Refrigerant Handling Certification
Exam – 2026 Edition|||questions and
answers with rationales/graded
A+/2026 update/100% correct /instant
download
Total Questions: 85
Format: Multiple Choice
Instructions: Select the single best answer. Correct answers are highlighted in
bold with a rationale.
Section 1: Ozone Depletion & Global Warming (Questions 1–15)
1. The ozone layer protects Earth by absorbing most of the sun’s:
• A) Infrared radiation
• B) Ultraviolet (UV) radiation – *Rationale: UV-B causes skin cancer and
ecosystem damage; ozone absorbs 97–99% of it.*
• C) Visible light
• D) Gamma rays
2. Which refrigerant has the highest Ozone Depletion Potential (ODP)?
• A) R-134a
• B) R-12 – *Rationale: R-12 (CFC) has ODP = 1.0. HFCs have 0 ODP.*
• C) R-410A
• D) R-32
3. Global Warming Potential (GWP) is measured relative to:
• A) Oxygen
, • B) Carbon dioxide (CO₂) – Rationale: CO₂ has GWP of 1. All others are
multiples.
• C) Methane
• D) Nitrogen
4. Under the AIM Act of 2020 (USA), the phasedown of HFCs targets a reduction
to ___ of baseline by 2036.
• A) 50%
• B) 30%
• C) 15% – Rationale: The American Innovation and Manufacturing (AIM)
Act mandates 85% reduction from baseline by 2036.
• D) 0%
5. Which refrigerant class has zero ODP but very high GWP (e.g., 1,430)?
• A) CFCs
• B) HCFCs
• C) HFCs – *Rationale: HFCs like R-134a have zero ODP but GWP
~1,430.*
• D) HFOs
6. The Montreal Protocol (1987) originally targeted phasing out:
• A) HFCs
• B) CFCs – Rationale: CFCs were the first class identified for ozone
depletion.
• C) HFOs
• D) Ammonia
7. The Kigali Amendment (2016) to the Montreal Protocol addresses:
• A) CO₂ emissions
• B) HFC phasedown – Rationale: Kigali adds HFCs due to high GWP.
• C) CFC disposal
, • D) A2L safety
8. R-22 is classified as an:
• A) CFC
• B) HCFC – *Rationale: R-22 contains chlorine, hydrogen, fluorine, carbon
– hydrochlorofluorocarbon.*
• C) HFC
• D) Natural refrigerant
9. The ozone depletion process is most accelerated by chlorine atoms in the:
• A) Troposphere
• B) Stratosphere – Rationale: The stratospheric ozone layer is where UV
breaks CFCs releasing Cl.
• C) Mesosphere
• D) Ionosphere
10. What is the GWP of R-410A (approx.)?
• A) 675
• B) 2,088 – *Rationale: R-410A is a 50/50 blend of R-32 and R-125; GWP
~2,088.*
• C) 3,920
• D) 1
11. Which natural refrigerant has GWP = 1 and ODP = 0?
• A) R-134a
• B) R-744 (CO₂) – *Rationale: CO₂ is natural, GWP=1, ODP=0.*
• C) R-404A
• D) R-1234yf
12. The “phaseout” of R-22 in new equipment in the USA was completed in:
• A) 2010
Exam – 2026 Edition|||questions and
answers with rationales/graded
A+/2026 update/100% correct /instant
download
Total Questions: 85
Format: Multiple Choice
Instructions: Select the single best answer. Correct answers are highlighted in
bold with a rationale.
Section 1: Ozone Depletion & Global Warming (Questions 1–15)
1. The ozone layer protects Earth by absorbing most of the sun’s:
• A) Infrared radiation
• B) Ultraviolet (UV) radiation – *Rationale: UV-B causes skin cancer and
ecosystem damage; ozone absorbs 97–99% of it.*
• C) Visible light
• D) Gamma rays
2. Which refrigerant has the highest Ozone Depletion Potential (ODP)?
• A) R-134a
• B) R-12 – *Rationale: R-12 (CFC) has ODP = 1.0. HFCs have 0 ODP.*
• C) R-410A
• D) R-32
3. Global Warming Potential (GWP) is measured relative to:
• A) Oxygen
, • B) Carbon dioxide (CO₂) – Rationale: CO₂ has GWP of 1. All others are
multiples.
• C) Methane
• D) Nitrogen
4. Under the AIM Act of 2020 (USA), the phasedown of HFCs targets a reduction
to ___ of baseline by 2036.
• A) 50%
• B) 30%
• C) 15% – Rationale: The American Innovation and Manufacturing (AIM)
Act mandates 85% reduction from baseline by 2036.
• D) 0%
5. Which refrigerant class has zero ODP but very high GWP (e.g., 1,430)?
• A) CFCs
• B) HCFCs
• C) HFCs – *Rationale: HFCs like R-134a have zero ODP but GWP
~1,430.*
• D) HFOs
6. The Montreal Protocol (1987) originally targeted phasing out:
• A) HFCs
• B) CFCs – Rationale: CFCs were the first class identified for ozone
depletion.
• C) HFOs
• D) Ammonia
7. The Kigali Amendment (2016) to the Montreal Protocol addresses:
• A) CO₂ emissions
• B) HFC phasedown – Rationale: Kigali adds HFCs due to high GWP.
• C) CFC disposal
, • D) A2L safety
8. R-22 is classified as an:
• A) CFC
• B) HCFC – *Rationale: R-22 contains chlorine, hydrogen, fluorine, carbon
– hydrochlorofluorocarbon.*
• C) HFC
• D) Natural refrigerant
9. The ozone depletion process is most accelerated by chlorine atoms in the:
• A) Troposphere
• B) Stratosphere – Rationale: The stratospheric ozone layer is where UV
breaks CFCs releasing Cl.
• C) Mesosphere
• D) Ionosphere
10. What is the GWP of R-410A (approx.)?
• A) 675
• B) 2,088 – *Rationale: R-410A is a 50/50 blend of R-32 and R-125; GWP
~2,088.*
• C) 3,920
• D) 1
11. Which natural refrigerant has GWP = 1 and ODP = 0?
• A) R-134a
• B) R-744 (CO₂) – *Rationale: CO₂ is natural, GWP=1, ODP=0.*
• C) R-404A
• D) R-1234yf
12. The “phaseout” of R-22 in new equipment in the USA was completed in:
• A) 2010
