EPA608 Universal UPDATED ACTUAL
Exam Questions and CORRECT Answers
Which atom of the CFC molecule causes ozone depletion? - chlorine - CORRECT ANSWER
The ozone layer protects the earth from: - ultraviolet radiation from the sun. - CORRECT
ANSWER
When using with any solvent, cleaner, chemical or refrigerant, you should review: - material
safety data sheets. - CORRECT ANSWER
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? - 10,000 - CORRECT ANSWER
The Montreal Protocol is: - a treaty among nations that controls production of CFCs and HCFCs.
- CORRECT ANSWER
Which refrigerant is an HCFC? - R-123, R-22, R-124 - CORRECT ANSWER
What is one of the most serious results of damage to the ozone layer? - increases in human skin
cancer - CORRECT ANSWER
Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)? - R-22 -
CORRECT ANSWER
To determine the maximum allowable pressure to use when checking a system, check: - the
design pressure on the equipment nameplate - CORRECT ANSWER
Ozone depletion potential, or "ODP," is: - A measure of the ability of CFCs and HCFCs to
destroy ozone. - CORRECT ANSWER
,An example of an HFC refrigerant is: - R-134a - CORRECT ANSWER
Whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most
importance in consideration of safety? - There is relief in the downstream line from the pressure
regulator. - CORRECT ANSWER
During servicing of a refrigeration system containing R-12, the refrigerant must be: - recovered. -
CORRECT ANSWER
Which safety precaution(s) should always be followed: - Never apply an open flame to a
refrigerant cylinder; never cut or weld any refrigerant line when refrigerant is in the line; never
use oxygen to purge lines or to pressurize a system. - CORRECT ANSWER
In a vapor compression refrigeration system, cooling occurs when: - refrigerant liquid turns to a
vapor. - CORRECT ANSWER
The evacuation of a system is a method of: - dehydration. - CORRECT ANSWER
Each chlorine atom in the stratosphere can destroy____ozone molecules. - 100,000 - CORRECT
ANSWER
An example of a HFC refrigerant is: - R-410A - CORRECT ANSWER
Which gas(es) would cause the LEAST damage to the environment during a leak check? - dry
nitrogen - CORRECT ANSWER
Refrigerant migrates to the compressor crankcase because of a difference in______between the
refrigerant and the oil. - vapor pressure. - CORRECT ANSWER
, Which refrigerant is an HCFC? - R-22, R-123, R-124 - CORRECT ANSWER
It is important not to mix R-22 and R-410A refrigerants in the same container because: - the
mixture may be impossible to reclaim. - CORRECT ANSWER
When using recover unit, the fill level of the recovery tank can be controlled by: - a mechanical
switch; an electronic shut-off device; weight - CORRECT ANSWER
Which of the following refrigerant releases is a violation of the EPA prohibition on venting? -
release of mixtures of nitrogen and refrigerant that result from adding nitrogen to a fully charged
appliance to "leak-check" the appliance. - CORRECT ANSWER
Which of the following human health effects could result from an increase in ultraviolet
radiation? - an increase in cataracts cases - CORRECT ANSWER
Never use an open flame to heat a refrigerant tank because: - it can result in venting refrigerant to
the atmosphere; the tank may explode, causing serious injury to people nearby; refrigerant in the
tank may decompose, forming a toxic material. - CORRECT ANSWER
When transporting cylinders containing used refrigerant, the DOT requires that you: - attach
DOT classification tags - CORRECT ANSWER
According to ASHRAE's 1992 refrigerant safety classification which of the following
designations would be the most safe? - A-1 - CORRECT ANSWER
The over-evacuation of a system: - does not occur. - CORRECT ANSWER
Equipment covered by EPA regulations include: - all air-conditioning and refrigeration
equipment using CFC, HCFC or HFC refrigerants. - CORRECT ANSWER
Exam Questions and CORRECT Answers
Which atom of the CFC molecule causes ozone depletion? - chlorine - CORRECT ANSWER
The ozone layer protects the earth from: - ultraviolet radiation from the sun. - CORRECT
ANSWER
When using with any solvent, cleaner, chemical or refrigerant, you should review: - material
safety data sheets. - CORRECT ANSWER
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? - 10,000 - CORRECT ANSWER
The Montreal Protocol is: - a treaty among nations that controls production of CFCs and HCFCs.
- CORRECT ANSWER
Which refrigerant is an HCFC? - R-123, R-22, R-124 - CORRECT ANSWER
What is one of the most serious results of damage to the ozone layer? - increases in human skin
cancer - CORRECT ANSWER
Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)? - R-22 -
CORRECT ANSWER
To determine the maximum allowable pressure to use when checking a system, check: - the
design pressure on the equipment nameplate - CORRECT ANSWER
Ozone depletion potential, or "ODP," is: - A measure of the ability of CFCs and HCFCs to
destroy ozone. - CORRECT ANSWER
,An example of an HFC refrigerant is: - R-134a - CORRECT ANSWER
Whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most
importance in consideration of safety? - There is relief in the downstream line from the pressure
regulator. - CORRECT ANSWER
During servicing of a refrigeration system containing R-12, the refrigerant must be: - recovered. -
CORRECT ANSWER
Which safety precaution(s) should always be followed: - Never apply an open flame to a
refrigerant cylinder; never cut or weld any refrigerant line when refrigerant is in the line; never
use oxygen to purge lines or to pressurize a system. - CORRECT ANSWER
In a vapor compression refrigeration system, cooling occurs when: - refrigerant liquid turns to a
vapor. - CORRECT ANSWER
The evacuation of a system is a method of: - dehydration. - CORRECT ANSWER
Each chlorine atom in the stratosphere can destroy____ozone molecules. - 100,000 - CORRECT
ANSWER
An example of a HFC refrigerant is: - R-410A - CORRECT ANSWER
Which gas(es) would cause the LEAST damage to the environment during a leak check? - dry
nitrogen - CORRECT ANSWER
Refrigerant migrates to the compressor crankcase because of a difference in______between the
refrigerant and the oil. - vapor pressure. - CORRECT ANSWER
, Which refrigerant is an HCFC? - R-22, R-123, R-124 - CORRECT ANSWER
It is important not to mix R-22 and R-410A refrigerants in the same container because: - the
mixture may be impossible to reclaim. - CORRECT ANSWER
When using recover unit, the fill level of the recovery tank can be controlled by: - a mechanical
switch; an electronic shut-off device; weight - CORRECT ANSWER
Which of the following refrigerant releases is a violation of the EPA prohibition on venting? -
release of mixtures of nitrogen and refrigerant that result from adding nitrogen to a fully charged
appliance to "leak-check" the appliance. - CORRECT ANSWER
Which of the following human health effects could result from an increase in ultraviolet
radiation? - an increase in cataracts cases - CORRECT ANSWER
Never use an open flame to heat a refrigerant tank because: - it can result in venting refrigerant to
the atmosphere; the tank may explode, causing serious injury to people nearby; refrigerant in the
tank may decompose, forming a toxic material. - CORRECT ANSWER
When transporting cylinders containing used refrigerant, the DOT requires that you: - attach
DOT classification tags - CORRECT ANSWER
According to ASHRAE's 1992 refrigerant safety classification which of the following
designations would be the most safe? - A-1 - CORRECT ANSWER
The over-evacuation of a system: - does not occur. - CORRECT ANSWER
Equipment covered by EPA regulations include: - all air-conditioning and refrigeration
equipment using CFC, HCFC or HFC refrigerants. - CORRECT ANSWER
