Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.

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

A . of the diaphragm type B . of the centrifugal type C . of the positive displacement type D . independently driven by electric motor

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

A . overheated compressor bearings B . excess lube oil viscosity C . carbon deposits on the compressor piston rings D . wax crystals forming in the lubricant

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 . allow filtration of less viscous oil B . decrease the pressure drop across the filter C . improve overall filtration D . all of the above

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 . reduce load B . check your exhaust C . adjust cooling water temperature D . increase lube oil flow

A . viscosity is too low B . temperature is too low C . pump discharge pressure is higher than the systems pressure D . pump capacity is greater than the systems need

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 . close the tank filling valves quickly B . top off all tanks at the same time C . rill completely all tanks to less than 95% full D . reduce the loading rate when topping off

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

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

A . decrease the time required between cleanings B . removes all large and small foreign objects C . ensure a positive flow of oil at all times D . ensure that all lube oil has been treated twice

A . air filtration is inadequate B . engine coolant leaking into the lube oil C . fuel oil is leaking into the lube oil D . the piston rings are excessively wor

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