The lubricating oil cooler is circulated by sea water or low temperature fresh water, wh

A.radiator

B.oil filter

C.engine oil

A.Splash

B.Gravity

C.Pressure

D.Bypa

A.Low pressure of the lubricating oil

B.Low level of the lubricating oil

C.High temperature of the lubricating oil

D.High temperature of the cooling water

A.a spindle lubricator

B.an oil jet

C.internal splashing

D.drilled passages in the crankshaft

Stern tube and strut(支柱) bearings lined with hardwood or rubber composition materials are lubricated with______.

A.saltwater

B.graphite(石墨)

C.light lubricating oil

D.heavy lubricating oil

Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts？

A.Flash point improvers

B.Pour point improvers

C.Inhibitors

D.Foam suppressors(抑制物)

Lubricating oil should be changed on a heavy duty diesel engine when ______．

A.It gets dark in color

B.A sample rubbed between fingers feels thin

C.It has been in use for a specified interval

D.It no longer supports combustion

A．contaminating water

B．contaminated additives

C．contaminated fuel

D．contaminating impuritie

A.over-speed trip

B.audible/visual alarm

C.the ships/boats general alarm

D.reserve oil storage tank

A.all of the oil used by the engine through a filter

B.some of the oil used by the engine through a filter

C.some of the oil used by the engine through a centrifuge

D.all of the oil used by the engine through a centrifuge