ASHRAE Standard 15 requires that the rooms with refrigerant systems must be equipped with sensors _______.

Of the following conditions, when should the oil sample be taken from the refrigeration system?

Hermetic compressors shouldn’t be energized under vacuum because ________.

Of the following conditions, when should the reciprocating compressor not be energized?

What is a measuring unit of deep vacuum in a system?

The leak check should be done on heat pump that uses R-410A with _______

The compressor should be isolated before changing the compressor on a system containing R-410A. Then evacuate the compressor section to _______ and hold. If the system pressure does not rise, remove the compressor.

The primary water source most often used for cooling the condenser of a water-cooled recovery unit is _____.

System-dependent recovery equipment CANNOT be used when _____.

The component directly following the evaporator of the refrigeration system is the ______________

What is the non-operating pressure inside a R-410 refrigerant system at room temperature 72 degrees F?

The R-12 refrigeration system which uses water cooled condenser should be charged first with vapor pressure of at least _______ before switching to liquid charging.