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Free EPA608 Practice Questions

10 free, exam-style Pass Your HVAC Certification First Try (EPA608) practice questions with answers and explanations. No signup required. Work through them below, then take the full free EPA608 practice test to study every exam domain.

Question 1

What is stratospheric ozone?

  1. Ground-level pollution found in smog
  2. A form of oxygen (O3) located 6-30 miles above Earth that absorbs UV radiation
  3. A greenhouse gas causing global warming
  4. A chemical used in refrigeration systems
Show answer & explanation

Correct answer: B - A form of oxygen (O3) located 6-30 miles above Earth that absorbs UV radiation

Question 2

What does ODP stand for?

  1. Ozone Destruction Process
  2. Oxygen Depletion Potential
  3. Ozone Depletion Potential
  4. Oxidation Distribution Pattern
Show answer & explanation

Correct answer: C - Ozone Depletion Potential

Question 3

What is the Montreal Protocol?

  1. A US federal law regulating refrigerants
  2. An international treaty to phase out ozone-depleting substances
  3. A service procedure for HVAC equipment
  4. A refrigerant testing standard
Show answer & explanation

Correct answer: B - An international treaty to phase out ozone-depleting substances

Question 4

Which statement correctly describes the chlorine destruction cycle?

  1. Chlorine bonds permanently with oxygen after one reaction
  2. Each chlorine atom can destroy approximately 100,000 ozone molecules
  3. Chlorine only destroys ozone in the presence of sunlight at ground level
  4. Chlorine combines with hydrogen to neutralize its effects
Show answer & explanation

Correct answer: B - Each chlorine atom can destroy approximately 100,000 ozone molecules

Question 5

What defines a substance as an ozone-depleting substance (ODS)?

  1. High molecular weight and low boiling point
  2. Presence of chlorine or bromine atoms that can reach the stratosphere
  3. High global warming potential
  4. Flammability classification
Show answer & explanation

Correct answer: B - Presence of chlorine or bromine atoms that can reach the stratosphere

Question 6

The Antarctic ozone hole is best described as:

  1. A permanent gap in the ozone layer
  2. A seasonal thinning of stratospheric ozone occurring in Antarctic spring
  3. A hole in the atmosphere allowing UV radiation
  4. Ground-level ozone depletion near the South Pole
Show answer & explanation

Correct answer: B - A seasonal thinning of stratospheric ozone occurring in Antarctic spring

Question 7

Polar stratospheric clouds contribute to ozone depletion by:

  1. Absorbing ozone molecules directly
  2. Providing surfaces for chemical reactions that release active chlorine
  3. Blocking sunlight needed for ozone formation
  4. Transporting CFCs from lower latitudes
Show answer & explanation

Correct answer: B - Providing surfaces for chemical reactions that release active chlorine

Question 8

In what year was the Montreal Protocol signed?

  1. 1985
  2. 1987
  3. 1990
  4. 1992
Show answer & explanation

Correct answer: B - 1987

Question 9

Which organization coordinates implementation of the Montreal Protocol internationally?

  1. EPA
  2. United Nations Environment Programme
  3. World Health Organization
  4. International Standards Organization
Show answer & explanation

Correct answer: B - United Nations Environment Programme

Question 10

Under the Montreal Protocol, developed countries were required to phase out CFC production by:

  1. December 31, 1995
  2. January 1, 2000
  3. January 1, 2010
  4. December 31, 2015
Show answer & explanation

Correct answer: A - December 31, 1995

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