單項選擇題Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to （）

A.burn excessive amounts of lube oil
B.overheat without smoking
C.operate with reduce power or stop
D.run away without load


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1.單項選擇題The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）

A.expansion of the combustion gases
B.exhaust and intake valves just closing
C.maximum compression is just being attained
D.fuel injection occurring at that point and combustion begins

2.單項選擇題If a diesel engine runs out of fuel, you can expect trouble from （）

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

3.單項選擇題In a flash type evaporator, the brine overboard pump is vented directly to the（）

A.saltwater heater shell
B.the condensation of the saltwater feed
C.air ejectors, eductors, or a separate vacuum pump
D.condensation of the distillate

4.單項選擇題In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）

A.Condenser circulating water pump
B.Feed-water heater drain pump
C.Distillate pump
D.Air ejector condenser drain pump

5.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