The three classifications of refrigerants most technicians work with today are chlorofluorocarbons (CFCs), hydrochloroflurorocarbons (HCFCs), and hydrofluorocarbons (HFCs).
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Air pollution regulations are enacted at the federal level a…
Air pollution regulations are enacted at the federal level and/or at the state and local level.
The three classifications of refrigerants most technicians w…
The three classifications of refrigerants most technicians work with today are chlorofluorocarbons (CFCs), hydrochloroflurorocarbons (HCFCs), and hydrofluorocarbons (HFCs).
Steam from a boiler is directed by the main steam line throu…
Steam from a boiler is directed by the main steam line through the main steam stop valve and enters the steam header.
High surface tension is a boiler water condition in which th…
High surface tension is a boiler water condition in which the surface of the water is strengthened by a layer of impurities.
The closed end of a Bourdon tube is attached to the steam si…
The closed end of a Bourdon tube is attached to the steam side of a boiler.
A ___ test is a water treatment test using a reagent to dete…
A ___ test is a water treatment test using a reagent to determine the concentration of a specific dissolved substance.
Natural-circulation hot water heating systems are commonly u…
Natural-circulation hot water heating systems are commonly used in large contemporary buildings.
Natural-circulation hot water heating systems are commonly u…
Natural-circulation hot water heating systems are commonly used in large contemporary buildings.
Even in full open position, a ___ valve causes steam to chan…
Even in full open position, a ___ valve causes steam to change direction through the valve, resulting in a drop in steam pressure.