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
点击查看答案&解析
相关考题
-
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 -
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 -
单项选择题
The procedures recommended for auxiliary boilers having high salinity include （）.
A.treating with oxygen scavengers
B.securing the boiler and giving it a blowing down
C.increasing the pH
D.reducing the phosphate level
