A _______ fuel oil to air ratio causes sooting and low burner efficiency:

Water tube boilers are used for high pressure steam applications:

The amount of the heat required to bring the water to its boiling temperature is its:

Low pressure steam contains ______ latent heat per pound compared to high pressure steam:

Hot water heating system produces heat less consistently than steam heating system

________ is a process of reduction of oil into small droplets

Air is drawn through the combustion chamber by an Induced Draft fan or blower to maintain a ______ pressure:

_______ steam trap uses a float device for measuring the condensate level in the trap and then operate a discharge valve for removing condensate:

Low-pressure boilers are limited to a maximum working pressure of _____ :

Economizers typically increase overall boiler efficiency by _____ :