__ book to the low-side fitting of the air conditioning system to determine whether the refrigerant is pure or it is contaminated with another refrigerant or air. a. Reclaim tecycle machines b. Refrigerant identifiers c. Vacuum pumps d. Anemometers

## Step 1<br />The problem is asking us to identify the correct tool used to determine the purityant in an air conditioning system. The options provided are: a. Reclaim recycle machines, b. Refrigerant identifiers, c. Vacuum pumps, and d. Anemometers.<br /><br />## Step 2<br />Reclaim recycle machines are used to recover refrigerants from air conditioning systems and other equipment. They are not used to determine the purity of the refrigerant.<br /><br />## Step 3<br />Refrigerant identifiers are used to detect the presence of refrigerants in the air. They can also be used to determine the type of refrigerant present. This makes them the correct tool for the task described in the problem.<br /><br />## Step 4<br />Vacuum pumps are used to remove air and moisture from the refrigeration system. They are not used to determine the purity of the refrigerant.<br /><br />## Step 5<br />Anemometers are used to measure wind speed and direction. They are not related to refrigerants or air conditioning systems.