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291.

In a four stroke SI engine the inlet valve opens

A.	at TDC and closes at BDC	B.	10? before TDC and closes 10? after BDC
C.	10? before TDC and closes 10? after BDC	D.	10? before TDC and closes 50? after BDC

292.

The quantity of oil delivered by injection pump in diesel engine is controlled by

A.	upward movement of control helix	B.	downward movement of control helix
C.	rotation of control helix	D.	none of the above

293.

Magneto ignition system is used in scooters and motor cycles because

A.	it is less costly	B.	it is less bulky and requires less maintenance
C.	it gives higher voltage across the terminals of spark plug	D.	none of the above

294.

The spark advance in SI engine is adjusted to obtain maximum pressure

A.	10 - 12? past TDC	B.	at TDC
C.	10 - 12? before TDC	D.	none of the above

295.

Which one of the following is independent of fuel constituents, combustion chamber design, temperature and pressure of compressed charge

A.	Pinking	B.	Pre-ignition
C.	Knocking	D.	none of the above

296.

The function of condenser in the ignition circuit of an SI engine is

A.	to interrupt the battery current	B.	to enhance the circuit voltage
C.	to avoid arcing at the contact breaker and to cause faster decay of primary current	D.	none of the above

297.

Ignition advance in S.I. engine is not the direct function of

A.	mixture strength	B.	compression ratio
C.	grade of petrol	D.	load on engine

298.

The condenser in ignition circuit of an S.I. engine

A.	increases the battery voltage	B.	decreases the current from battery
C.	avoids arcing at contact breaker	D.	none of the above

299.

Generally speaking for better efficiency of IC engine the valves must

A.	open before the beginning of a stroke and close before the end of a stroke	B.	open after the beginning of a stroke and close before the end of a stroke
C.	open after the beginning of a stroke and close after the end of a stroke	D.	open before the beginning of a stroke and close after the end of a stroke

300.

Highest useful compression ratio is an indicator of

A.	knocking of a fuel at a particular pressure	B.	knocking of a fuel at a particular temperature
C.	knocking of a fuel in a particular engine	D.	knocking of a fuel under specified conditions in a standard engine