A.caustic embrittlement of the boiler metal
B.acidic corrosion of the boiler metal
C.hard scale deposits on the boiler tubes
D.etching of the heat exchange surfaces
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A.assist in a quick cutoff of fuel injection
B.allow oil backflow from the injector to the helix
C.reduce fuel oil pressure between injection strokes
D.meter the quantity of fuel delivered
A.10
B.7
C.4
D.1
A.open air-box drains
B.loss of cooling water to the diffuser
C.gradual fouling of the air filters
D.improperly timed exhaust valves
A.concentrations of calcium sulfate in the boiler water
B.fuel oil in the feed water
C.improper treatment of the feed water with calcium sulfate
D.excessive feed water alkalinity
A.High oxygen concentration
B.Low pH
C.Proper alkalinity
D.All of the above
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Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
Combustion knock occurring in a diesel engine can be caused by （）.
Lube oil cannot be efficiently filtered if its （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
A diesel engine piston ring face is in direct contact with the （）.
Maximum horsepower of a diesel engine is attained （）.
In a simple mechanical governor, the （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）