A.help preheat the air for the furnaces
B.help preheat the feedwater
C.protect economizer from excessive heat
D.prevent excessive furnace heat losses
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A.the bilges
B.the periscope
C.the water level
D.the oil pressure
A.excess stresses will not be set up in the boiler
B.the decks will not be covered with soot
C.the soot will be swept toward the uptakes
D.there will not be a loss of steam pressure
A.bottom-blow valve
B.skin valve
C.feed-check valve
D.feed-stop valve
A.a system with a Hydraulic Power Supply (HPS) unit
B.a system with roller guides for exhaust valves
C.a system with an electronically controlled Alpha Lubricator
D.a system directly powered by electric motor
A.Lower fuel consumption
B.Better balanced cylinder power
C.A shorter overhaul period
D.Less smoke emission
最新試題
Under MARPOL Code the ship to which it applies has to carry （）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
The shipboard oil pollution emergency plan will be invalid after （）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
Cold weather starting of a diesel engine may be made easier by（）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
To proceed to the assistance of a ship in distress is（）