Rotary cup burners can burn only No. 2 fuel oil.

Four common types of ___ include the thermostatic, float thermostatic, inverted bucket, and thermodynamic.

If there is an overpressure condition in a boiler, then the water level controls have failed.

___ is the rapid opening and closing of a safety valve.

A ___ is a pipe fitting with removable plugs that allows for cleaning and inspection of piping.

If there is an overpressure condition in a boiler, then the water level controls have failed.

To correct a high water condition, a ___ is performed to bring the water level to the NOWL.

When a boiler that has been producing steam is taken off-line, steam in the boiler cools and condenses, creating a ___.

Water that contains large quantities of dissolved minerals is called ___.

A boiler’s ___ is the highest pressure in pounds per square inch (psi) at which it can be safely operated.