The purpose of designing some waste heat boilers with sinuous fire tubes, is to（）<br>A:increase exhaust gas velocity through the boiler<br>B:reduce accumulations of carbon deposits on the heat transfer surfaces<br>C:eliminate exhaust gas pulsations and noise<br>D:increase the rate of heat transfer to the waterside

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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