EPA 608 Core- Mainstream Engineering

All CFC, HCFC, and HFC refrigerant recovery devices must _________________.

meet EPA standards

The capacity of a vacuum pump and its suction line size affect ___________.

moisture removal and evacuation time

Ozone contains ______________.

molecules containing 3 oxygen atoms

All refrigerants _________________.

must be recovered before opening or disposing of appliances

Over-evacuation of a system can ___________________.

never occur; you can never pull too many impurities from a system

Before disposing of any appliance containing refrigerant __________________.

recover the refrigerant

During servicing of any refrigeration system, the refrigerant must be______________.

recovered

After a refrigerant is phased-out, supplies of that refrigerant for equipment servicing can only come from __________________.

recovered and reclaimed gas

A "self-contained" recovery device ________________.

removes refrigerant with the assistance of components in the appliance

If technicians lose their certification card, they must_________________.

request a replacement from the company that provided the certification

Service hoses used for system evacuation _________________.

should be equal to or larger than the pump intake connection for faster evacuation

A ________________ recovery device uses the compressor in the appliance and/or the pressure of the refrigerant in the appliance.

system-dependent

Distributors must verify __________________ before they can sell refrigerant.

that the purchaser employs at least one Section 608 certified technician

When disposing of an appliance with 5-50 pounds of refrigerant, you must record_______________.

the type of refrigerant recovered

The release of any CFC, HCFC, or HFC refrigerant during ______________ is illegal.

theft of equipment

A system is evacuated ___________________.

to dehydrate the system

You heat a system during dehydration ____________________

to raise the vapor pressure of the water in the system and decrease dehydration time

When measuring a vacuum of the system, the vacuum gauge should be connected ________.

to the system as far as possible away from the vacuum pump

When servicing an R-22 system you CANNOT _______.

top off the unit with R-407C

The stratospheric ozone layer protects us from ___________________.

ultraviolet radiation from the sun

Dehydrating means to remove ______________.

water and water vapor

Always measure the final system vacuum __________________.

with the system isolated from the vacuum pump

Why is venting an "exempt refrigerant" legal?

Because the EPA has determined that the refrigerant does not pose a threat to the environment if released

_____________ refrigerants are the most harmful to stratospheric ozone.

CFCs

_____________ refrigerants have the highest ODP.

CFCs

What gas is used as the baseline measurement for GWP?

Carbon dioxide

Which health effect increases from loss of the stratospheric ozone layer?

Cases of cataracts and skin cancer

A reduction in stratospheric ozone causes _______________.

Decreased crop yields and damage to marine organisms

Which appliances are NOT covered by EPA regulations?

Desiccant dehumidifiers

Which gas would cause the least damage when used for leak checking?

Dry nitrogen alone

What is being done in the U.S. to stop damage to the stratospheric ozone layer?

Eliminating the use of CFCs and HCFCs refrigerants

Which is a violation of EPA or Clean Air Act regulations?

Failing to evacuate refrigerant in a leaking system to at least 0 psig

The ability of a substance to destroy ozone in the stratosphere is referred to as ___________________.

ODP (ozone depletion potential)

What action violates the EPA's prohibition on venting?

Opening the system without properly recovering the refrigerant first

What does a Section 608 certification allow a technician to do?

Purchase or handle controlled refrigerants

An example of an HCFC refrigerant is:

R-123

______________ contains chlorine.

R-22

_____________________ refrigerant has an ODP that is greater than 1.

R-22

How should disposable cylinders be discarded?

Recover all remaining refrigerant, render the cylinders useless, and recycle the metal.

Which refrigerant release is allowable by the EPA because the refrigerant is "exempt."

Releasing isobutane from a household freezer

What does NOT require Section 608 certification?

Rewiring a condenser fan

Which of the following is a lawful use of HCFC-22?

Servicing existing R-22 systems

The ___________ identifies alternative refrigerants for use program.

Snap Program

Which of the following gases help form the earth's protective shield?

Stratospheric ozone

How does the GWP of R-410A compare to carbon dioxide?

The GWP of R-410A is thousands of times greater.

How does the GWP of R-441A compare to the GWPs of R-410A?

The GWP of R-441A is significantly lower.

EPA regulations only allow recovered or recycled refrigerant to be _________________.

charged into the same or another appliance owned by the same person

Ozone depletion is caused by ______________ in HCFC refrigerants

chlorine

If a system cannot maintain a vacuum, the system ______________.

could have a leak or still be evaporating off trapped refrigerant or moisture

Reclaimed refrigerant must be tested to meet __________________ before it can be resold.

AHRI 700

Which action is a violation of the prohibition on venting refrigerants?

Adding nitrogen to a fully charged appliance to leak check the appliance and then venting the mixture

The Montreal Protocol is ________________________.

An international treaty that addresses ozone-depleting substances and their alternatives

How much can a technician be fined for venting a non-exempt refrigerant from a system?

$44,539 per day per violation

What are the characteristics of hydrofluoroolefins and hydrocarbon refrigerants?

0 ODP and low GWP

According to the Roland-Molina theory, _________ are destroyed by each chlorine atom in the stratosphere.

100,000 ozone molecules

The production and import of new R-22 in the U.S. to service existing systems is banned beginning in ________.

2020

Ozone depletion in the stratosphere is what type of problem?

Global problem

________________damages stratospheric ozone.

HCFCs

Which of the following proves that HCFCs are in the stratosphere?

HCFCs found in air samples from the stratosphere.

Which type of refrigerant typically has the lowest global warming potential?

HFOs

HCFC refrigerants are made up of ___________________.

Hydrogen, chlorine, fluorine, and carbon

What is one of the most serious results of loss of the stratospheric ozone layer?

Increased rates of skin cancer

Which of the following is illegal?

Knowingly releasing refrigerants during the service, maintenance, repair, or disposal of appliances

What happens when EPA regulations change after a technician is certified?

The technician has a responsibility to keep up with changes in EPA regulations.

What makes HFC refrigerants damaging to the environment?

They can have very high global warming potentials.

A system is considered dehydrated when ________________________.

a micron-gauge shows you have reached and held a vacuum of 500 microns or less with the vacuum pump isolated from the system

EPA regulations require appliances to have ___________.

a service aperture or process stub

Which refrigerant(s) must be recovered __________________

all non-exempt refrigerants

The service hose between the system and the vacuum pump should _______.

be as short as possible

Technicians who violate Clean Air Act provisions __________________.

can lose their certification

State and local governments __________________.

can make laws that are stricter requirements than the federal regulations

What refrigerant servicing does NOT require Section 608 certification?

carbon dioxide refrigerant

CFCs and HCFCs _____________making them capable of reaching the stratospheric ozone layer.

do not dissolve in water or easily break down in the atmosphere

The EPA considers _________________the most effective for locating the general area of a small leak.

electronic or ultrasonic tester

The EPA's "safe disposal requirements" make the __________________ responsible for ensuring that all refrigerant has been removed from household refrigerators before they are disposed.

final person in the disposal chain