Failure of the burner flame in an auxiliary boiler would probably be a result of（）

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

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

A.water in the fuel oil
B.excessive cycling
C.high fuel oil pressure
D.improper burner maintenance