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81.

In a Diesel engine the function of a fuel injector is

A.	To mix fuel and air	B.	To ignite air-fuel mixture
C.	To provide flame front for ignition	D.	To spray atomized fuel in the cylinder
E.	To provide adequate air fuel mixture for combustion

82.

The escape of burned gases from the combustion chamber past the pistons and into the crank case is called

83.

In the cam the distance between the base circle and the nose is called

84.

The valve is opened as the cam lobe on the cam raises the

85.

In a Diesel engine the duration between the time of injection and the time of ignition is called

86.

Dirt or gum in fuel nozzle or jets may cause

87.

Deposit of carbon in the exhaust system

A.	Will increase back pressure	B.	Will reduce back pressure
C.	Will have no effect on back pressure	D.	Will result in black smoke
E.	Will increase noise level

88.

Oil pan is attached

A.	To the bottom of the cylinder block	B.	In a separate unit away from the crankcase
C.	At the top of the cylinder block	D.	At the outside wall of the crank case
E.	Adjacent to oil filters

89.

Aluminium cylinder blocks require

90.

The function of oil scraper rings is to