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271.

The castor is called positive when

A.	the top of the king pin axis is inclined to the rear of the vehicle	B.	the top of the king pin axis is inclined to the front of the vehicle
C.	the top of the king pin axis is inclined to the left of the vehicle	D.	the top of the king pin axis is inclined to the right of the vehicle

272.

During idling in a CI engine, the air fuel ratio may be of the order of

273.

Which fuel has maximum resistance to detonation

274.

Efficiency of an IC engine is normally of the order of

A.	30-35%	B.	10-15%
C.	50-60%	D.	80-90%

275.

The most popular firing order in case of cylinder in-line IC engine is

A.	1-2-3-4	B.	4-3-2-1
C.	1-3-4-2	D.	1-4-2-3

276.

Ignition quality of petrol is expressed by

A.	Calorific value	B.	Octane no
C.	Cetane no	D.	Mass/volume ratio

277.

Indicated power of 4-stroke engine is

A.	PLAN
C.	2 x PLAN	D.	1/4 x PLAN

278.

The tendency of a petrol engine to knock increases by

A.	Turbo-charging	B.	Super-charging
C.	Cataytic converter	D.	Addition of lead

279.

The gear ratio in the differential unit of a passenger car is of the order of

280.

Morse Test in multicylinders is used to determine