单项选择题
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
单项选择题 The water in an auxiliary boiler should be chemically tested daily for alkalinity and（）
单项选择题 Which of the following procedures decreases the total dissolved solids concentration in the water of an auxiliary boiler?（）
单项选择题 Failure of the burner flame in an auxiliary boiler would probably be a result of（）