A.completely drain the boiler in an emergency
B.prevent sludge from forming in the drum
C.remove floating impurities from the boiler water surface
D.remove settled solids from the water drum
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A.defective solenoid valve
B.dirty fuel nozzle
C.grounded high tension lead
D.faulty ignition cable connector
A.excessive purging before lighting off
B.insufficient trail for ignition period
C.a faulty transformer in the ignition circuit
D.insufficient purging before lighting off
A.prevent engine back pressure at heavy loads
B.increase total engine efficiency at low loads
C.prevent boiler corrosion at low engine loads
D.improve engine fuel consumption at any load
A.steam demand is high
B.salinity is high
C.safety valve simmers
D.burner flame is extinguished
A.incorrect electrode setting
B.incorrect nozzle position
C.clogged fuel nozzle
D.broken high tension lead
最新試題
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
The main purpose of port State control is not to（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Cold weather starting of a diesel engine may be made easier by（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
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.
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）