EPA Section 608: Core
Settings
EPA Section 608 Study Questions Pool Section: CORE Questions: 160
- 1.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
- 2.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
- 3.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 as used refrigerant to other customers
- D.
Called reclaimed if a filter-drier was used during recovery
- 4.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.
- 5.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 position.
- D.
Mandatory attendance at a refrigerant training camp
- 6.
- 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.
- B.
CFCs are lighter 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.
CFCs are attracted to dust in the atmosphere.
- 7.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 30in hg./760 mm vacuum for 3 hours
- D.
You are ready to leave for the day
- 8.Disposable refrigerant containers are used for ___ refrigerant.
- A.
Recycled
- B.
Recovered
- C.
Virgin
- D.
Both a and b
- 9.Which refrigerant is an HCFC?
- A.
R-124
- B.
R-134a
- C.
R-410a
- D.
R-12
- 10.
- A.
It is always 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.
- 11.Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (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 applicances.
- 12.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
- 13.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
- 14.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
- 15.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 falls completely
- 16.Which of the following gases help from the earth's protective shield?
- A.
Chlorine
- B.
Chlorides
- C.
Carbon Monoxide
- D.
Stratospheric Ozone.
- 17.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.
Condenser
- 18.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 a small quantitiy of chlorine to the stratosphere when compared to CFCs
- D.
All of the above.
- 19.Which atom of the CFC molecule causes ozone depletion?
- A.
Fluorine
- B.
Chlorine.
- C.
Sodium
- D.
Helium
- 20.The ozone layer protects the earth from:
- A.
Nuclear radiation
- B.
Infrared radiation
- C.
Ultraviolet radiation from the sun.
- D.
Bacteria from space
- 21.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
- 22.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
- 23.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 or protocol to test for ozone concentration in the atmosphere
- D.
A treaty among nations that controls production of CFCs and HCFCs.
- 24.Which refrigerant is an HCFC?
- A.
R-123.
- B.
R-134a
- C.
R-410a
- D.
R-12
- 25.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
- 26.Of the refrigerants listed below, which has t he lowest ozone depletion potential?
- A.
R-22
- B.
R-11
- C.
R-12
- D.
R-113
- 27.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
- 28.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 ground level smog pollution.
- 29.An example of an HFC refrigerant is:
- A.
R-12
- B.
R-22
- C.
R-123
- D.
R-134a
- 30.Whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most importance in consideration of 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.
- 31.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
- 32.Which safety precaution(s) should be always followed:
- A.
Never apply an open flame to a refrigerant cylnder
- 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
- 33.In a vapor compression refrigeration system, cooling occurs when:
- A.
Refrigerant liquid turns to vapor.
- B.
Refrigerant vapor turns to liquid.
- C.
The refrigerant is under maximum pressure.
- D.
The refrigerant gives off heat.
- 34.The evacuation of a system is a method of:
- A.
Pinpointing the location of leaks.
- B.
Acid removal.
- C.
Dehydration.
- D.
All of the above.
- 35.Each chlorine atom in the stratosphere can destroy ___ ozone molecules.
- A.
100
- B.
1,000
- C.
10,000
- D.
100,000
- 36.An example of an HFC refrigerant is:
- A.
R-11
- B.
R-124
- C.
R-142b
- D.
R-410a
- 37.Which gas(es) would cause the LEAST damage to the environment during a leak check?
- A.
Dry nitrogen and R-22
- B.
Dry nitrogen and R-12
- C.
Compressed air and R-12
- D.
Dry nitrogen
- 38.Refrigerant migrates to the compressor crankcase because of a difference in __________ between the refrigerant and the oil.
- A.
Vapor pressure
- B.
Acidity
- C.
Volume
- D.
Density
- 39.Which refrigerant is an HCFC?
- A.
R-22
- B.
R-134a
- C.
R-410a
- D.
R-12
- 40.It is important not to mix R-22 and R-410A refrigerants in the same container because:
- A.
The mixture may be impossible to reclaim.
- B.
The mixture will explode.
- C.
The mixture is corrosive.
- D.
They use different oils.
- 41.When using recovery unit, the fill level of the recovery tank can be controlled by:
- A.
A mechanical float switch.
- B.
An electronic shut-off device.
- C.
Weight.
- D.
All of the above.
- 42.Which of the following refrigerant releases is a violation of the EPA prohibition on venting?
- A.
Release of "de minimis" quantities in the course of making good faith attempts to recover refrigerant.
- B.
Release of mixtures of nitrogen and refrigerant that result from adding nitrogen to a fully charged appliance to "leak-check" the appliance
- C.
Refrigerants emitted in the course fo normal operation of an appliance
- D.
"de minimis" refrigerants vented when connecting or disconnecting self-sealing hoses to charge a unit
- 43.Which of the following human health effects could result from an increase in ultraviolet radiation?
- A.
An increase in cataracts cases
- B.
An increase in male infertility cases
- C.
An increase in heat prostration with the elderly
- D.
An increase in the number of thyroid disorders
- 44.
- A.
It can result in venting refrigerant to the atmosphere.
- B.
The tank may explode, causing serious injury to people nearby.
- C.
Refrigerant in the tank may decompose, forming a toxic material.
- D.
All of the above.
Back to top