HVAC: Critical Process Air System Trivia Quiz

Explanation
The correct answer is alkyl-benzene because it is a commonly used synthetic lubricant that is compatible with HCFC (hydrochlorofluorocarbon) based ternary blends. Alkyl-benzene lubricants have good thermal stability, chemical resistance, and lubricating properties, making them suitable for use in various applications. They also have low solubility in refrigerants, which helps prevent oil carryover and maintain system performance. Additionally, alkyl-benzene lubricants are environmentally friendly and have a low impact on ozone depletion and global warming potential.

Explanation
Equipment manufactured before November 15, 1993 must be capable of removing 80% of refrigerant, and also 90% of the refrigerant if the compressor is operating, 80% if the compressor is not operating.

Explanation
Esters can be mixed with other oils.

Explanation
Refrigerant, recovery, and/or recycling equipment manufactured after November 15, 1993, must be certified and labeled by EPA certified testing organizations.

Explanation
On July 1, 1992, it became unlawful to intentionally release class 1 and class 2 refrigerants into the atmosphere.

Explanation
The correct answer is July 1, 1992. This date marks the implementation of regulations to limit the emission of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). These substances are known to deplete the ozone layer and contribute to global warming. By setting a maximum limit on the release of CFCs and HCFCs, the international community aimed to protect the ozone layer and mitigate climate change.

Explanation
The correct answer is Nov 14, 1994. This is the date when the sale of CFC and HCFC refrigerants was restricted to certified technicians. It means that after this date, only technicians who were certified and trained in handling these refrigerants were allowed to purchase and use them. This restriction was put in place to prevent the release of harmful substances into the environment and to ensure that proper handling and disposal practices were followed.