EPA 608 Certification Exam 2026/2027
COMPLETE QUESTIONS WITH CORRECT
DETAILED ANSWERS || GUARANTEED
PASS
1. Ozone stratosphere above the earth consists of molecules containing... -
ANSWER ✅ 3 oxygen atoms (O3)
2. The oxygen we breathe contains how many atoms in each molecule? -
ANSWER ✅ two atoms (O2)
3. The ozone layer consists of ozone in the stratosphere at an altitude of
between __________above the earth - ANSWER ✅ 7 and 28 miles
4. the ozone layer is formed by what? - ANSWER ✅ Ultra violet light from
the sun acting on oxygen molecules,absorbs and scatter UV light from the
sun
5. What does the Ozone layer do? - ANSWER ✅ prevents harmful amounts of
UV light from reaching Earth.
6. What is another name for the ozone layer? - ANSWER ✅ ozone shield
7. Ozone in the lower atmosphere where we breathe is caused by what? -
ANSWER ✅ UV radiation from the sun acting on smog and air pollutants
,8. Ozone at ground level is what? - ANSWER ✅ Harmful pollutant
9. Ozone in the stratosphere is what? - ANSWER ✅ Protective Shield
10.The ability of a substance to destroy ozone in the stratosphere is referred to
as the what? - ANSWER ✅ Ozone depletion potential (ODP)
11.The production or import of what type of ___________ in the US to service
existing systems is banned beginning in 2020 - ANSWER ✅ R-22
12.When a refrigerant is phased out, supplies of that refrigerant can only come
from what? - ANSWER ✅ recovered and reclaimed refrigerant
13.True or false : It is legal to convert a R407C system to R-22 - ANSWER ✅
false
14.A binary blend is: - ANSWER ✅ a two part fixture
15.a ternary blend - ANSWER ✅ is a three part mixture
16.Temperature glide refers to: - ANSWER ✅ A range of condensing and
evaporating temperatures for one pressure
17.All non-azeotropic refrigerants have what nomenclature? - ANSWER ✅ (R-
4XX)
, 18.non azeotropic refrigerants are charged as a liquid or vapor? - ANSWER ✅
liquid
19.Why are non-azeotropic refrigerants charged as liquid? - ANSWER ✅
because they vaporize at uneven rates due to different vapor pressures
(fractionation)
20.R410A is charged as a liquid or vapor? - ANSWER ✅ it can be charged as
both liquid and vapor because the temperature glide and fractionization are
minimal
21.Azeotropic refrigerants have what nomenclature? - ANSWER ✅ (R-5XX)
22.Azeotropic refrigerants can be charged as liquid or vapor - ANSWER ✅
they can be charged as both liquid and vapor
23.All recovery and recycling equipment must meet _____ - ANSWER ✅ EPA
Standards
24.all recovery and recycling equipment must have am ___________________
- ANSWER ✅ EPA approved certification label attached
25.Self contained recovery devices do not require what in order to operate? -
ANSWER ✅ the compressor or any other component
COMPLETE QUESTIONS WITH CORRECT
DETAILED ANSWERS || GUARANTEED
PASS
1. Ozone stratosphere above the earth consists of molecules containing... -
ANSWER ✅ 3 oxygen atoms (O3)
2. The oxygen we breathe contains how many atoms in each molecule? -
ANSWER ✅ two atoms (O2)
3. The ozone layer consists of ozone in the stratosphere at an altitude of
between __________above the earth - ANSWER ✅ 7 and 28 miles
4. the ozone layer is formed by what? - ANSWER ✅ Ultra violet light from
the sun acting on oxygen molecules,absorbs and scatter UV light from the
sun
5. What does the Ozone layer do? - ANSWER ✅ prevents harmful amounts of
UV light from reaching Earth.
6. What is another name for the ozone layer? - ANSWER ✅ ozone shield
7. Ozone in the lower atmosphere where we breathe is caused by what? -
ANSWER ✅ UV radiation from the sun acting on smog and air pollutants
,8. Ozone at ground level is what? - ANSWER ✅ Harmful pollutant
9. Ozone in the stratosphere is what? - ANSWER ✅ Protective Shield
10.The ability of a substance to destroy ozone in the stratosphere is referred to
as the what? - ANSWER ✅ Ozone depletion potential (ODP)
11.The production or import of what type of ___________ in the US to service
existing systems is banned beginning in 2020 - ANSWER ✅ R-22
12.When a refrigerant is phased out, supplies of that refrigerant can only come
from what? - ANSWER ✅ recovered and reclaimed refrigerant
13.True or false : It is legal to convert a R407C system to R-22 - ANSWER ✅
false
14.A binary blend is: - ANSWER ✅ a two part fixture
15.a ternary blend - ANSWER ✅ is a three part mixture
16.Temperature glide refers to: - ANSWER ✅ A range of condensing and
evaporating temperatures for one pressure
17.All non-azeotropic refrigerants have what nomenclature? - ANSWER ✅ (R-
4XX)
, 18.non azeotropic refrigerants are charged as a liquid or vapor? - ANSWER ✅
liquid
19.Why are non-azeotropic refrigerants charged as liquid? - ANSWER ✅
because they vaporize at uneven rates due to different vapor pressures
(fractionation)
20.R410A is charged as a liquid or vapor? - ANSWER ✅ it can be charged as
both liquid and vapor because the temperature glide and fractionization are
minimal
21.Azeotropic refrigerants have what nomenclature? - ANSWER ✅ (R-5XX)
22.Azeotropic refrigerants can be charged as liquid or vapor - ANSWER ✅
they can be charged as both liquid and vapor
23.All recovery and recycling equipment must meet _____ - ANSWER ✅ EPA
Standards
24.all recovery and recycling equipment must have am ___________________
- ANSWER ✅ EPA approved certification label attached
25.Self contained recovery devices do not require what in order to operate? -
ANSWER ✅ the compressor or any other component
