___ fire is burning the maximum amount of fuel in a given unit of time.

___ fire is burning the maximum amount of fuel in a given unit of time.

There are four main causes of natural circulation in a boiler.

Equipment in chemical feed systems varies but usually includes a mixing tank, a pump, control valves, piping, and a control mechanism.

The best time to blow down a boiler to remove sludge and sediment is when the boiler is under a ___.

In a feedwater system, the feedwater tank is a large condensate receiver used to collect condensate before it is directed back to the boiler or deaerator.

A ___ is a rotary compressor that has rotating impellers to pressurize refrigerant.

A ___ is a rotary compressor that has rotating impellers to pressurize refrigerant.

A natural-circulation hot water heating system uses circulating pumps to transport water in the system.

Nonadhering sludge is best removed when a boiler is ___.