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2 Ozone, Refrigerants, and Environmental Impact Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Ozone, Refrigerants, and Environmental Impact, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: An HFC’s zero ozone-depletion potential does not establish that it has zero climate impact.

  1. A

    True

  2. B

    False

02
Choose one
1 point

A technician is comparing two environmental ratings for a refrigerant. Which statement correctly distinguishes ozone-depletion potential (ODP) from global-warming potential (GWP)?

  1. A

    ODP measures warming relative to carbon dioxide; GWP measures ozone depletion relative to CFC-11.

  2. B

    ODP compares ozone-depleting effect with CFC-11; GWP compares warming effect with carbon dioxide.

  3. C

    ODP measures refrigerant efficiency; GWP measures the amount of refrigerant released.

  4. D

    ODP and GWP both measure ozone depletion, but over different time periods.

03
Written response
1 point

A technician removes refrigerant from an appliance and stores it in an external container without cleaning it. What is this process called?

04
Fill in the blank
1 point

As a zeotropic blend boils or condenses at a given pressure, its temperature may change. This temperature difference is called .

05
Choose one
1 point

A facility still operates equipment designed for R-22. Which statement best describes the U.S. restriction that took effect on January 1, 2020?

  1. A

    All existing R-22 equipment had to be removed from service on January 1, 2020.

  2. B

    Existing R-22 equipment may operate, but servicing it is prohibited.

  3. C

    Production and import of new R-22 ended, while existing equipment may continue to operate and be serviced under applicable rules.

  4. D

    R-22 production and import continue without restriction until the remaining HCFC phaseout in 2030.

06
Written response
1 point

For 2024–2028, the U.S. HFC allowance cap is what percentage of the historical baseline? Enter the value in percent (percentage points); no tolerance is allowed.

07
Choose all
1 point

Lower stratospheric ozone allows more UV-B radiation to reach Earth’s surface. Select all effects identified as consequences of this increased exposure.

  1. A

    Increased risk of skin cancer and cataracts.

  2. B

    Reduced electricity use by cooling equipment.

  3. C

    Harm to plants and aquatic organisms.

  4. D

    Damage to some materials.

08
Choose all
1 point

A service company is comparing refrigerants for a system replacement. Select all factors that the material says should inform refrigerant selection.

  1. A

    Ozone impact.

  2. B

    Climate impact.

  3. C

    Whether the refrigerant is the cheapest option, regardless of other factors.

  4. D

    Energy efficiency, safety, and equipment compatibility.

09
Fill in the blank
1 point

A zeotropic blend leaks, and its components escape at different rates, shifting the composition of the refrigerant that remains. This effect is called .

10
Choose one
1 point

A refrigerant leak reduces system charge. The equipment then uses more electricity, leading to additional emissions from power generation. What kind of environmental effect does this illustrate?

  1. A

    A refrigerant leak directly traps heat in the atmosphere.

  2. B

    Lost charge contributes to inefficient operation, increasing electricity use and emissions from power generation.

  3. C

    Chlorine released from a refrigerant catalytically destroys ozone.

  4. D

    UV-B exposure increases risks to organisms and materials.

11
True or false
1 point

True or false: Because the remaining U.S. HCFC production and import phaseout is scheduled for 2030, every existing appliance containing an HCFC must be removed from service by that year.

  1. A

    True

  2. B

    False

12
Choose one
1 point

A technician is charging a system with a zeotropic blend. Which general practice helps preserve the blend’s composition, subject to the equipment manufacturer’s instructions?

  1. A

    Withdraw the zeotropic blend from the supply cylinder as liquid when charging, following the manufacturer’s instructions.

  2. B

    Withdraw the blend as vapor so that all components enter the system in equal proportions.

  3. C

    Mix the blend with another refrigerant to stabilize its composition before charging.

  4. D

    Assume the blend is a universal drop-in replacement and charge it directly into the compressor.

13
Open ended
1 point

Explain the difference between a direct and an indirect environmental effect of refrigerant leakage. Give one example of each based on the material.

14
True or false
1 point

True or false: HFOs are unsaturated refrigerants, and their environmental and safety properties depend on the specific refrigerant.

  1. A

    True

  2. B

    False

15
Choose one
1 point

Which statement correctly describes global-warming potential (GWP)?

  1. A

    It compares ozone depletion with that of CFC-11.

  2. B

    It compares the warming effect of a given mass of a greenhouse gas with the same mass of carbon dioxide over a specified time period.

  3. C

    It measures the amount of refrigerant needed to cool a system.

  4. D

    It measures how quickly a refrigerant changes from liquid to vapor.

16
Written response
1 point

On what date did U.S. production and import of new R-22 (HCFC-22) end?

17
Choose one
1 point

How can certain stable chlorine- or bromine-containing chemicals deplete stratospheric ozone?

  1. A

    They block all ultraviolet radiation before it reaches the stratosphere.

  2. B

    They absorb ozone and carry it down to Earth’s surface.

  3. C

    Ultraviolet light breaks them down, releasing atoms that catalytically destroy ozone.

  4. D

    They convert UV-B radiation into carbon dioxide.

18
Written response
1 point

Which refrigerant is assigned an ozone-depletion potential (ODP) of 1 and used as the reference for comparing ODP?

19
Choose one
1 point

After U.S. production and import of new R-22 ended, which statement describes the status of existing R-22 equipment?

  1. A

    All existing R-22 equipment had to be removed from service when production and import ended.

  2. B

    Existing R-22 equipment may continue to operate and be serviced using supplies allowed under applicable rules.

  3. C

    R-22 production and import were unrestricted as long as the refrigerant was used for servicing.

  4. D

    The phaseout applied only to the operation of existing equipment, not to production or import.

20
Choose one
1 point

A refrigerant leak reduces a system’s charge, making it less efficient and increasing its electricity use. Which environmental effect does the increased electricity use illustrate?

  1. A

    The released refrigerant directly absorbs ultraviolet-B radiation.

  2. B

    The equipment uses less electricity because it has lost refrigerant.

  3. C

    Lost charge makes the equipment less efficient, increasing energy use and emissions from electricity generation.

  4. D

    The refrigerant changes the ozone-depletion potential of carbon dioxide.