Engine Cooling System

·         The gasoline engine requires much ____________ air than a diesel engine.

Answer: As gasoline engine works on the mixture of air and gasoline, therefore the gasoline engine requires much more air than a diesel engine.

·         The turbocharged diesel engine requires ____________ cooling air than naturally aspired diesel engines.

Answer: As the turbocharged engine produce less heat so, the turbocharged diesel engine requires less cooling air than naturally aspired diesel engines.

·         The heat flow to water jackets, on an average, is about ____________ for large engines.

Answer: The heat flow to water jackets, on an average, is about 4200 kJ/kW-h for large engines and it is about 500-5700 kJ/kW-h for small engines.

·         The heat flow to water jackets, on an average, is about ____________ for small engines.

Answer: The heat flow to water jackets, on an average, is about 500-5700 kJ/kW-h for small engines and is about 4200 kJ/kW-h for large engines.

·         The outlet cooling water temperature for large engines is

Answer: The outlet cooling water temperature for large engines is about 50ºC and the outlet cooling water temperature for medium engines is 60 to 65ºC.

·         The outlet cooling water temperature for medium engines is

Answer: The outlet cooling water temperature for medium engines is 60 to 65ºC and the outlet cooling water temperature for small engines is 80ºC.

·         The outlet cooling water temperature for small engines is

Answer: The outlet cooling water temperature for small engines is 80ºC while the outlet cooling water temperature for medium engines is 60 to 65ºC and the outlet cooling water temperature for small engines is 80ºC.

·         In thermo-syphon system, the radiator should be kept well above the engine, to provide a height for natural circulation.

Answer: True