单项选择题

Why the cooling water of the diesel engine should be treated? Because the（）

A.Cooling water is alkalescence
B.cooling water is acidity
C.cooling water has salinity
D.cooling water has impurity

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单项选择题

The cooling water of the diesel engine should be treated, because it has（）

A.alkale scence
B.acidity
C.salinity
D.impurity

单项选择题

When received the order "finished with engine" which of the following operations is wrong?（）

A.stop the LO pump, SW pump, FW pump
B.stop the priming FO transfer pump
C.engage the turning gear
D.open the scavenge air belts drain valve and cover the turbocharger silencer with the dustproof cover

单项选择题

When the diesel is stopped, which of the following items is wrong?（）

A.keep all systems in normally running
B.the main engine is stand-by
C.shut off the starting air bottle outlet valve
D.pay attention to the changes of the system parameters