题目内容
（请给出正确答案）
The crankcase cover should never be allowed to open for investigation when _____.
A.the engine stops
B.the engine is running
C.you repair the engine
D.overhauling the engine
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更多“The crankcase cover should nev…”相关的问题
A.the cylinder cover
B.the bottom of bed-plate
C.the sump
D.the crankcase door
A．cylinder cover
B．cross-head shoes
C．guide-ways
D．scavenging boxe
A.lubricating oil
B.dry sump
C.circulated tank
D.wet sump
If a crankcase explosion occurs in a diesel engine, you should stop the engine and＿.
A.immediately open all crankcase relief ports
B.increase crankcase exhauster speed to draw cool air into the engine
C.allow the engine to cool naturally
D.increase crank case scavenge air to remove unburned gases
Crankcase explosions in propulsion diesel engines result from ____.
A.the splashing of lubrication oil by the crankshaft
B.the dilution of crankcase oil with particles of combustion
C.broken fuel lines spraying oil on the crankcase
D.the ignition of unburned fuel and air in the crankcase
Sludge may form in the crankcase of an air conditioning compressor as a result of ______.
A.bubbling refrigerant
B.overheating and oxidation
C.lowered operating temperatures
D.reducing the cloud or floc point
The blower type crankcase ventilation system ________.
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.prevents spark generation
B.removes combustible gases
C.determines the level of combustible gases
D.provides inert gas generation in crankcase
The crankcase of many diesel engines are kept under a slight vacuum by the _____.
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
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