Refrigerant recovery from a system using R-123 starts with _____ removal and is followed by ____ recovery.

As of ______, the sale of CFC and HCFC refrigerants is restricted to certified technicians

EPA regulations require that all comfort cooling appliances containing more than 50 lbs. of refrigerant be repaired when the annual leak rate exceeds ______.

Fewer refrigerant is contained in the oil at this ______ temperature

Refrigerant Recovery and/or Recycling equipment manufactured after _____, must be certified and labeled by an EPA approved equipment testing organization to meet EPA standards.

A chiller is a vapor compression system that directly cools the air in the building.

A recovery unit’s high pressure cut-out is set for _____ when evacuating the refrigerant from a low-pressure chiller

Water must be circulated through the tubes when evacuating refrigerant in order to prevent freezing the water

Most low-pressure recovery machines utilize a water-cooled condenser that is connected to the municipal water supply

Introducing liquid refrigerant into a deep vacuum will cause the refrigerant to ____

liquid receiver is located at the downstream of the ____:

Using recovery or recycling equipment manufactured or imported before Nov. 15, 1993  for Low Pressure appliances evacuation should be:

During evacuation of systems with large amounts of water, it may be necessary to _____ pressure by introducing nitrogen to counteract freezing

The typical design burst pressure for a rupture disc for protecting the low-pressure chillers against over-pressurization is:

Which of the following device will relieve overpressure and then reseal