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
单项选择题 A SECONDARY function of a waste heat boiler is to （）.
单项选择题 Fuel injection systems meter fuel, atomize fuel, and （）.
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 （）.
