EPA Refrigerant Regulations Quiz

A crankcase heater is often used to prevent refrigerant from mixing with compressor oil during periods of:

• Low ambient temperature

• High ambient temperature

• Low humidity

• High humidity

Non-condensables will cause;

• Low superheat

• Low discharge pressure

• High superheat

• High discharge pressure

A new split system should be checked for leaks by;

• pressurizing the system with a few ounces of HCFC-22 and compressed air.

• pressurizing the system with a few ounces of CFC-12 and an inert gas.

• releasing the factory refrigerant charge in the condensing unit.

• pressurizing the system with a few ounces of system refrigerant and an inert gas.

All HVAC/R systems must be protected by a;

• Low-pressure switch

• High-pressure switch

• Compressor impedance overload

• Pressure relief valve

A high-pressure appliance containing less than 200 lbs. of an HCFC or HFC refrigerant must be evacuated (recovered) to a level of;

• 15 inches of vacuum

• 10 inches of vacuum

• 4 inches of vacuum

• 0 inches of vacuum

A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms falls under ASHRAE Standard;

• 15

• 34

• 44

• 60

EPA regulations state that removal of which component constitutes a 'major repair'?

• Pressure switch

• Compressor

• Liquid line drier

• Evaporator fan motor

Refrigerants CFC-12, HCFC-22, and HFC-134a are all classified as Type _______ substances.

• B-1

• B-2

• A-1

• A-2

When using a recovery unit on a system containing 100 lbs. of R-410A it must be evacuated to;

• 0 inches of Mercury

• 4 inches of Mercury

• 10 inches of Mercury

• 15 inches of Mercury

A comfort cooling system that contains 50 pounds or more of R-410A is leaking. What will be the new maximum allowable annual leak rate starting in 2019?

• 5%

• 10%

• 15%

• 20%