Liquid Cooling Systems

·         In liquid cooling, the cylinder walls and heads are provided with jackets through which the cooling liquid can circulate.

Answer: True

·         In liquid cooling, the liquid becomes heated in its passage through the jackets and is itself cooled by means of an air-cooled radiator system.

Answer: True

·         The coolant to be employed in liquid cooling system should have

Answer: The coolant to be employed in liquid cooling system should have
a) low freezing temperature
b) a high boiling point
c) a large latent heat of vaporisation
d) non-corrosive
e) easily and cheaply available.

·         Anti-freeze mixtures are added to fuel in extreme winter seasons to lower its freezing temperatures below the danger point.

Answer: No, but actually, anti-freeze mixtures are added to water in extreme winter seasons to lower its freezing temperatures below the danger point.

·         Commonly used anti-freeze materials are

Answer: Commonly used anti-freeze materials are
a) denatured alcohol
b) wood alcohol
c) glycerin
d) kerosene
e) sugar solution
f) calcium or magnesium chloride
g) ethylene glycol and proplene glycol.

·         The various methods used for circulating water around the cylinder and cylinder heads are

Answer: The various methods used for circulating water around the cylinder and cylinder heads are
a) thermo-syphon cooling
b) forced or pump cooling
c) cooling with thermostatic regulator
d) pressurized water cooling
e) evaporative cooling.

·         The thermo-syphon cooling system can be used in high output engines due to its inability to meet the requirement of large flow rates of water.

Answer: In fact, the thermo-syphon cooling system are avoided to be used in high output engines due to its inability to meet the requirement of large flow rates of water.

·         In thermo-syphon cooling system, the cooling only depends on temperature and is independent of the engine speed.

Answer: True

·         The circulation of water starts only after the engine has become hot enough to cause thermo-syphon.

Answer: True

·         The main disadvantage of forced cooling is that cooling is ensured under all conditions of operation.

Answer: No, but actually, it is the main advantage of forced cooling is that cooling is ensured under all conditions of operation.

·         Components of water cooling system are

Answer: Components of water cooling system are
a) water jacket
b) water pump
c) fan
d) thermostat
e) connecting hoses
f) radiators
g) radiator cap.