A.slight acidity
B.slight alkalinity
C.excessive alkalinity
D.excessive acidity
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A.cold corrosion of the nozzles
B.fuel viscosity for better atomization
C.carbon accumulation on the nozzles
D.fuel detonation in the cylinders
A.the size of the holes in the fuel nozzle
B.timing of the pump
C.supply pressure to the pump
D.shape of the combustion chamber
A.fuel injectors
B.exhaust valves
C.intake valves
D.all of the above
A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （）
(1) scavenging air is cooling the exhaust gases
(2) exhaust cycle time is longer
A.(1) only
B.(2) only
C.both (1) and (2)
D.neither (1) nor (2)
A.acidity has increased
B.viscosity has decreased
C.demulsibility has improved
D.foaming is guaranteed to occur
最新試題
A thrust bearing is used with a propulsion diesel engine to （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
Maximum horsepower of a diesel engine is attained （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
Proper filtering and straining of fuel oil is important because the （）.
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
Combustion knock occurring in a diesel engine can be caused by （）.