Question

When charging, the best way to determine the quantity of refrigerant in the system is to

(A) open the petcock on the liquid receiver.
(B) weigh the cylinder charge of the refrigerant.
(C) feel the temperature charge of the receiver shell.
(D) put a gas meter on the liquid line.

Answer 1

To accurately determine the refrigerant amount in a refrigeration system, the cylinder containing the refrigerant should be weighed. This is the most precise method compared to alternatives such as temperature feeling or pressure measurement.

Step-by-step explanation:

When charging a refrigeration system, the best way to determine the quantity of refrigerant in the system is to weigh the cylinder charge of the refrigerant. This method allows for a precise measurement of the refrigerant added or removed from the system. Using other methods, such as feeling the temperature of the receiver shell or putting a gas meter on the liquid line, can introduce inaccuracies due to various factors like ambient temperature or system specifics that can affect the pressure-temperature relationship.