A.60 to75
B.80 to 95
C.100 to 115
D.120 to 135
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A.heat conduction into the injected fuel oil
B.heat conduction into the water jacket wall
C.water circulation through passages in the holder
D.fuel oil circulation through passages in the holder
A.slightly acidic condition
B.slightly alkaline condition
C.overtreatment of water
D.neutral condition of water
A.Combustion gases flow through the tubes
B.Flames impinge on the tubes
C.Combustion occurs in the tubes
D.Water flows through the tubes
A.slight acidity
B.slight alkalinity
C.excessive alkalinity
D.excessive acidity
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
A.increase the fuel oil temperature
B.decrease the fuel oil temperature
C.decrease the fuel oil supply pressure
D.increase the air supply
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An automated diesel engine should normally shut down due to （）
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
Maximum horsepower of a diesel engine is attained （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
The function of diesel engine piston compression rings is to （）.
A thrust bearing is used with a propulsion diesel engine to （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.