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A ___ tank is a hot water system tank used to absorb changes in water pressure in a forced-circulation hot water heating system.

The types of mechanical draft are forced, induced, and a combination of forced and induced.

A ___ tank is a hot water system tank used to absorb changes in water pressure in a forced-circulation hot water heating system.

A(n) ___ is a common type of heat exchanger used to heat the air in a building space.

Rotary cup burners atomize fuel oil using a spinning cup and high-velocity air.

Rotary cup burners atomize fuel oil using a spinning cup and high-velocity air.

Water added to a boiler with a low water level condition could cause a boiler explosion.

Cold makeup water reduces overall boiler efficiency because energy is required to ___ the water.

Air flow in a natural draft system is controlled as necessary through the ___.

Low-water cutoffs must be checked at least weekly or when local ordinances require.