单项选择题
A.cutting out individual injectors and noting engine performance B.checking lube oil temperature C.checking cam position D.using a timing light
What harmful condition can result if a diesel engine is...
单项选择题What harmful condition can result if a diesel engine is operated at very light loads for long periods of time?（）
A.increased carbon buildup B.burning of intake valves C.excessive firing pressures D.increased fuel consumption
Turbocharged four-stroke/cycle diesel engines utilize v...
单项选择题Turbocharged four-stroke/cycle diesel engines utilize valve overlap for（）.
A.improving cylinder scavenging B.preheating the combustion chamber C.reducing air charge density D.preventing valve wear
Operating a propulsion diesel engine at less than 30% o...
单项选择题Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in （）.
A.decreased fuel consumption per brake horsepower B.more complete cylinder scavenging C.extended valve life D.carbon formation on combustion chamber surfaces
