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The safety valve on a low pressure boiler is designed to open when pressure in the boiler exceeds the ___.

Class D fires are fires that burn wood, paper, textiles, and other dry materials containing carbon.

Class D fires are fires that burn wood, paper, textiles, and other dry materials containing carbon.

A(n) ___ is a person who locks out or tags out machines or equipment in order to perform servicing or maintenance on that machine or equipment.

Fuel oil can be classified as distillate fuel oil or heavy fuel oil.

Fuel oil can be classified as distillate fuel oil or heavy fuel oil.

Thermal efficiency can be as high as ___% on some boilers.

Latent heat is heat identified by a change of state and no temperature change of the substance.

Latent heat is heat identified by a change of state and no temperature change of the substance.

A surge tank generally includes an automatic water makeup system with a float chamber that is located at the minimum water level.