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Free Practice Quiz Question List

1 Refrigerant Types and Properties Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Refrigerant Types and Properties, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: HFCs have zero ozone-depletion potential, so they necessarily have low global-warming potential.

  1. A

    True

  2. B

    False

02
Choose one
1 point

A refrigerant is classified A2L. Which interpretation of that safety group is correct?

  1. A

    Higher toxicity and mild flammability

  2. B

    Lower toxicity and mild flammability

  3. C

    Lower toxicity and no flame propagation in the standard test

  4. D

    Lower toxicity and high flammability

03
Fill in the blank
1 point

R-22 belongs to the family, whose refrigerants are ozone-depleting but generally less so than CFCs.

04
Written response
1 point

What 100-year global-warming-potential value is listed for R-410A under the cited EPA values?

05
Choose one
1 point

Which refrigerant is widely used in newer vehicle air-conditioning systems?

  1. A

    R-12

  2. B

    R-404A

  3. C

    R-1234yf

  4. D

    R-717

06
Written response
1 point

What refrigerant designation is used for carbon dioxide in commercial and industrial refrigeration systems?

07
Fill in the blank
1 point

During service, technicians should refrigerant into an appropriate cylinder rather than release it.

08
Choose all
1 point

Select all characteristics that apply to hydrocarbon refrigerants such as R-600a and R-290.

  1. A

    They have very low global-warming potential.

  2. B

    They are nonflammable under the standard test.

  3. C

    They have zero ozone-depletion potential.

  4. D

    They are highly flammable and classified A3.

09
True or false
1 point

True or false: Once a refrigerant's family is known, its pressure can be treated as a fixed value regardless of temperature and condition.

  1. A

    True

  2. B

    False

10
Choose one
1 point

A technician arrives to service equipment with an unfamiliar refrigerant charge. What should the technician do before connecting gauges or recovery equipment?

  1. A

    Infer the refrigerant from the equipment's age and connect gauges.

  2. B

    Identify the refrigerant from the equipment label before connecting gauges.

  3. C

    Choose a refrigerant from the same family and use its pressure chart.

  4. D

    Connect recovery equipment first and identify the refrigerant afterward.

11
Choose all
1 point

A technician must service equipment containing a flammable refrigerant. Select all appropriate precautions.

  1. A

    Use equipment rated for the refrigerant and its pressures.

  2. B

    Ventilate the work area.

  3. C

    Assume ignition sources need no special control if the refrigerant has low GWP.

  4. D

    Control ignition sources.

12
Choose one
1 point

Ammonia is classified B2L. Which interpretation best explains why its safety controls must address more than flammability?

  1. A

    Lower toxicity and mild flammability

  2. B

    Higher toxicity and high flammability

  3. C

    Higher toxicity and mild flammability

  4. D

    Lower toxicity and no flame propagation in the standard test

13
Open ended
1 point

An equipment owner wants to choose a refrigerant based only on its global-warming potential. Explain why that is not enough to determine whether the refrigerant is suitable and what else can affect its actual environmental impact.

14
Choose one
1 point

Which refrigerant is widely used in newer vehicle air-conditioning systems?

  1. A

    R-12

  2. B

    R-1234yf

  3. C

    R-404A

  4. D

    R-717

15
Choose one
1 point

R-1234yf is classified A2L. What does this classification indicate?

  1. A

    Higher toxicity and mild flammability

  2. B

    Lower toxicity and no flame propagation in the standard test

  3. C

    Lower toxicity and mild flammability

  4. D

    Lower toxicity and high flammability

16
Choose one
1 point

A technician needs to assess pressure for a refrigerant in a particular system. Which approach is appropriate?

  1. A

    Check the equipment nameplate and manufacturer service data, using the correct pressure–temperature chart.

  2. B

    Estimate pressure from the refrigerant family and compare it with a conventional AC system.

  3. C

    Use a pressure value from another refrigerant in the same family.

  4. D

    Select a safe operating pressure from the refrigerant designation alone.

17
Choose one
1 point

A replacement refrigerant is being considered for a system. Which choice best accounts for equipment compatibility?

  1. A

    Choose whichever refrigerant has the lowest GWP, regardless of the equipment specification.

  2. B

    Substitute a refrigerant with a similar safety classification.

  3. C

    Use any refrigerant in the same family as the specified refrigerant.

  4. D

    Use only the refrigerant specified for the equipment.

18
True or false
1 point

During service, intentionally releasing refrigerant into the air is prohibited for ozone-depleting refrigerants and most substitutes.

  1. A

    True

  2. B

    False

19
Written response
1 point

Enter the ASHRAE safety group code for a refrigerant classified as higher toxicity and mild flammability.

20
Written response
1 point

What is the listed 100-year GWP of R-404A under the cited EPA values?