第六章
What is the cooling agent in the liquid cooling system? ( )
答案:coolant The water pump uses ( ) to send fluid to the outside while it spins, causing fluid to be drawn from the center continuously.
答案:centrifugal force
The cooling system of a water-cooled engine consists of the engine’s water jacket, a（ ）and radiator cap, a cooling fan (electric or belt-driven), hoses, and usually an expansion (overflow) tank.
答案:radiator;thermostat ;water pump
The cooling system is designed to work all the time when the engine is running.（ ）
答案:错
Some engines are coated the inside of the top of the cylinder head with a thin layer of ceramic to reduce the amount of heat that is transferred from the combustion chamber to the metal parts of the engine. （ ）
答案:对
