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EPA Section 608 — Core

Ozone depletion and environment: practice questions

Our EPA 608 Core bank has 12 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1

What does the ozone layer in the stratosphere protect the Earth from?

  1. Acid rain
  2. Infrared heat radiated from the sun and the land
  3. Volcanic ash
  4. Harmful ultraviolet (UV-B) radiation
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D. Harmful ultraviolet (UV-B) radiation — Stratospheric ozone absorbs most of the sun's UV-B radiation.

Question 2

Which international agreement controls the production of ozone-depleting substances?

  1. The Paris Agreement
  2. The Geneva Convention
  3. The Kyoto Protocol
  4. The Montreal Protocol
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D. The Montreal Protocol — The Montreal Protocol was agreed in 1987.

Question 3

What is the ozone depletion potential (ODP) of HFC refrigerants?

  1. Higher than CFCs
  2. The same as HCFCs
  3. It depends on the cylinder size
  4. Zero
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D. Zero — HFCs contain no chlorine, but many have a high global warming potential.

Question 4

Why are HFC refrigerants being phased down?

  1. Many have a high global warming potential
  2. They destroy ozone faster than CFCs
  3. They are toxic to breathe at any concentration indoors
  4. They are not compatible with any oil
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A. Many have a high global warming potential — The AIM Act of 2020 directs a phasedown of HFC production and consumption.

Question 5

Which refrigerant type contains hydrogen, chlorine, fluorine and carbon?

  1. CFC-12
  2. HFO
  3. CFC
  4. HCFC
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D. HCFC — The hydrogen makes HCFCs less stable in the lower atmosphere, so they have a lower ODP than CFCs.

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