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471.

Which of the following part is not common between a steam engine and a petrol engine?

472.

A four wheel drive automobile has

473.

Ignition accelerators are often used for

474.

Ignition accelerators are used primarily to

A.	Reduce exhaust temperature	B.	Convert carbon monoxide into carbon dioxide
C.	Reduce combustion knock	D.	Cool the engine cylinder
E.	All of the above

475.

The gas used for cooling the conductors of large generators is

476.

The higher the temperature required to ignite diesel fuel,

A.	the higher the octane number	B.	Lower the octane number
C.	Higher the cetane number	D.	Lower the cetane number

477.

Which of the following engine indicator has least inertia effects?

A.	Mechanical indicator	B.	Farnborough indicator
C.	CRO engine indicator	D.	All of the above

478.

Which of the following offers best resistance to knocking in S.I. engines?

A.	Aromatics	B.	Paraffins
C.	Olefins	D.	Naphthenes

479.

In a petrol engine fuel lock generally occurs in

A.	Pump	B.	suction manifold
C.	inlet valve	D.	gauge lines

480.

The amount of exhaust gases in clearance space left after exhaust stroke, varies with

A.	air-fuel ratio of charger	B.	Speed and load of the engine
C.	Bore and length of cylinder	D.	Clearance volume