A.Through the crankcase exhauster
B.As water vapor contained in blow-by
C.Demulsifying lube oil passing through the main bearings
D.Condensation from vapor formed in the expansion tank
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A.sediment contamination
B.fuel filter clogging
C.moisture formation
D.inadequate transfer pump suction head
A.a cracked cylinder head
B.a leaky cylinder head gasket
C.a cracked cylinder liner
D.any of the above
A.Ensure proper cylinder lube oil flow
B.Open all air space drain cocks
C.Open all indicator valves
D.all of the above
A.allow impurities to settle out of the fuel
B.allow air to escape from the fuel
C.make fuel available for immediate use
D.all of the above
A.cam rollers on the camshaft
B.spring force
C.air pressure on top of the valve differential piston
D.air pressure on the bottom of the valve differential piston
最新試題
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Flame failure in an automatically fired auxiliary boiler can from a/an （）
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Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
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