608 Type II

What conditions allow for a system to be opened and repaired without recovering the refrigerant to the required vacuum level?

A system with a large leak and internal pressure of 0 psig

Refrigerant should be recovered from the condenser outlet if the condenser is;

Below the reciever

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

Release into the atmosphere

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.

30%

What must the equipment owners/operators include in recovered refrigerant records for equipment with refrigerant charges that range from 5 to 50 pounds?

The quantity of refrigerant (by type) added or recovered from disposed appliances in each calendar month and quantity of refrigerant (by type) sent for reclamation or destruction.

What happens to a refrigerant that is heated above the saturation temperature?

It remains in the vapor state

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

Which of the following refrigerants is classified as a very high-pressure refrigerant?

R-744

Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by;

EPA approved laboratory

A high-pressure appliance containing 210 lbs. of R-407C refrigerant must be evacuated (recovered) to a level of

10 Inches of Vaccum

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

Low ambient temperature

All HVAC/R systems must be protected by a;

Pressure Relief Valve

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?

10%

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

A-1

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

0 inches of vacuum

EPA regulations require that all Industrial Process Refrigeration (IPR) systems containing more than 50 pounds of refrigerant MUST be repaired when the annual leak rate exceeds;

30%

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

0 inches of mercury

A new split system should be checked for leaks by;

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

When an appliance containing 50 pounds or more of a regulated refrigerant leaks refrigerant at an annual rate of 125% or more, what must be included on the leak inspections records?

Initial verification, verification tests and records of recovered refrigerant from equipment.

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

15

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

compressor

Non-condensables will cause;

High Discharge Pressure

When recovering refrigerant from a medium-pressure system with more than 200 lbs. of refrigerant, recover to a level of

15" Hg

If a leaking appliance with a regulated refrigerant is not going to be repaired, it must be;

retrofitted or retired within 12 months.

When dehydrating a system, it should be evacuated to a minimum level of;

500 microns