The object of providing masked inlet valve in the air passage of compression ignition engines is to

The size of inlet valve of an engine in comparison to exhaust valve is

A

More

B

Less

C

Same

D

More/less depending on capacity of engine

The compression ignition engines are governed by

A

Hit and miss governing

B

Qualitative governing

C

Quantitative governing

D

Combination of (B) and (C)

In compression ignition engines, swirl denotes a

A

Haphazard motion of the gases in the chamber

B

Rotary motion of the gases in the chamber

C

Radial motion of the gases in the chamber

D

None of the above

In order to eliminate knocking in compression ignition engines, there should be

A

Short delay period

B

Late auto-ignition

C

Low compression ratio

D

High self ignition temperature of fuel

The delay period in compression ignition engines depends upon

A

Temperature and pressure in the cylinder at the time of injection

B

Nature of the fuel mixture strength

C

Relative velocity between the fuel injection and air turbulence pressure of residual gases

D

All of the above

The knocking tendency in compression ignition engines for a given fuel will be

A

Enhanced by decreasing compression ratio

B

Enhanced by increasing compression ratio

C

Dependent on other factors

D

None of the above

The combustion in compression ignition engines is

A

Homogeneous

B

Heterogeneous

C

Both (A) and (B)

D

None of these

Combustion in compression ignition engines is

A

Homogeneous

B

Heterogeneous

C

Both (A) and (B)

D

Laminar

Antiknock for compression ignition engines is

A

Napthene

B

Tetra ethyl lead

C

Amyl nitrate

D

Hexadecane

The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency.

A

Increase

B

Reduce

C

Not effect

D

None of these

The object of providing masked inlet valve in the air passage of compression ignition engines is to

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