Type II Practice Questions

Leaks must be repaired on industrial process and refrigeration units with a 50-pound charge or greater when the annualized leak rate reaches _____ or more.

• 10%

• 20%

• 30%

• 40%

Unless plans are made to replace a system with a leak rate that exceeds the maximum leak rate, repairs must be made within;

• 30 days.

• 45 days.

• 60 days.

• 90 days.

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

• B-1

• B-2

• A-1

• A-2

All HVAC/R systems must be protected by a;

• Low-pressure switch

• High-pressure switch

• Compressor impedance overload

• Pressure relief valve

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

• A. 15

• B. 34

• C. 44

• D. 60

Non-condensables will cause;

• Low superheat

• Low discharge pressure

• High superheat

• High discharge pressure

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

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

• Pressure switch

• Compressor

• Liquid line drier

• Evaporator fan motor

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%

What can be done with a refrigerant trace gas and nitrogen mixture after a system leak is found?

• Recover the mixture.

• Recover in a special recovery tank.

• Recycle the refrigerant back into the system.

• Release to the atmosphere.