單項(xiàng)選擇題

An electric heater built into some smaller diesel engines is used to （）.

A.raise lube oil viscosity for easier starting in cold weather
B.increase air inlet temperature
C.increase compression ratio
D.increase jacket water temperature for easier starting in cold weather

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單項(xiàng)選擇題

A SECONDARY function of a waste heat boiler is to （）.

A.reduce engine exhaust noise
B.reduce engine back pressure
C.increase engine cycle efficiency
D.increase turbocharger efficiency

單項(xiàng)選擇題

Fuel injection systems meter fuel, atomize fuel, and （）.

A.create turbulence in the combustion chamber
B.aid in completing cylinder scavenging
C.inject fuel at the proper time
D.minimize fuel penetration into the cylinder

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An electric heater built into some smaller diesel engines is used to （）.

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A SECONDARY function of a waste heat boiler is to （）.

Fuel injection systems meter fuel, atomize fuel, and （）.