单项选择题
A.back B.side C.gap D.bottom
In a four-cycle diesel engine piston blow-by can result...
单项选择题In a four-cycle diesel engine piston blow-by can result in increased（）
A.crankcase pressure B.compression pressure C.scavenge pressure D.exhaust manifold pressure
The most effective method in removing water from diesel...
单项选择题The most effective method in removing water from diesel fuel oil is by（）
A.centrifuging the fuel B.using it in the engine C.heating the fuel tanks D.starting the fuel
On board supply vessels, a centrifuge is normally used ...
单项选择题On board supply vessels, a centrifuge is normally used to purify（）
A.cooling water B.fuel oil C.sea water D.diesel intake air
