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311.

In pressurized water cooling. The boiling point of coolant can be increased by increasing its:

A.	Temperature	B.	Pressure
C.	Both (a) & (b)	D.	None of these

312.

In pressurized water-cooling, increasing its pressure can increase the boiling point of coolant:

A.	For 2 bar it is 121 ?C	B.	For 5 bar it is 153 ?C
C.	For 10 bar it is 1180 ?C	D.	All are correct

313.

In pressurized water-cooling the water pressure is kept between:

A.	1.5 and 2 bars	B.	1.5 and 3 bars
C.	1.5 and 5 bars	D.	1.5 and 10 bars

314.

Evaporating cooling system is used for cooling of:

A.	Steam engines	B.	Aircraft engines
C.	Railway engines	D.	Industrial engines

315.

Evaporating cooling is also called:

A.	Steam of vapour cooling	B.	Water cooling
C.	Air cooling	D.	None of these

316.

In evaporating cooling the temperature of cooling water is allowed to reach a temperature of:

A.	50?C	B.	100?C
C.	110?C	D.	130?C

317.

In case of air-cooled engines, the reduction of weight of engines is about:

A.	10 per cent	B.	20 per cent
C.	25 per cent	D.	30 per cent

318.

Volumetric efficiency of air-cooled engines in comparison to water-cooled engines is:

A.	Higher	B.	Lower
C.	Equal	D.	None of these

319.

A cooling system that requires more maintenance is:

A.	Steam of vapour cooling	B.	Water cooling
C.	Air cooling	D.	None of these

320.

The engine performing becomes more sensitive to climatic condition in case of:

A.	Evaporation cooled engine	B.	Water cooled engine
C.	Air cooled engine	D.	All are correct