EPA 608 Custom Study Guide

What is the ODP of R-441a?

0

What is the ODP of R-600a?

0

What is the least possible ODP for a refrigerant?

0

What is highest possible ODP for any CFC, HCFC, HFC, or HFO refrigerant?

1

Which class refers to a refrigerant that is not flammable at all?

1

R-12 has a GWP in which of the following ranges?

10,000-50,000

R-410a has a GWP in which of the following ranges?

1000-10,000

In the United States, when were all CFCs phased out by?

1995

Which class refers to a refrigerant that has low flammability?

2

In the United States, when were R-22 and R-142b phased out?

2020

In the United States, when will all HCFCs be phased out?

2030

If you need to get Type III certification, which of the following will be on your exam?

50 questions - 25 Core questions and 25 Type III questions

Which of the following refrigerants is not covered by the sales restriction of Section 608?

R-717

What information needs to be on the label of a container sent for reclamation?

Refrigerant type

What does the new subclass (2L) describe?

Refrigerants that are Class 2 and burn slowly

Which of the following are considered de minimis releases of refrigerant?

Release of HFCs due to catastrophic failure of equipment, and HCFCs released when disconnecting hoses equipped with low loss fittings.

If we have two HFC refrigerants, we can use the same recovery cylinder because they are the same type of refrigerant.

False

In a zeotropic blend, all refrigerants have the same boiling point.

False

MVACs are considered Type I appliances under Section 608 but MVAC-like systems are not.

False

New household refrigerators and freezers containing R-290 can contain 3 lbs of refrigerant.

False

Nitrogen can be used to pressurize or blow debris out of a system containing a half charge of refrigerant.

False

Only refrigerant blends without HFCs are acceptable under the SNAP program.

False

Polyolester oils are great because they can mix with a lot of other oils.

False

R-1234yf is not miscible in any refrigerant oils.

False

R-22, R-123, and R-124 are not HCFC's

False

R-407c is an azeotropic blend.

False

Refrigerant blends take on the ASHRAE number of the main refrigerant in the blend.

False

The GWPs of HFOs and HCs are close to those of HCFCs.

False

The lowest number for an ozone depletion potential (ODP) is 1.

False

There are no replacements for R-22 refrigerant.

False

Trace gases used for leak detection cannot be vented because they contain ODS.

False

When sending used refrigerants to be reclaimed, you must use disposable refrigerant cylinders.

False

After being phased out, where can technicians obtain refrigerant to service equipment that contains that refrigerant?

From Recovered and Reclaimed Refrigerant

What will backseating a suction shut-off valve close?

Gauge port

R-134a is the same as

HFC-134a

R-410a is the same as

HFC-410a

What is the state of the refrigerant leaving the receiver in a refrigeration system?

High Pressure Liquid

When refrigerant enters the metering device, what is the state of the refrigerant?

High pressure liquid

Which of the following is not correct for household refrigerators?

Hydrocarbons are sometimes not approved for retrofit applications

HFOs contain ?

Hydrogen, Fluorine, Carbon

R-290

Is propane and has a GWP of near zero making it safe

Fractionation

Is when refrigerants settle into layers

If a refrigerant has an ODP of 0.5

It contains chlorine, and could be R-22.

Who does not need to maintain proper records of refrigerants?

The EPA

Temperature glide is:

The difference between the bubble and dew point

Under Section 608 Regulations, who is responsible for ensuring that all refrigerant is removed before disposing of equipment that contains refrigerant?

The final person in the disposal chain

The dew point is

The temperature that the first refrigerant in a blend turns to liquid

The bubble point is

The temperature that the first refrigerant in a blend turns to vapor

What are refrigeration and air-conditioning compressor heaters used for?

To reduce the amount of refrigerant in the oil.

Alkylbenzene (AB) oil is miscible in HCFC refrigerant.

True

An ideal oil is readily miscible with the refrigerant in the system.

True

B2 refrigerants are safer than B3?

True

Carbon Dioxide has an ODP of 0 and a GWP of 1

True

HCFC and HCFC Blends use Alkylbenzene Oils?

True

Hydrocarbons are generally A3 refrigerants.

True

Hydrolysis is when refrigerant oils break down in the presence of water.

True

If we decrease the pressure of a substance, its boiling point decreases.

True

R-11 and R-12 are CFC's?

True

R-134a and R-32 are HFC's

True

R-407c is an azeotropic blend.

True

R-410a is a A1 refrigerant. It is non-toxic and has low flammability, making it one of the safest refrigerants to use.

True

R-450a is an acceptable substitute for use in new household refrigerators and freezers under SNAP. This means new household refrigerators and freezers can be factory charged with R-450a.

True

Section 608 is part of the Clean Air Act.

True

Type I systems can have 3 pounds of refrigerant.

True

How would you remove moisture from refrigerants in a system?

Use a filter drier.

Do you expect to see R-407c in new household refrigerators and freezers?

False

GWP is a measure of how much energy a gas traps in the atmosphere over 100 years

False

If I don't have Section 608 certification, I can buy 3 lb cans of R-134a.

False

If a household freezer contains R-22, we can retrofit it to operate on:

R-410a

Which of the following natural refrigerants?

A & B

Which of the following refrigerants have an ODP of greater than 0?

A & B

B2 refrigerants are more dangerous than which of the following?

A1, A2, B1

HFO refrigerants are this safety classification

A2L

Hygroscopic oils

Absorb moisture readily

When shipping refrigerant that has been used, we must use do which of the following?

All of the above

Which of the following is true?

All of these

Isobutane is

An acceptable substitute for all new household refrigerators and freezers

What are the main safety concerns with R-410a?

Asphyxia

Which class refers to a refrigerant with high toxicity?

B

Which types of refrigerants have the lowest GWPs?

B & C

If a gas has a GWP of 50, it means it has 50 times less global warming potential than carbon dioxide.

False

Which organization can test your recovery equipment used to service a system with R-12?

Both UL and AHRI

New household refrigerators and freezers can be factory charged with

Both a and b

Equipment has to be certified to EPA standards in order to recover which of the following refrigerants?

CFC's, HCFC's, HFC's

Which of the following do Section 608 regulations apply to?

CFC's, HCFC's, HFC's

R-12 is the same as

CFC-12

Which gas is used as a reference for measuring GWP?

Carbon dioxide

Ammonia is safe to use because it is a natural refrigerant.

False

An ideal oil is best at handling high temperatures and high pressures.

False

As long as an oil is not flammable at the starting and ending temperature, it can be used because the system is contained.

False

Which of the following is not true?

None of these

When shipping refrigerants in hazard class 2.2, what information needs to be on the shipping paper?

Number of cylinders of each gas.

If we are retrofitting a system to use R-134a, which oil do we need to use?

Polyolester (POE)

Of the following refrigerants, which one has the highest global warming potential (GWP)?

R-12

Which of the following refrigerants would be used in a low-pressure appliance?

R-123

Of the following refrigerants, which one has the least global warming potential (GWP)?

R-1234yf

Which of the following are HFOs?

R-1234yf

Which of the following are HFC's

R-125

Which of the following is an HCFC?

R-22