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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Lube oil cannot be efficiently filtered if its （）.
The function of diesel engine piston compression rings is to （）.
A diesel engine piston ring face is in direct contact with the （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
Maximum horsepower of a diesel engine is attained （）.
In using reduction gears to obtain efficient propeller speeds, （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.