The antiknock property of compression ignition engine fuel can be improved by adding

Antiknock for compression ignition engines is

A

Napthene

B

Tetra ethyl lead

C

Amyl nitrate

D

Hexadecane

In practice, the compression ratio of compression-ignition (CI) engine ranges from

A

15 to 25

B

5 to 10

C

40 to 55

D

60 to 70

The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to

A

Inject fuel in a chamber of high pressure at the end of compression stroke

B

Inject fuel at a high velocity to facilitate atomization

C

Ensure that penetration is not high

D

All of the above

The pilot of a small aircraft with a 40 gallon fuel tank wants to fly to Cleveland , which is 480 miles engine , which can fly only 8 miles per gallon, will not get him there , By how many miles per gallon must the aircraft's fuel efficiency be improved to make the fight to Cleveland possible?

A

160

B

12

C

40

D

4

If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about

A

17 : 1

B

15 : 1

C

13 : 1

D

10 : 1

The most accurate ignition system of a spark ignition engine is

A

Magneto system

B

Battery system

C

Electronic control unit system

D

Magneto and electronic system

The ignition in a spark ignition engine takes place when the piston is

A

Exactly at the T.D.C. position on its compression stroke

B

Approaching the T.D.C. position on its compression stroke

C

Leaving the T.D.position on its compression stroke

D

Approaching the T.D.C. position on its exhaust stroke

The auto ignition in a spark ignition engine means

A

Automatic ignition of the charge at the end of compression

B

Ignition induced by the passage of a spark

C

Ignition of the charge before the passage of flame front

D

Ignition induced to supplement the process of normal combustion

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

Which of the following does not relate to a compression ignition engine?

A

Fuel pump

B

Fuel injector

C

Governor

D

Carburetor

The antiknock property of compression ignition engine fuel can be improved by adding

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