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311.

The exhaust value remains open approximately for

A.	160?	B.	180?
C.	190?	D.	235?

312.

The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

A.	indicator diagram	B.	value timing diagram
C.	axial force diagram	D.	None of the above

313.

Which one of the followings is used in C.I. engines?

A.	spark plug	B.	injector
C.	cross-head	D.	none of the above

314.

In case of petrol engine, pre-ignition of the charge during compression stroke is

A.	not possible	B.	possible
C.	possible during power stroke	D.	none of the above

315.

The angle during which both the inlet and exhaust valves remain open simultaneously, is known as

A.	exhaust value angle	B.	value angle
C.	value overlap	D.	none of the above

316.

The value overlap in case of four stroke petrol engine is approximately

A.	30?	B.	60?
C.	90?	D.	120?

317.

The exhaust gases are driven out from engine cylinder by the fresh charge of the fuel enter in the cylinder, in case of

A.	Petrol engine	B.	Diesel engine
C.	Four stroke I.C. engines	D.	Two-stroke I.C. engines

318.

The knocking C.I engines is characterised by the sudden auto-ignition of the mixture

A.	at the end of the combustion process	B.	in the middle of combustion process
C.	at the very beginning of the combustion process	D.	none of the above

319.

If the first element of the fuel and C.I. air is having high temperature and a short ignition delay, then knocking will

A.	accelerate	B.	decrease
C.	remain constant	D.	none of the above

320.

The phenomenon by which a fuel catches fire without external flame is known as

A.	pre-ignition	B.	detonation
C.	ignition lag	D.	auto-ignition