单项选择题

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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单项选择题

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

单项选择题

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

单项选择题

Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.

A.exhaust gas temperature system
B.exhaust load system
C.constant or pulse pressure system
D.constant volume system