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
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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)
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The minimum speed an engine must attain before ignition can occur depends upon （）.
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
The ability of the governor to prevent fluctuations in engine speed is termed （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
To determine if the lube oil filter elements need changing, （）.
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
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 （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
White smoke exhausting from an operating diesel engine may indicate （）.
In using reduction gears to obtain efficient propeller speeds, （）.