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?（）
单项选择题 Ignition failure in an automatically controlled auxiliary boiler could be caused by（）
单项选择题 Heavy soot accumulations in an auxiliary boiler could be caused by（）
