Excessive vibration of an automatically fired auxiliary boiler can be caused by ()
When there is a flame failure in an automatically fired auxiliary boiler, the ().
Too much air in the furnace of an oil-fired boiler would be indicated by ().
Too much air in the furnace of an oil-fired boiler would be indicated by ().
A firebox explosion in an automatically fired auxiliary boiler may be the result of ()
Burner ignition failure in an automatically fired auxiliary boiler would be caused by()
Which of the following actions may cause a trigger to be fired?()
The furnace of an oil fired boiler should be () before the operating burner is lit.
Prior to lighting off a cold automatically fired auxiliary boiler, yon should ().
As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: () (1) secure oil to fires (2) increase feed pump pressure