All valves are opened during dry layup to prevent moisture from entering the boiler.

The American National Standards Institute (ANSI) is a national standards organization that helps identify industrial and public needs for national standards.

In a ___ system, the inlet temperature at each consecutive heating unit is lower than at the previous heating unit.

A(n) ___ is a container located between an evaporator and a compressor that catches any liquid refrigerant before it reaches the compressor and causes damage.

Not all boilers use modulating control.

The Fahrenheit scale uses 0°F as the freezing point of salt water and provides a larger number of increments between the freezing point of pure water (32°F) and boiling point of pure water (___°F) compared to the Celsius scale.

The Fahrenheit scale uses 0°F as the freezing point of salt water and provides a larger number of increments between the freezing point of pure water (32°F) and boiling point of pure water (___°F) compared to the Celsius scale.

___ the fuel oil is the process of using air to discharge residual fuel oil in a burner nozzle.

A ___ is a boiler fitting used to vent air from inside the boiler.

A suction accumulator is a device used to remove air and moisture from a refrigeration system.