单项选择题
A.sulfite or hydrazine B.sulfite or hygroscopic sulfite C.bromide or hydrazine D.bromide or hygroscopic sulfite
Operating a diesel engine for prolonged periods, with a...
单项选择题Operating a diesel engine for prolonged periods, with a closed freshwater cooling system, at temperatures lower than the normal design temperature can cause （）.
A.the formation of sulfuric acid B.a decrease in lube oil viscosity C.a decrease in cooling water pH D.a thermostat failure
Improper maintenance of the fuel oil burners in an auto...
单项选择题Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）
A.increased fuel consumption B.increased feed water consumption C.fuel pump failure D.combustion control system failure
Which of the following conditions may need to be reduce...
单项选择题Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）
A.Injection pressures B.Control air supply pressure C.Cooling water flow through after-coolers D.Lube oil temperature
