单项选择题
A.not be changed B.be changed C.should not be changed D.should be changed
It is abnormal that when the engine is being turned by ...
单项选择题It is abnormal that when the engine is being turned by the turning gear or by hand, （）.
A.water discharges from the indicator cocks B.no water is leaking into crankcase C.no water in the scavenge belt D.the rpm is lower than the speed of Dead Slow Ahead
Increasing the temperature of a fuel will reduce its （）...
单项选择题Increasing the temperature of a fuel will reduce its （）.
A.viscosity B.pressure C.resistance D.setting point
Increasing differential pressure of an oil filter indic...
单项选择题Increasing differential pressure of an oil filter indicates that （）
A.it is dirty B.it is leaky C.it has been renewed D.all the above
