Saturated liquid ammonia at 70°F weighs how much?

The correct answer is based on the known density of saturated liquid ammonia at 70°F, which is indeed approximately 38.04 lbs/cu. ft. This value is derived from tables and charts that provide physical properties of refrigerants at various conditions. Saturated liquid ammonia has a specific weight that varies with temperature and pressure, and at 70°F, the density is a reliable measurement that refrigeration operators should be familiar with.

Understanding the properties of ammonia is essential for applications in refrigeration systems where it acts as a refrigerant. The density influences calculations around fluid flow, system capacity, and thermal dynamics within the refrigeration cycle. It is crucial for operators to grasp these concepts to effectively manage and troubleshoot refrigeration systems.

The other options reflect values that do not correspond to the density of saturated liquid ammonia at that specific temperature, reinforcing the importance of having precise references for refrigerant characteristics in operational settings.