EPA: CORE 185 QUESTION PRACTICE TEST

Which refrigerant is an HCFC? a.) R-124 b.) R-134a c.) R-410A d.) R-12

a.) R-124

Silicone elastomers, for use in seals and gaskets, are not compatible with which refrigerants? a.) HCFCs b.) CFCs c.) HFOs d.) HFCs

c.) HFOs

Refrigeration technicians who violate the Clean Air Act can: a.) Lose their EPA certification b.) Be fined c.) Be required to appear in Federal Court d.) All of the above

d.) All of the above

Before shipping any used refrigerant cylinders, check that the cylinder meets what standards: a.) Department of Transportation b.) The Significant New Alternatives Policy (SNAP) c.) Underwriters Laboratories d.) All of the above

a.) Department of Transportation

Which of the following gases help form the earth's protective shield? a.) Chlorine b.) Chlorides c.) Carbon Monoxide d.) Stratospheric Ozone

d.) Stratospheric Ozone

Which atom of the CFC moelcule causes ozone depletion? a.) Fluorine b.) Chlorine c.) Sodium d.) Helium

b) Chlorine

To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis defines; a.) Recovery b.) Reclaiming c.) Reuse d.) Recycle

b.) Reclaiming

The ozone layer protects the earth from: a.) Nuclear radiation b.) Infared radiation c.) Ultraviolet radiation from the sun d.) Bacteria from space

c.) Ultraviolet radiation from the sun

What statement is true about an azeotropic refrigerant mixture? a.) It is alway made from just two components b.) It has a pressure-temperature curve identical to one of its components. c.) It is a mixture that is always made from at least three component refrigerants. d.) It is a mixture that acts like a single-component refrigerant over its entire range.

d.) It is a mixture that acts like a single-component refrigerant over its entire range.

An example of an HFC refrigerant is: a.) R-12 b.) R-22 c.) R-123 d.) R-134a

d.) R-134a

Of the refrigerants listed below, which has the lowest ozone depletion potential? a.) R-22 b.) R-11 c.) R-12 d.) R-113

a. ) R-22

To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least: a.) 0 psig b.) 15 psig c.) 20 psig d.) 28.8 psig

a.) 0 psig

The condenser ___________________. a.) Changes a high-pressure vapor to a high-pressure liquid. b.) Changes a low-pressure vapor to a low-pressure liquid. c.) Changes a high-pressure liquid to a low-pressure liquid. d.) Changes a low-pressure liquid to a low-pressure vapor

a.) Changes a high-pressure vapor to a high-pressure liquid.

In general, blended refrigerants should be charged: a.) As a vapor b.) At very high temperatures c.) As a liquid d.) The same as any other refrigerant

c.) As a liquid

In a refrigeration system, the device that changes a low-pressure vapor to a high-pressure vapor is the: a.) Evaporator b.) Expansion device c.) Compressor d.) Condensor

c.) Compressor

Crop loss, eye disease, and skin cancer have been attributed to; a.) Depletion of Stratospheric nitrogen b.) Depletion of Stratospheric chlorine monoxide c.) Depletion of Stratospheric ozone d.) Depletion of Stratospheric oxygen

c.) Depletion of Stratospheric ozone

Recover any remaining refrigerant and then render the cylinder useless, then recycle the metal is the proper disposal method for; a.) Recovery cylinders b.) One pound cans c.) Disposable cylinders d.) Accumulator cylinders

c.) Disposable cylinders

What type of refrigerant contains no chlorine? a.) HCFCs b.) HCFC blends c.) HFCs d.) CFCs

c.) HFCs

What is one of the most serious results of damage to the ozone layer? a.) Mutations of marine plants b.) Increased volcanic activity c.) Increases in human skin cancer d.) Higher natural background radioactivity

c.) Increases in human skin cancer

In a vapor compression refrigeration system, cooling occurs when: a.) Refrigerant liquid turns to a vapor b.) Refrigerant vapor turns to a liquid c.) The refrigerant is under maximum pressure d.) The refrigerant gives off heat

a.) Refrigerant liquid turns to a vapor e

Which ASHRAE classification means slightly flammable? a.) A1 b.) A2L c.) A3 d.) B1

b.) A2L

A single chlorine atom can destroy how many ozone molecules? a.) 100 b.) 1,000 c.) 10,000 d.) 100,000

100,000

What is the Significant New Alternatives Policy (SNAP) Program? a.) EPA's program that identifies refrigerants with lower overall risks to human health and the environment. b.) Covers only CFC and HCFC refrigerants used in residential air conditioning. c.) Relates to CFC and HCFC refrigerants used in commercial air conditioning. d.) Covers only CFC and HCFC refrigerants used in industrial process refrigeration.

a.) EPA's program that identifies refrigerants with lower overall risks to human health and the environment.

During servicing of a refrigeration system containing R-12, the refrigerant must be: a.) Recovered b.) Recovered and replaced with R-134a, no exceptions c.) Vented d.) Destroyed

a.) Recovered

After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from: a.) Recovery and recycling b.) Solvent conversion c.) European chemical manufacturers d.) Third World chemical manufacturers

a.) Recovery and recycling

Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded: a.) Red b.) White c.) Blue d.) Yellow

a.) Red

What characteristic (s) of CFCs make them more likely to reach the stratosphere than most other compounds containing chlorine? a.) Refrigerants that contain chlorine but not hydrogen are so stable that they do not break down in the lower atmosphere after being released. The chlorine or bromine reacts with ozone, causing it to change back to oxygen, thus destroying the oxzone layer. b.) CFCs are lighters than other damaging compounds, making it easier for them to float upward when released. c.) CFCs are attracted to the static in the atmosphere. d.) CDCs are attracted to dust in the atmosphere.

a.) Refrigerants that contain chlorine but not hydrogen are so stable that they do not break down in the lower atmosphere after being released. The chlorine or bromine reacts with ozone, causing it to change back to oxygen, thus destroying the ozone layer.

The EPA can require a technician to demonstrate their ability to perform proper procedures for recovering and/or recycling refrigerant. Failure to demonstrate competency can result in: a.) Revocation of the technician's certification b.) Seizure of the technician's recovery or recycling equipment. c.) Seizure of any refrigerant purchased by the technician which is still in his/her possession. d.) Mandatory attendance fo

a.) Revocation of the technician's certification.

Refrigerant that is recovered can be returned to: a.) The same system or other systems owned by the same person without restriction. b.) Used in any system serviced that day. c.) Sold a used refrigerant to other customers d.) Called Reclaimed if a filter -drier was used during recovery.

a.) The same system or other systems owned by the same person without restriction

A system is considered dehydrated when: a.) The vacuum indicator shows you have reached and held the required finished vacuum. b.) The vacuum pump has run at least 7 hours. c.) The manifold suction gauge has held a 30 in. Hg./760 mm vacuum for 3 hours. d.) You are ready to leave for the day.

a.) The vacuum indicator shows you have reached and held the required finished vacuum.

HCFCs __________. a.) Will not damage stratospheric ozone but have a high GWP. b.) Will damage stratospheric ozone and have a low GWP. c.) Will not deplete stratospheric ozone and have a low GWP. d.) Are only harmful to ground level ozone.

a.) Will not damage stratospheric ozone but have a high GWP.

An award of up to what amount may be paid to a person supplying information that leads to a penalty against a technician who is intentionally venting? a.) $5,000 b.) $10,000 c.) $27,000 d.) $37,000

b.) $10,000

The Compressor ___________________. a.) Changes a high-pressure vapor to a high-pressure liquid. b.) Changes a low-pressure vapor to a high-pressure vapor. c.) Changes a high-pressure liquid to a low-pressure liquid. d.) Changes a low-pressure liquid to a low-pressure vapor.

b.) Changes a low-pressure vapor to a high-pressure vapor.

A refrigerant cylinder designed to hold recovered refrigerant has a: a.) Yellow body and grey top b.) Grey body and yellow top c.) Green body and yellow top d.) Orange body and grey top

b.) Grey body and yellow top

Refrigerant cannot be called "reclaimed" unless it: a.) Was processed in a reclaiming machine. b.) Has been chemically analyzed and the refrigerant meets the ARI-700 purity standard. c.) Is recovered from a system less than 1 year old. d.) Is recovered from a system still under warranty.

b.) Has been chemically analyzed and the refrigerant meets the ARI-700 purity standard.

HCFCs contain: a.) Chlorine, Fluorine, and Carbon b.) Hydrogen, Chlorine, Fluorine, and Carbon c.) Hydrogen, Fluorine, and Carbon d.) Hydrogen, Fluorine, and Olefin

b.) Hydrogen, Chlorine, Fluorine, and Carbon

Blended refrigerants leak from a system: a.) Faster than other refrigerants b.) In uneven amounts due to different vapor pressures. c.) Slower than other refrigerants d.) Only if the joint fails completely

b.) In uneven amounts due to different vapor pressures.

The low-side test pressure data plate value should be used by a technician to determine a safe pressure for: a.) Recovering refrigerant b.) Leak Testing c.) Refrigerant charging d.) Retrofitting a system

b.) Leak Testing

Which International agreement (Treaty) regulated the production and use of CFCs, HCFCS, halons, methyl chloroform and carbon tetrachloride? a.) Kyoto Treaty b.) Montreal Protocol c.) Council of Nicaea d.) Treaty of Ghent

b.) Montreal Protocol

When using with any solvent, cleaner, chemical or refrigerant, you should review: a.) Moisture solubility information b.) Chemical compound reference sheets c.) Material safety data sheets d.) Chemical composition reference sheets

c) Material safety data sheets

Reusable refrigerant containers under high-pressure must be hydrostatically tested how often? a.) 1 year b.) 3 year c.) 5 years d.) 7 years

c.) 5 years

Ozone depletion potential, or "ODP," is: a.) Always equal to twice the global warming potential, or "GWP" b.) An absolute rating of the health hazard caused by ozone depletion. c.) A measure of the ability of CFCs' and HCFCs' to destroy ozone. d.) A rating for the ground level smog pollution.

c.) A measure of the ability of CFC's and HCFCs' to destroy ozone.

To determine the maximum allowable pressure to use when checking a system, check: a.) With the equipment owner. b.) With the refrigerant pressure/temperature tables c.) The design pressure on the equipment nameplate. d.) Ask the local utility company

c.) The design pressure on the equipment nameplate.

Whenever dry nitrogen from a portable cyclinder is connected to a system, what item is of most importance to consider for safety? a.) The regulator has a new set of gauges. b.) The pressure gauges are clean. c.) There is a relief valve in the downstream line from the pressure regulator. d.) No refrigerant lines can leak

c.) There is a relief valve in the downstream line from the pressure regulator.

An ozone molecule contains; a.) One oxygen atom b.) Two oxygen atoms c.) Three oxygen atoms d.) Four oxygen atoms

c.) Three oxygen atoms

Disposable refrigerant containers are used for ______ refrigerent. a.) Recycled b.) Recovered c.) Virgin d.) Both a and b

c.) Virgin

The chlorine in CFCs and HCFCs; a.) Will dissolve in water b.) Will not dissolve in water c.) Will rain out of the atmosphere d.) Is heaver than air and cannot rise to the stratosphere.

c.) Will not dissolve in water

How much can a person be fined per day per violation for knowingly releasing a regulated substance that violates the Clean Air Act? a.) $10,000 b.) $25,000 c.) $37,000 d.) $44,539

d.) $44,539

The Montreal Protocol is: a.) An energy efficiency test developed by the Canadian government b.) A test procedure for measuring the level of chlorine in the stratosphere c.) A procedure of protocol to test for ozone concentration in the atmosphere. d.) A treaty among nations that controls production of CFC's and HCFC's

d.) A treaty among nations that controls production of CFC's and HCFC's

Which safety precaution (s) should always be followed: a.) Never apply an open flame to a refrigerant cylinder b.) Never cut or weld any refrigerant line when refrigerant is in the line. c.) Never use oxygen to purge lines or to pressurize a system. d.) All of the above.

d.) All of the above

Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources such as volcanoes because: a.) The rise in the amount of chlorine in the stratosphere matches the rise in the amount of fluorine, which has different natural sources than chlorine. b.) The rise in the amount of chlorine in the stratosphere matches the rise in CFC emissions. c.) Air samples taken from the stratosphere over erupting volcanoes show that volcanoes contribute to a small quantity of chlorine to the stratosphere when compared to CFCS. d. All of the above

d.) All of the above.

Which of the following has the highest Ozone Depletion Potential? a.) HFOs b.) HCFCs c.) HFCs d.) CFCs

d.) CFCs

The molecule found in CFCs and HCFCs that depletes ozone is: a.) Fluorine b.) Hydrogen c.) Carbon d.) Chlorine

d.) Chlorine

Which of the following refrigerants is a HFO? a.) R-22 b.) R-134a c.) R-410A d.) R-1234ze

d.) R-1234ze

Clean refrigerant for reuse by separating the oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more filter driers, is the definition of: a.) Recover b.) Reclaim c.) Reuse d.) Recycle

d.) Recycle

Chlorofluorcarbons (CFCs) and hydrochlorfluorocarbons (HCFCS) have which of the following in common? a.) They have identical ODP;s b.) They both contain hydrogen c.) They have the same normal boiling points d.) They must be recovered before opening or disposing of appliances.

d.) They must be recovered before opening or disposing of appliances.