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單項(xiàng)選擇題

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

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

Ignition failure in an automatically controlled auxiliary boiler could be caused by（）

A.carbon deposits on the flame scanner
B.high fuel oil temperature
C.low fuel oil viscosity
D.high steam pressure