单选题A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）.A waterB babbittC iron or steelD acids

If the jacket water temperature rises rapidly above normal in a diesel engine, you should first

A.place standby cooler in operation

B.reduce engine load

C.check thermostatic valve

D.clean sea water strainer

Lubrication for the main reduction gears used with diesel engines is usually supplied by

A.oil from the main engine sump

B.an independent lube oil system

C.the stern bearing head tank

D.the stem bearing sump tank

When transmitted by a reduction gear, diesel engine speed is reduced and the torque available for work

A.remains the same

B.is reduced

C.is increased

D.is eliminated

Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?

A.Baffle plates that have been bent during prior removal

B.Leaks m the cooler tube nest

C.Operating the engine while maintaining a high sea water outlet temperature

D.A punctured sea water strainer supplying cooling water to the heat exchanger

A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of

A.water

B.babbitt

C.iron or steel

D.acids

In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .

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

_____ the engines, the diesel engine is ____ used engine on board

A.Between / more commonly

B.Among / the most commonly

C.Between / not more commonly

D.Among / not the most commonly

A Kort nozzle is a(n) ______.

A.hollow tube surrounding the propeller used to improve thrust

B.nozzle attached to a firefighting hose

C.intake valve on a diesel engine

D.piston cylinder on a diesel engine