Lube oil cannot be efficiently filtered if its （）.

A、using a slightly dirty air filter B、using oil having an excessive viscosity C、intercooler or after-cooler leaks D、carrying the oil level higher than normal

A . Clogged oil pump suction screens B . Increased oil operating temperatures C . Sticking piston rings D . All of the above

A . Viscosity is decreased B . Octane number is altered C . Pump speed is decreased D . Blower’s speed is decreased

A . a dirty lube oil strainer B . internal water leaks C . an oil suction line restriction D . excessive wears of the cooling water pum

A . an increased flash point B . higher lube oil pressures C . an increased viscosity D . lower lube oil pressure

A . Ⅰ only B . Ⅱ only C . either Ⅰ or Ⅱ D . neither Ⅰ or Ⅱ

A . pitting B . sludge C . hard varnish D . all of the above

A . when B . how C . where D . whether

A . under high pressure B . under low pressure C . heated to reduce viscosity D . cooled to increase viscosity

A . changed B . centrifuged C . filtered D . settled

A . the water produced during combustion B . the sulfur in the fuel C . unburned fuel oil D . all of the above

A . high oil pressure B . excessive bearing end play C . plugged oil control rings D . engine overload

A . discharged to into special area B . discharged into national waters C . discharged into the designated zone D . retained on board or discharged to reception facilitie

A . water contamination B . mixing oils of two widely different viscosities C . overheating D . aeratio

A . piston rings B . valve guides C . valve seals D . all of the above

A . so as to never be integral lube B . with a sloped bottom C . only of nonferrous, noncorrosive metals D . with drain/return lines terminating just above or at the designed normal level

A . contaminated B . emulsified C . deteriorated D . oxidated

A . Camshaft beatings B . Main bearings C . Piston crowns D . Cylinder wall

A . loss of additives from the lube oil B . carbon deposits in the lube oil C . excessive centrifuging D . excessive fuel dilutio

A . determine the need for filter cleaning B . measure any change in oil viscosity C . prevent damage to the filter D . determine the need for batch filtratio

A . excessively high oil temperatures B . water or moisture contamination C . fuel dilution D . life its cylinder relief vale

A . Leaking fuel injectors B . Lower than normal compression C . Delayed fuel injection D . All of the above are correct

A . drained into the vessels bilges B . reclaimed for other uses C . held in a slop tank D . purified and then reused

A.Water discharging from the water outlet of the lube oil purifier B.Fuel oil discharging from the water outlet of the lube oil purifier C.Lube oil discharging from the water outlet of the lube oil purifier D.A change in the lube oil viscosity