单项选择题
A.increase B.decrease C.fluctuate D.remain constant
A dirty diesel engine oil filter element can best be de...
单项选择题A dirty diesel engine oil filter element can best be detected by （）.
A.visual inspection of the elements B.the pressure drop across the filter C.high lube oil sump temperature D.decrease in oil viscosity from the filter
In an auxiliary boiler steam and water system, the high...
单项选择题In an auxiliary boiler steam and water system, the highest pressure will be in the （）.
A.steam stop valve B.dry pipe C.feedwater system D.generating tubes
If the jacket water temperature of an operating diesel ...
单项选择题If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to （）.
A.an overfilled expansion tank B.excess chromate treatment of the jacket water C.a clogged raw water sea suction D.cavitation erosion of the heat exchanger tubes
