單項選擇題“Before disconnecting the oil pipe, would you flush the oil retained in the pipe?” asked the oil barge owner （）

A．by using of fresh water
B．with compressed air
C．by using of sea water
D．with chemical compound


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.

A.two crankshaft revolutions in a two-stroke/cycle engine
B.two power strokes in a two-stroke/cycle engine
C.one power stroke in a two-stroke/cycle engine
D.two piston strokes in a two-stroke/cycle engine

2.單項選擇題Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.

A.increasing the volume of intake air
B.shutting off the fuel supply
C.increasing the engine back pressure
D.over-speeding the engine

3.單項選擇題The highest pressure in a diesel engine cylinder normally occurs （）.

A.at TDC
B.before TDC
C.after TDC
D.during air starting

4.單項選擇題When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.

A.filter to remove the fuel oil
B.use the settler to remove the fuel oil
C.remove the fuel oil by centrifuging
D.drain and then renew the lube oil supply

5.單項選擇題When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）

A.During operation at low speed
B.During operation at rated speed, but low power output
C.During acceleration
D.All of the above

6.單項選擇題What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）

A.Spark plug
B.Heat of compression
C.Carburetor
D.Glow ping

7.單項選擇題To determine if the lube oil filter elements need changing, （）.

A.open the filter and inspect the elements
B.check the lube oil pump discharge pressure
C.check the lube oil header pressure
D.check the pressure drop across the filter

8.單項選擇題Proper filtering and straining of fuel oil is important because the （）.

A.fuel oil pump will over-speed if dirt is not removed
B.fuel oil transfer pumps cannot tolerate small amounts of dirt in the oil
C.fuel injectors may be damaged by foreign particles in the fuel oil
D.dirty fuel will clog the intake air filter

9.單項選擇題In using reduction gears to obtain efficient propeller speeds, （）.

A.they must be located at the after end of the engine
B.they can only be used with one engine at a time
C.they eliminate the need for controllable pitch propellers
D.they are connected to the engine with a flexible coupling

10.單項選擇題Diesel engine control can be obtained by the bridge （）.

A.at any time
B.only after the engine room control station is switched to “bridge control”
C.whenever the secondary station is switched to "bridge control"
D.with the approval of the chief engineer only