Boiler layup is required when a boiler is out of service between shifts.

___ weakens the metal and shortens the life of a boiler.

A therm is the quantity of gas required to produce 100,000 Btu.

A safety valve prevents backflow to a fuel tank from a fuel oil system.

A therm is the quantity of gas required to produce 100,000 Btu.

Procedures commonly performed and logged during a shift include water column and gauge glass blowdown, bottom blowdown, low water fuel cutoff testing, and flame scanner testing.

A tagout prevents the startup of equipment and serves as a warning to operating and service personnel.

Before dumping a boiler, the boiler heating surface should be ___.

The most common type of dynamic pump is a ___ pump.

The specific gravity of water is 2.0.