单项选择题
A.low coolant temperature
B.insufficient fuel
C.high ambient temperature
D.carbon buildup on the injector tips
单项选择题 Crankcase explosions in propulsion diesel result from（）
单项选择题 Diesel engine automated control systems may utilize sensing devices of dual function, with sensing ranges providing both alarm and engine shut down capability.Which of the key points would only require an alarm sensor?（）
单项选择题 What is the function of an engine’s stationary parts?（）