單項選擇題

When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）

A.cold fuel oil
B.low fuel oil pressure
C.low atomizing steam pressure
D.water in the fuel oil

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單項選擇題

The amount of chloride content in the water of an auxiliary boiler can be reduced by（）

A.adding hydrazine
B.blowing down the boiler
C.adding phenolphthalein
D.adding a sulfite chloride scavenger

單項選擇題

The purpose of designing some waste heat boilers with sinuous fire tubes, is to（）

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