A．has run continuously for a long period
B．suction pressure is below normal
C．oil level is below normal
D．starts after a long idle period
[单选题]A diesel engines crankcase oil level is found to be too high√ You should suspect that （）.A . the engine was over filledB . there might be a fuel leakC . there might be a water leakD . all of the above
[单选题]Before pumping up the crankcase oil,（） should be worked by hand to minimize corrosive action on the liners.A . the indicatorsB . the starting valvesC . the cylinder lubricatorsD . the turning gear
[填空题] LOW OIL LEVEL COMPR CRANKCASE LSLL-731表示（）。
If a used lube oil analysis indicates an excessive chromate content, this means
[单选题]The lube oil to lubricate the surfaces of the cylinder liners is spread over by the （）.A . sliding piston ringsB . engines camshaftC . small pumpsD . forced feed system
[单选题]C．rankcase explosions in propulsion diesel engines result fromA．the splashing of lubrication oil by the crankshaftB．the dilution of crankcase oil with particles of combustionC．broken fuel lines spraying oil on the crankcaseD．the ignition of unburned
[单选题]C．rankcase explosions in propulsion diesel engines result from ____.A．the splashing of lubrication oil by the crankshaftB．the dilution of crankcase oil with particles of combustionC．broken fuel lines spraying oil on the crankcaseD．the ignition of unb
[单选题]The crankcase of many diesel engines are kept under a slight vacuum by the （）.A . scavenging action of the pistonB . piston type vacuum pump taking suction off a differential manometerC . gland exhausting manometerD . crankcase exhaust fa
[单选题]Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）A . free entry of air to the crankcaseB . water entering the crankcase while engine wash-downs are being performedC . excessive oil lea
[单选题]The crankcase can not be opened （）the parts have been cooled down.A . ifB . asC . unlessD . whe