What is the density of vapor at 42 degrees?

The density of vapor at a given temperature is a crucial aspect in the field of refrigeration, as it affects both the efficiency of the system and the calculations for refrigerant flow. In this case, the correct value of 0.0254 ft³/lb is a precise measurement that reflects the characteristics of vapor at 42 degrees.

This value is important because it provides operators with the necessary information to design and maintain systems optimally. Understanding density allows operators to accurately calculate the volume of refrigerant needed for various applications, which in turn impacts the overall performance and safety of the refrigeration system.

In practice, density calculations are essential for determining the load requirements and making sure the system is adequately charged. If the value were slightly off, it could lead to inefficiencies or overloading in the system, which emphasizes the relevance of accurate data in operations.

The other densities provided in the choices would likely lead to incorrect calculations and misjudgments in system design and operation, illustrating the importance of selecting the correct density for effective refrigeration management.