A.10
B.7
C.4
D.1
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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
A.525 RPM
B.775 RPM
C.1550 RPM
D.1800 RPM
A.low firing pressure and low exhaust temperatures
B.low firing pressure and normal exhaust temperatures
C.high firing pressure and low exhaust temperatures
D.high firing pressure and high exhaust temperatures
最新試題
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
In using reduction gears to obtain efficient propeller speeds, （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
The main purpose of the piston oil scraper rings is to （）.
Proper filtering and straining of fuel oil is important because the （）.
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 （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.