A、scavenging action of the piston
B、piston type vacuum pump taking suction off a differential manometer
C、gland exhausting manometer
D、crankcase exhaust fan
更多“The crankcase of many diesel engines are kept under a slight vacuum by the （）.”相关的问题
A、A.the splashing of lubrication oil by the crankshaft B、B.the dilution of crankcase oil with particles of combustion C、C.broken fuel lines spraying oil on the crankcase D、D.the ignition of unburned fuel and air in the crankcase
A、a shortage of refrigerant in the system B、air in the system C、an accumulation of liquid refrigerant in the crankcase D、a shortage of oil in the crankcase
A、free entry of air to the crankcase B、water entering the crankcase while engine wash-downs are being performed C、excessive oil leakage during periods of increased blow-by D、sub-cooling internal components
A、removes combustible gases in the crankcase B、prevents the formation of combustible gases in the crankcase C、cools lubricating oil D、improves cold weather starting
A、Open the crankcase immediately to check for damage B、Apply fire fighting water through the crankcase breather C、Allow the engine to cool before opening the crankcase D、Assume that there is no damage to the crankshaft
A、supply clean air to the measuring compartment of the units for more accuracy B、generaate the pressure required for the extraction of the oil mist from the C、generate the pressure required for the extraction of the oil mist from the crankcase D、supply clean air to the measuring track of the units for more accuracy
A、man.s relationship with nature transcends the idea of usefulness B、nature is useful to man C、nature is independent of man and has nothing to do with man D、nature can only be used by man
A、A.One man report the fire, and the other two men fight the fire B、B.One man report the fire, one man fight the fire, and one man evacuate and secure the area C、C.One man report the fire, one man fight the fire, and one man act as a safety observer D、D.All three men fight the fire and report it immediately after it is extinguished
客服
TOP
查看正确答案
