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

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單項選擇題

The water in an auxiliary boiler should be chemically tested daily for alkalinity and（）

A.soap hardness
B.nitrog encontent
C.chloride content
D.dissolved CO₂

單項選擇題

Which of the following procedures decreases the total dissolved solids concentration in the water of an auxiliary boiler?（）

A.Hydrazine treatment of condensate
B.Frequent compounding
C.Chemical cleaning
D.Bottom blowing

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

你可能感興趣的試題

The water in an auxiliary boiler should be chemically tested daily for alkalinity and（）

Which of the following procedures decreases the total dissolved solids concentration in the water of an auxiliary boiler?（）