单项选择题
The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）
A.Low compression pressure and high exhaust temperature B.Low firing pressure and high exhaust temperature C.Low compression pressure and low exhaust temperature D.Low firing pressure and low exhaust temperature
单项选择题 Excessive valve lash in an auxiliary diesel engine will cause the valves to open（）
单项选择题 Pyrometers commonly found on diesel engine exhaust systems, consist of（）
单项选择题 Low compression in a diesel engine can be caused by （）
