A.remove suspended and precipitated solids from the boiler water
B.completely drain the boiler in an emergency situation
C.prevent hardened scale deposits in the water drum
D.remove floating impurities from the oily water surface
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A.around the engine
B.around the cooler
C.to the expansion tank
D.overboard
A.seawater contamination
B.frequent surface blows
C.dissolved oxygen deaeration
D.frequent bottom blows
A.total dissolved solids
B.salt contamination
C.water hardness
D.chlorine contamination
A.reduce mean effective pressure
B.decrease average compression pressure
C.decrease air charge density
D.increase power output
A.air or water in the furnace
B.combustion pulses
C.fuel oil pump failure
D.flame failure
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Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
The main purpose of the piston oil scraper rings is to （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
The function of diesel engine piston compression rings is to （）.
Diesel engine control can be obtained by the bridge （）.
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
Proper filtering and straining of fuel oil is important because the （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.