单项选择题
A.soap hardness B.nitrog encontent C.chloride content D.dissolved CO2
Which of the following procedures decreases the total d...
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
Failure of the burner flame in an auxiliary boiler woul...
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
Which action should be taken when an auxiliary boiler i...
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
