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Free Practice Quiz Question List

5 Refrigerant Practice and Review Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Refrigerant Practice and Review, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: An A1 refrigerant is harmless because it has no flame propagation under the classification test.

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which statement correctly distinguishes ozone-depletion potential (ODP) from global-warming potential (GWP)?

  1. A

    ODP compares climate impact with carbon dioxide, while GWP compares ozone depletion with CFC-11.

  2. B

    ODP compares ozone-depletion impact with CFC-11, while GWP compares climate impact with carbon dioxide over a specified time horizon.

  3. C

    ODP and GWP both measure ozone depletion, but use different time horizons.

  4. D

    ODP and GWP both measure climate impact, but use different reference substances.

03
Written response
1 point

Which substance is the reference for comparing ozone-depletion potential?

04
Fill in the blank
1 point

In an ASHRAE safety group, A indicates the , while 1 means .

05
Choose one
1 point

A technician identifies a cylinder as R-32. Which safety group is given for R-32 in the material?

  1. A

    A1

  2. B

    A2

  3. C

    A2L

  4. D

    B1

06
True or false
1 point

True or false: If a gauge reading corresponds to 40°F on an R-410A pressure–temperature chart, that alone proves the equipment is properly charged.

  1. A

    True

  2. B

    False

07
Written response
1 point

In the stated reference-chart example, what is the approximate R-410A saturation pressure at 40°F? Enter the value in psig.

08
Choose one
1 point

A unit nameplate specifies R-410A, but the available cylinder is clearly labeled R-32. What is the appropriate response?

  1. A

    Use the R-32 because it is used in similar equipment.

  2. B

    Compare the two refrigerants’ pressures and use whichever is closer to the chart value.

  3. C

    Combine a small amount of R-32 with the R-410A already specified by the nameplate.

  4. D

    Stop and obtain the specified refrigerant and an approved procedure.

09
Choose all
1 point

Which items should a technician verify from labels or manufacturer documentation before deciding whether a refrigerant is suitable for a unit? Select all correct choices.

  1. A

    The exact refrigerant designation, including any suffix.

  2. B

    The safety classification and warnings.

  3. C

    The cylinder color as the sole means of identifying the refrigerant.

  4. D

    The equipment’s specified refrigerant and factory charge.

  5. E

    The manufacturer-specified pressure and operating limits for the equipment and components.

10
Fill in the blank
1 point

For a refrigerant blend with bubble-point and dew-point values, use the point specified for the calculation by the .

11
Choose all
1 point

Which statements about EPA Section 608 requirements are supported by the material? Select all correct choices.

  1. A

    Intentional venting of covered refrigerants is prohibited.

  2. B

    Anyone may connect gauges to covered stationary equipment without certification.

  3. C

    Certification is required for covered activities that include adding or removing refrigerant.

  4. D

    An apprentice may qualify for an exemption only while closely and continually supervised by a certified technician.

12
Open ended
1 point

A refrigerant leak is suspected in a poorly ventilated confined area, and someone nearby reports symptoms. What should a worker do, and what should the worker avoid doing?

13
Choose one
1 point

Before using a pressure–temperature chart to interpret a system reading, which approach is appropriate?

  1. A

    Treat its pressure values as equipment limits if the refrigerant is correct.

  2. B

    Select the chart for the exact refrigerant and check whether it reports psig or psia.

  3. C

    Use a chart for a refrigerant with similar pressure if the exact chart is unavailable.

  4. D

    Assume its values are running pressures whenever the system reaches saturation.

14
Choose one
1 point

During service, a reading approaches the stated limit of a system component. What is the appropriate next step?

  1. A

    Continue operating while taking additional readings.

  2. B

    Compare the reading with a chart for a refrigerant with similar pressure.

  3. C

    Stop and consult qualified procedures or supervision.

  4. D

    Reduce the refrigerant charge based only on the chart value.

15
Choose one
1 point

A refrigerant container’s label is missing, and its identity cannot be confirmed from the job documentation. What should you do?

  1. A

    Use the refrigerant that is most commonly used for this type of unit.

  2. B

    Stop; do not guess or combine the contents, and seek clarification about the refrigerant identity and approved procedure.

  3. C

    Mix a small amount with the refrigerant already in the system to identify it.

  4. D

    Rely on the cylinder color and proceed if it appears familiar.

16
Choose one
1 point

A blend’s P–T chart lists both bubble-point and dew-point values. Which value should you use for a particular calculation?

  1. A

    Always use the bubble point because blends have a temperature range.

  2. B

    Always use the dew point because it is the higher-temperature value.

  3. C

    Use the point specified for that calculation by the manufacturer or service procedure.

  4. D

    Average the bubble-point and dew-point values for every calculation.

17
Choose one
1 point

A refrigerant has zero ozone-depletion potential. Which conclusion about its global-warming potential is justified?

  1. A

    Zero ODP means the refrigerant also has zero GWP.

  2. B

    Zero ODP does not establish that the refrigerant has low GWP.

  3. C

    ODP and GWP are two names for the same environmental measure.

  4. D

    GWP compares ozone depletion with the impact of CFC-11.

18
True or false
1 point

An apprentice may qualify for an exemption from certification for covered service activities only while closely and continually supervised by a certified technician.

  1. A

    True

  2. B

    False

19
Written response
1 point

According to the cited Arkema reference chart, what pressure value is listed for R-134a at a saturation temperature of 40°F? Enter the value in psig.

20
Written response
1 point

What document should you consult for detailed safety information about a refrigerant when needed?