第六章单元测试
- What is the cooling agent in the liquid cooling system? ( )
- The water pump uses ( ) to send fluid to the outside while it spins, causing fluid to be drawn from the center continuously.
- 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.
- The cooling system is designed to work all the time when the engine is running.（ ）
- 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. （ ）
A:coolant
B:air
C:lubrication
D:gasoline
答案:coolant
A:friction
B:gas force
C:gravity
D:centrifugal force
A:water pump
B:thermostat
C:fuel cap
D:radiator
A:对 B:错
A:对 B:错
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