單項選擇題The purpose of an oil mist detector in a main propulsion diesel engine is to warn of （）

A.excessive mist density in the crankcases
B.excessively high crankcase vacuum
C.excessively high bearing temperature
D.excessive carbon buildup in the lube oil


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1.單項選擇題Permitting a diesel engine fuel oil day tank to run dry can cause （）

A.overheated injection pumps
B.water condensation in the cylinders
C.fuel dilution of the lube oil
D.air in the fuel system

2.單項選擇題Water in the fuel can prevent the engine from starting, prevent it from developing full power, or （）

A.run at an irregular speed
B.create high lube oil temperature
C.cause the engine to over-speed
D.cause blue smoke in the exhaust

3.單項選擇題In a single acting, four-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs （）

A.once every crankshaft revolution
B.once every two crankshaft revolutions
C.once every piston stroke
D.twice every piston stroke

4.單項選擇題When a ship is involved in an oil pollution incident in China, the ship must report without delay to（）

A.China Maritime Administration
B.the company
C.the cargo owner
D.ship owner

5.單項選擇題Faulty operation of diesel engine fuel injection nozzles can be directly caused by （）.

A.water in the fuel oil supply
B.excessive fuel nozzle holder cooling
C.a distorted fuel spray pattern
D.leakage past the plunger into the oil drain