单项选择题
Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）
A.Impurities
B.Lube oil
C.Gasoline
D.Diesel fuel
点击查看答案&解析
相关考题
-
单项选择题
The most common contaminate of governor hydraulic fluid is （）.
A.moisture
B.dirt
C.acid
D.air -
单项选择题
The purpose of the safety relief valves installed on an auxiliary boiler is to （）.
A.relieve excess fuel oil pressure during the “off” fire cycle
B.admit water to the dry pipe
C.throttle the forced draft fan output for proper combustion
D.reduce excess steam pressure in the boiler -
单项选择题
The pH value of water in a diesel engine closed cooling water system should be maintained between （）.
A.60 to75
B.80 to 95
C.100 to 115
D.120 to 135
