题目内容

What percentage of engine heat is dissipated through the cooling, lubricating, and fuel systems?

A. Between 10% to 15%
Between 20% to 25%
C. Between 30% to 35%
D. Between 40% to 45%

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Coolant in a liquid-cooled system flows directly from the water pump to the ______.

A. bottom of the radiator
B. water jackets and passage
C. cylinder head
D. top of the radiator

As the crankshaft nears the end of its second complete revolution,the piston again approaches theposition.

A. BDC
B. TDC
C. BBDC
D. ATDC

What is the core of a car’s engine?

A. The cylinder
B. The spark plug
C. Windshield-washer fluid
D. Exhaust

Which of the following is one of the jobs of the differential?

A. To allow the wheels to rotate at exactly the same speed.
B. To maintain torque.
C. To aim the engine power at the wheels.

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