

C

Equal to

D

None of these

For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.

A

Greater than

B

Less than

C

Equal to

D

None of these

A diesel engine has compression ratio from

A

6 to 10

B

10 to 15

C

15 to 25

D

25 to 40

The compression ratio in petrol engine is kept less than in Diesel engine because

A

It makes petrol engines lighter

B

Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

C

Less compression ratio gives better performance

D

It is just customary to have less compression ratio in petrol engines

The compression ratio for Diesel engines is

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