Burner ignition failure in an automatically fired auxiliary boiler would be caused by()
_____ his laziness, he was fired.
As for a oil-fired boiler too much air would indicated by ().
The furnace of an oil fired boiler should be () before the operating burner is lit.
The boiler is fired () the demand for steam exceeds that available from exhaust gas heating.
_____ his laziness, he was fired.
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 ().
Flame failure in an automatically fired auxiliary boiler can from a/an ()