单项选择题
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
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相关考题
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单项选择题
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 -
单项选择题
Failure of the burner flame in an auxiliary boiler would probably be a result of（）
A.water in the fuel oil
B.broken high tension leads
C.incorrect electrode setting
D.full fuel pressure at the nozzle -
单项选择题
Which action should be taken when an auxiliary boiler in is operation?（）
A.Clean all electrical connections
B.Lift the relief valves by hand
C.Inspect and clean all solenoid valves
D.Inspect for oil and water leaks
