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
The cetane rating of diesel fuel is an indication of the ()
During the diesel engine running, the water level of F.W expansion tank should normally kept in the () level of glass tube.
The condensers located in various stages of a flash evaporator are cooled by()
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?()
()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
The treatment of the fuel oils involves storage, heating, filtering and()
To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()
() is not installed on the main switchboar.
Flame failure in an automatically fired auxiliary boiler can from a/an ()
Which of the following items don’t belong to dock repair works?()