The combustion in compression ignition engines is

Combustion in compression ignition engines is

A

Homogeneous

B

Heterogeneous

C

Both (A) and (B)

D

Laminar

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

A

Enhance flow rate

B

Control air flow

C

Induce primary swirl

D

Induce secondary turbulence

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

Antiknock for compression ignition engines is

A

Napthene

B

Tetra ethyl lead

C

Amyl nitrate

D

Hexadecane

The best fuels for compression ignition engines are

A

Straight chain paraffin

B

Aromatics

C

Branched chain paraffin

D

Naphthalene

The combustion in compression ignition engines is

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