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Free Practice Quiz Question List

3 Refrigerant Recovery Procedures Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Refrigerant Recovery Procedures, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: A recovery unit that is not designed to handle liquid refrigerant should be protected from liquid entering it.

  1. A

    True

  2. B

    False

02
Fill in the blank
1 point

Keep a recovery cylinder upright, secured, and away from .

03
Choose one
1 point

For an applicable stationary appliance, which recovery equipment must a Section 608 technician use?

  1. A

    Any recovery unit that fits the appliance connections

  2. B

    Certified recovery equipment for applicable stationary appliances

  3. C

    A unit intended only for evacuation of hoses

  4. D

    A recovery unit selected without regard to the refrigerant

04
Choose one
1 point

A technician is selecting a cylinder for a refrigerant recovery job. Which cylinder is appropriate?

  1. A

    Any cylinder that can be placed on a scale

  2. B

    A cylinder approved for a different refrigerant but with a higher pressure rating

  3. C

    A designated recovery cylinder compatible with the refrigerant and rated for its pressure

  4. D

    A cylinder chosen solely by its size

05
True or false
1 point

True or false: A push-pull method may be used only when the system layout and equipment permit it, with the valve arrangement specified by the manufacturer.

  1. A

    True

  2. B

    False

06
Choose one
1 point

When preparing a chiller for evacuation, which approach best reduces the risk of freezing its tubes?

  1. A

    Follow the manufacturer's water-side instructions and circulate or remove water during evacuation as appropriate

  2. B

    Always leave the water side unchanged throughout evacuation

  3. C

    Drain the water side in every case, regardless of the manufacturer's instructions

  4. D

    Ignore the water side because refrigerant recovery cannot affect chiller tubes

07
Fill in the blank
1 point

Keep different refrigerants and the cylinder contents.

08
Choose one
1 point

When recovering refrigerant from a low-pressure chiller, what must be true of the recovery device's high-pressure cut-out and other controls?

  1. A

    Use controls intended for high-pressure service without checking their suitability

  2. B

    Ensure the high-pressure cut-out and other controls are suitable for low-pressure service

  3. C

    Disable the high-pressure cut-out during recovery

  4. D

    Choose controls based only on the cylinder's weight

09
Written response
1 point

What liquid fill level does the EPA recovery-equipment test procedure use, expressed as a percentage?

10
Choose one
1 point

Why is liquid recovery generally the faster first step when the equipment and setup allow it?

  1. A

    The liquid contains much more refrigerant by mass than the same volume of vapor

  2. B

    Vapor recovery is always faster because vapor occupies more volume

  3. C

    Liquid recovery is faster only because it requires no recovery unit

  4. D

    The two phases contain equal refrigerant mass in the same volume

11
Choose all
1 point

Select all appropriate actions when preparing a low-pressure chiller for refrigerant recovery.

  1. A

    Identify the refrigerant and appliance charge using the nameplate and service records

  2. B

    Mix refrigerants if that makes the recovery setup faster

  3. C

    Shut down and isolate the appliance as required

  4. D

    Follow manufacturer instructions for managing the water side during evacuation

12
Choose all
1 point

Select all appropriate actions when completing refrigerant recovery.

  1. A

    Close the valves before disconnecting

  2. B

    Disconnect using the approved procedure

  3. C

    Leave the cylinder contents undocumented if its weight was monitored

  4. D

    Record the recovered refrigerant and cylinder weight, then arrange reuse, reclamation, or disposal as required

13
Open ended
1 point

After reaching the applicable evacuation level, a technician isolates a low-pressure appliance and observes that its pressure rises after a few minutes. What may this indicate, and what should the technician do?

14
Choose one
1 point

Before connecting a recovery cylinder to an appliance whose refrigerant is not yet confirmed, what should the technician do?

  1. A

    Choose a cylinder based only on whether it is empty, then identify the refrigerant after recovery.

  2. B

    Identify the refrigerant using the nameplate and service records, and select a compatible cylinder rated for it.

  3. C

    Use any pressure-rated cylinder because refrigerants can be separated after they are mixed.

  4. D

    Select a cylinder based on the appliance size, without checking its refrigerant compatibility.

15
Choose one
1 point

A technician is preparing a low-pressure chiller for evacuation. Which water-side approach is appropriate?

  1. A

    Always drain the water side before evacuation, regardless of the manufacturer’s instructions.

  2. B

    Leave the water side unchanged because refrigerant recovery cannot affect chiller tubes.

  3. C

    Follow the manufacturer’s water-side instructions, circulating or removing water during evacuation as appropriate to reduce freezing risk.

  4. D

    Run the water side only after evacuation is complete.

16
Choose one
1 point

A system contains both bulk liquid refrigerant and vapor. Why is liquid generally recovered first?

  1. A

    Liquid contains much more refrigerant by mass than the same volume of vapor, so recovering bulk liquid first is generally faster.

  2. B

    Vapor contains more refrigerant by mass than the same volume of liquid, so it should always be recovered first.

  3. C

    Liquid and vapor contain the same refrigerant mass at equal volume, so recovery order does not matter.

  4. D

    Liquid recovery is faster only because it does not require monitoring the recovery unit.

17
True or false
1 point

True or false: The fact that a recovery unit’s hoses can connect to a low-pressure chiller guarantees that its high-pressure cut-out and other controls are suitable for low-pressure service.

  1. A

    True

  2. B

    False

18
Written response
1 point

What liquid fill level does the EPA recovery-equipment test procedure use for a recovery cylinder? Enter the percentage value.

19
Written response
1 point

What absolute pressure must be reached to meet the EPA evacuation level for a low-pressure appliance? Enter the value in mm Hg absolute.

20
Written response
1 point

While setting up a recovery circuit, a technician wants to limit refrigerant release from the hoses. What should the technician do to the hoses?