A.clean the flame scanner photocell window
B.Inspect and clean all solenoid valves
C.lift the safety valves by hand
D.Inspect for oil or water leaks
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A.cold fuel oil
B.low fuel oil pressure
C.low atomizing steam pressure
D.water in the fuel oil
A.adding hydrazine
B.blowing down the boiler
C.adding phenolphthalein
D.adding a sulfite chloride scavenger
A.increase exhaust gas velocity through the boiler
B.reduce accumulations of carbon deposits on the heat transfer surfaces
C.eliminate exhaust gas pulsations and noise
D.increase the rate of heat transfer to the waterside
A.soap hardness
B.nitrog encontent
C.chloride content
D.dissolved CO2
A.Hydrazine treatment of condensate
B.Frequent compounding
C.Chemical cleaning
D.Bottom blowing
最新試題
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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 ISPS Code consists of a mandatory section-Part A, which shows（）
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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.
Flame failure in an automatically fired auxiliary boiler can from a/an （）