A、oxygen in the water
B、poor boiler design
C、density too high
D、excessive steam demand
更多“Foaming in the steam drum may be caused by （） in a boiler.”相关的问题
A、double bottom fuel oil tank temperature B、heater supply steam flow C、pressure of the fuel supplied to the burners D、attemperator steam flow in the heater discharge circuit
A、A.double bottom fuel oil tank temperature B、B.heater supply steam flow C、C.pressure of the fuel supplied to the burners D、D.attemperator steam flow in the heater discharge circuit
A、A.rise when the steam pressure is increased B、B.remain constant as long as the feed pump operates C、C.fall when the steam pressure is decreased D、D.vary as the steam demand changes
A、A.There is apparent condensate in piping B、B.The steam is not discovered after admitting steam C、C.The condensate should be fully loaded in the piping as admitting steam D、D.The condensate should be fully drained from the piping while admitting steam
A、ensure feed water flow into the boiler B、keep the steam drum pressure high C、prevent water hammer in the feed line D、help the feed water flash to steam
A、cause a loss of the liquid seal B、create a vapor lock in the liquid receiver C、collect in the condenser D、cause foaming of the oil in the crankcase
A、main steam stop valve B、auxiliary steam stop valve C、feed check or control valve D、blow down valve
A、overheated compressor bearings B、excess lube oil viscosity C、carbon deposits on the compressor piston rings D、wax crystals forming in the lubricant
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