EPA 608 EXAM PRACTICE QUESTIONS 1-100
|COMPLETE STUDY GUIDE WITH 100% ACCURATE
QUESTIONS &ANSWERS. EXCELLENCE
GUARANTEED.
Ozone depletion is caused by _______ in HFC refrigerants. Answer: chlorine
CFCs and HCFCs ________ making them capable capable of reaching the
stratospheric ozone layer. Answer: do not dissolve in water or easily break down in
the atmosphere
According to the Rolanda-Molina theory, ________ are destroyed by each chlorine
atom in the stratosphere. Answer: 100,000 ozone molecules
The stratospheric ozone layer protects us from _______. Answer: ultraviolet
radiation from the sun
Which health effect increases from loss of the stratospheric ozone layer? Answer:
cases of cataracts or skin cancer
What proves that HCFCs are in the stratosphere? Answer: HCFCs found in air
samples from the stratosphere.
What makes HFC refrigerants damaging to the environment? Answer: They can
have very high global warming potentials.
_______ makes HFO refrigerants less flammable than HC refrigerants. Answer:
Flourine
Which refrigerant contains chlorine? Answer: R-12
HFO refrigerants are miscible in _______ lubricants. Answer: POE lubricants
An example of HcFC refrigerant is: ______ Answer: R-123
What is being done in the U.S. to stop damage to the stratospheric ozone layer?
Answer: Eliminating the use of CFCs and HCFCs refrigerants
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, EPA regulations require appliances to have _________. Answer: a service aperture
or process hub
The release of any CFC, HCFC, or HFC refrigerant during _________ is illegal.
Answer: theft of equipment
____________ is the only EPA SNAP approved "drop in" replacement for
R-22. Answer: There are no direct drop-in refrigerant substitutes
Ester-based oils like POE can be mixed with ________. Answer: no other oils
What provides the cooling in a vapor compression refrigeration system? Answer:
The vaporization of the liquid refrigerant
An oil sample might be taken when __________. Answer: a. moisture and/or acid
problems are suspected
b. oil sludge formation or oil waxing is suspected
c. residual acidic oil from a burn-out is suspected of contaminating the replacement
oil
________ returns refrigerant to new product specifications and requires chemical
analysis to verify the purity to AHRI-700 standards. Answer: reclaiming
The EPA considers _________ the most effective for locating the general area of a
small leak. Answer: electronic or ultrasonic tester
Low ambient temperatures __________ recovery time. Answer: increase
A system is considered dehydrated when _________. Answer: a micron gauge
shows you have reached and held a vacuum of 500 microns or less with the vacuum
pump isolated from the system
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
|COMPLETE STUDY GUIDE WITH 100% ACCURATE
QUESTIONS &ANSWERS. EXCELLENCE
GUARANTEED.
Ozone depletion is caused by _______ in HFC refrigerants. Answer: chlorine
CFCs and HCFCs ________ making them capable capable of reaching the
stratospheric ozone layer. Answer: do not dissolve in water or easily break down in
the atmosphere
According to the Rolanda-Molina theory, ________ are destroyed by each chlorine
atom in the stratosphere. Answer: 100,000 ozone molecules
The stratospheric ozone layer protects us from _______. Answer: ultraviolet
radiation from the sun
Which health effect increases from loss of the stratospheric ozone layer? Answer:
cases of cataracts or skin cancer
What proves that HCFCs are in the stratosphere? Answer: HCFCs found in air
samples from the stratosphere.
What makes HFC refrigerants damaging to the environment? Answer: They can
have very high global warming potentials.
_______ makes HFO refrigerants less flammable than HC refrigerants. Answer:
Flourine
Which refrigerant contains chlorine? Answer: R-12
HFO refrigerants are miscible in _______ lubricants. Answer: POE lubricants
An example of HcFC refrigerant is: ______ Answer: R-123
What is being done in the U.S. to stop damage to the stratospheric ozone layer?
Answer: Eliminating the use of CFCs and HCFCs refrigerants
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, EPA regulations require appliances to have _________. Answer: a service aperture
or process hub
The release of any CFC, HCFC, or HFC refrigerant during _________ is illegal.
Answer: theft of equipment
____________ is the only EPA SNAP approved "drop in" replacement for
R-22. Answer: There are no direct drop-in refrigerant substitutes
Ester-based oils like POE can be mixed with ________. Answer: no other oils
What provides the cooling in a vapor compression refrigeration system? Answer:
The vaporization of the liquid refrigerant
An oil sample might be taken when __________. Answer: a. moisture and/or acid
problems are suspected
b. oil sludge formation or oil waxing is suspected
c. residual acidic oil from a burn-out is suspected of contaminating the replacement
oil
________ returns refrigerant to new product specifications and requires chemical
analysis to verify the purity to AHRI-700 standards. Answer: reclaiming
The EPA considers _________ the most effective for locating the general area of a
small leak. Answer: electronic or ultrasonic tester
Low ambient temperatures __________ recovery time. Answer: increase
A system is considered dehydrated when _________. Answer: a micron gauge
shows you have reached and held a vacuum of 500 microns or less with the vacuum
pump isolated from the system
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
