EPA 608 UNIVERSAL
COMPLETE QUESTION SET WITH VERIFIED
SOLUTIONS GRADED A+
Question 1.
According to the EPA, a_______ leak detection method is considered to be the most effective for locating
the general area of a small leak. - electronic or ultrasonic tester
ANSWER
Question 2.
To obtain an accurate vacuum readings during system evacuation, the system vacuum gauge should
be located: - as far from the vacuum pump as possible.
ANSWER
Question 3.
Which type of refrigerants are chlorine-free? - HFCs
ANSWER
Question 4.
Which type of refrigerant is the most harmful to stratospheric ozone? - CFC
ANSWER
Question 5.
______________refers to the process of cleaning refrigerant by oil separation and single or multiple
passes through filter-driers, which reduce moisture and acidity? - Recycling
ANSWER
,Question 6.
Which atom of the CFC molecule causes ozone depletion? - chlorine
ANSWER
Question 7.
Which refrigerant contains a CFC? - R-12
ANSWER
Question 8.
The proper method of discarding a disposable refrigerant cylinder is to: - assure that all refrigerant is
recovered and that the cylinder is rendered useless, then recycle the metal.
ANSWER
Question 9.
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.
ANSWER
Question 10.
What factor(s) affects the speed of evacuation? - the size of the equipment being evacuated; the
ambient temperature; the amount of moisture in the system
ANSWER
Question 11.
Which of the following human health effects could result from an increase in ultraviolet radiation? - an
increase in cataracts cases
ANSWER
, Question 12.
When using nitrogen to pressurize a system, you should always:
- charge though a pressure regulator.
ANSWER
Question 13.
The type of oil that is most commonly used in stationary air conditioning applications with HFC-410A
refrigerant is: - ester oil.
ANSWER
Question 14.
It is illegal to: - knowingly release any refrigerant during the service, maintenance, repair or disposal of
appliances, with the exception of de minimis releases.
ANSWER
Question 15.
Long hoses between the unit and the recovery machine should not be used because they cause: -
excessive pressure drop; increased recovery time; increased emissions
ANSWER
Question 16.
Ozone depletion potential, or "ODP," is: - A measure of the ability of CFCs and HCFCs to destroy ozone.
ANSWER
Question 17.
Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be
considered: - System-dependent
ANSWER
COMPLETE QUESTION SET WITH VERIFIED
SOLUTIONS GRADED A+
Question 1.
According to the EPA, a_______ leak detection method is considered to be the most effective for locating
the general area of a small leak. - electronic or ultrasonic tester
ANSWER
Question 2.
To obtain an accurate vacuum readings during system evacuation, the system vacuum gauge should
be located: - as far from the vacuum pump as possible.
ANSWER
Question 3.
Which type of refrigerants are chlorine-free? - HFCs
ANSWER
Question 4.
Which type of refrigerant is the most harmful to stratospheric ozone? - CFC
ANSWER
Question 5.
______________refers to the process of cleaning refrigerant by oil separation and single or multiple
passes through filter-driers, which reduce moisture and acidity? - Recycling
ANSWER
,Question 6.
Which atom of the CFC molecule causes ozone depletion? - chlorine
ANSWER
Question 7.
Which refrigerant contains a CFC? - R-12
ANSWER
Question 8.
The proper method of discarding a disposable refrigerant cylinder is to: - assure that all refrigerant is
recovered and that the cylinder is rendered useless, then recycle the metal.
ANSWER
Question 9.
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.
ANSWER
Question 10.
What factor(s) affects the speed of evacuation? - the size of the equipment being evacuated; the
ambient temperature; the amount of moisture in the system
ANSWER
Question 11.
Which of the following human health effects could result from an increase in ultraviolet radiation? - an
increase in cataracts cases
ANSWER
, Question 12.
When using nitrogen to pressurize a system, you should always:
- charge though a pressure regulator.
ANSWER
Question 13.
The type of oil that is most commonly used in stationary air conditioning applications with HFC-410A
refrigerant is: - ester oil.
ANSWER
Question 14.
It is illegal to: - knowingly release any refrigerant during the service, maintenance, repair or disposal of
appliances, with the exception of de minimis releases.
ANSWER
Question 15.
Long hoses between the unit and the recovery machine should not be used because they cause: -
excessive pressure drop; increased recovery time; increased emissions
ANSWER
Question 16.
Ozone depletion potential, or "ODP," is: - A measure of the ability of CFCs and HCFCs to destroy ozone.
ANSWER
Question 17.
Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be
considered: - System-dependent
ANSWER
