While servicing a system, the technician discovers that some R-502 was added to a R-22 system. The technician should:

recover the refrigerant into a separate tank.

vent the refrigerant since it cannot be reclaimed.

recover and use it in a different system.

What effect is ozone depletion having on the environment?

increased ground level ozone (smog)

What does System Dependent (passive) recovery equipment mean?

Using the assistance of components in the appliance for recovery.

Using a separate equipment's compressor for recovery.

Using the vacuum as a recovery tank

Which of the following is TRUE if a system WILL NOT hold a vacuum after it has been evacuated?

The system is ready to be charged.

The system has been adequately evacuated.

How should refrigerant blends be charged?

The same as any other refrigerant.

What is the strongest evidence that HCFCs are in the stratosphere?

Measurement of chlorine in air samples from the lower atmosphere.

Chemical reactions predict there should be HCFCs in the upper atmosphere.

Measurement of HCFCs in air samples from the stratosphere.

Satellite measurements of light passing through the atmosphere.

What should the technician review when working with any solvents, chemicals, or refrigerants?

Moisture solubility data sheets (MSDS)

Chemical compound reference sheets (CCRS)

Chemical composition reference sheets (CCRS)

Which of the following are recommended safe work practices when recovering refrigerants?

Wear safety eyewear and butyl-lined gloves when connecting/disconnecting hoses.

Wear a respirator when working with any refrigerant.

Wear cotton gloves when working with any compressed gas.

Ventilation is only necessary if oil, appearing as a white cloud or fog, is emitted during the recovery procedure.

When brazing or exposing refrigerants to open flames or red hot metal,

R-12 and R-22 can form a phosgene gas.

R-12 and R-22 can form hydrochloric and hydrofluoric acids.

ensure you are in a well ventilated area.

Before beginning a refrigerant recovery procedure, it is necessary to know ________.

the type of refrigerant that is in the system

the pressure of the refrigerant before it enters the compressor

Which of the following factors affect the speed of system dehydration?

The ambient temperature and amount of moisture in the system.

The ambient temperature and the entropy of the refrigerant.

The latent heat content of the refrigerant.

Equipment which is used to recover CFC, HCFC, and HFC refrigerant from small appliances for the purpose of disposal must meet what standard?

Recover 80% of the refrigerant with an inoperative compressor and 90% of the refrigerant with an operative compressor.

Recover 95% or the refrigerant whether or not the compressor is operative.

Recover 90% of the refrigerant with an inoperative compressor and 80% of the refrigerant with an operative compressor.

Recover 75% of the refrigerant within 5 minutes.

All appliances must be equipped with a service aperture or process stub which is used when adding or removing refrigerant from the appliance. What is typically used on small appliances?

A straight piece of tubing that is entered using a piercing access valve.

A line located 15 inches below the compressor

A valve installed at the factory which has a 1/4 inch diameter and machine threads.

A service aperture is not present because small appliances are exempt from this requirement.

What can CFC and HCFC refrigerants decompose into at high temperatures (e.g. open flames, glowing metal surfaces, etc.)?

Hydrochloric and hydrofluoric acids

Phosphoric and dodecylbenzenesulfonic acid

Which of the following statements about recycling and recovery equipment used for stationary refrigeration is FALSE?

Purchases of such equipment must be reported to the EPA

It must be tested by an EPA-approved third party

It must be equipped with low-loss fittings

Equipment designed to recover flammable refrigerant must meet a specific UL safety standard

Which of the following is NOT important to do before recharging any flammable hydrocarbon or HFO refrigerant into a system?

Add an odorant to the system to indicate a flammable refrigerant is being used.

Ensure that the refrigeration system is electrically grounded.

Install a fresh filter-drier and successfully complete a standing-pressure leak check at the maximum system pressure.

Evacuate to 500 microns or lower.

When is a system considered dehydrated?

The vacuum indicator shows you have reached and held a vacuum of 500 microns or less.

The vacuum pump has run at least 12 hours.

The manifold suction gauge has held 30 in. hg/760 mm vacuum for 2 hours.

You are ready to leave for the day.

When pressurizing a refrigeration system with nitrogen what rule should you always follow?

Use a pressure regulator with a pressure relief valve on the nitrogen cylinder.

Never use nitrogen inside the system.

Which of the following is considered an unacceptable release of CFC, HCFC, or HFC refrigerant?

Release during vandalism or theft of equipment.

Release during the procedure of installing manifold gauges equipped with low-loss fittings.

Release during the connection of a recovery machine equipped with low-loss fittings.

Release during a leak-checking procedure using nitrogen and a trace gas.

Which of the following is not a reason to recover refrigerants?

Avoid violating the warranty on equipment.

Provide supplies for service after the refrigerant has been phased out.

Prevent venting to the atmosphere.

Prevent stratospheric ozone depletion.

Which of the following is NOT a "refrigerant" as it is used in Section 608 of the Clean Air Act?

An ozone-depleting substance used in a household or commercial air conditioner.

A non-ozone depleting substance used in a refrigerator or freezer.

Any substitute for a Class I or Class II substance used in a chiller.

Which refrigerant can be purchased by someone who is NOT a Section 608 certified technician?

Hydrochlorofluorocarbon refrigerants

Why are some hydrofluoroolefins (HFOs) classified as A2L?

They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable.

They have toxicity characteristics.

They are prohibited for use in the U.S.

They have high ozone depleting potentials, and low global warming potentials.

EPA 608 Mixed Core-Type II

Authored by Griselda Valerio

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Professional Development

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the phaseout date for the production and import of new R-22 in the U.S.?

2018

2020

2022

2025

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When did it become a violation to vent CFC and HCFCs?

July 1, 1989

July 1, 1992

Nov. 15, 1993

Dec. 31, 1995

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The sale of CFC and HCFC refrigerants has been restricted to certified technicians since

November 15, 1993

July 1, 1992

December 31, 1995

November 14, 1994

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following refrigerants is considered an HFC-type of refrigerant?

R-134a

R-12

R-22

R-11

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which type of refrigerant has the highest Ozone Depletion Potential (ODP)?

HFC

HCFC

CFC

All have the same ODP.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

To clean refrigerant by the use of filter dryers and then reuse it is called ____.

recovery

renew

reclaim

recycle

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

To reprocess refrigerant to meet new product specifications is called ____.

recovery

renew

reclaim

recycle

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EPA 608 Mixed Core-Type II

What is the phaseout date for the production and import of new R-22 in the U.S.?

When did it become a violation to vent CFC and HCFCs?

The sale of CFC and HCFC refrigerants has been restricted to certified technicians since

Which of the following refrigerants is considered an HFC-type of refrigerant?

Which type of refrigerant has the highest Ozone Depletion Potential (ODP)?

To clean refrigerant by the use of filter dryers and then reuse it is called ____.

To reprocess refrigerant to meet new product specifications is called ____.

Refrigerants that are made up of two refrigerants that, when blended in the right proportions, combine to make a third stable refrigerant, are called ____.

While servicing a system, the technician discovers that some R-502 was added to a R-22 system. The technician should:

Which of the following refrigerants does not contain chlorine?

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