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?（）
A.Lube oil pressure and temperature B.jacket water pressure and temperature C.Engine over-speed D.Lube oil sump level
单项选择题 What is the function of an engine’s stationary parts?（）
单项选择题 An overcorrecting and unstable engine governor operation is known as（）.
单项选择题 Coolant can be lost from a diesel engine jacket cooling waster system by leakage from（）
