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Free Practice Quiz Question List

3 Refrigerant Fundamentals and Practices Online Quiz Questions

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

20 questions
01
Choose one
1 point

A technician checks a refrigerant P–T chart to interpret a measured system pressure. Which conclusion is justified by the chart alone?

  1. A

    It determines the system charge directly.

  2. B

    It provides saturation relationships but does not, by itself, reveal system charge or diagnose a fault.

  3. C

    It gives the temperature of every pipe in the appliance.

02
Choose one
1 point

Which statement correctly distinguishes gauge pressure from absolute pressure?

  1. A

    Both are measured from a perfect vacuum.

  2. B

    Gauge pressure is measured from a perfect vacuum, while absolute pressure is measured relative to atmospheric pressure.

  3. C

    Gauge pressure is measured relative to atmospheric pressure, while absolute pressure is measured from a perfect vacuum.

03
Choose one
1 point

A technician removes refrigerant from an appliance and stores it in an external container without testing or cleaning it. Which refrigerant-handling term describes this action?

  1. A

    Recover

  2. B

    Recycle

  3. C

    Reclaim

04
Choose all
1 point

Select all statements that correctly distinguish recycling from reclamation of refrigerant.

  1. A

    Recycling generally prepares recovered refrigerant for reuse without meeting reclamation specifications.

  2. B

    Reclamation includes reprocessing to applicable purity specifications and verification by prescribed analysis.

  3. C

    Recycling and reclamation both require verification to the same purity specifications.

05
Choose all
1 point

A technician is preparing to recover refrigerant. Select all practices supported by the material.

  1. A

    Use recovery equipment suited to the refrigerant and appliance.

  2. B

    Mix refrigerants in one cylinder to simplify storage.

  3. C

    Use an approved, correctly identified recovery cylinder and monitor its contents with a scale.

  4. D

    Fill a cylinder beyond its rated limit if recovery is not complete.

06
True or false
1 point

True or false: Recovery evacuation before opening equipment and system evacuation after repair are separate procedures with different goals.

  1. A

    True

  2. B

    False

07
True or false
1 point

True or false: An ordinary manifold gauge can reliably confirm that a system has reached a deep vacuum.

  1. A

    True

  2. B

    False

08
Written response
1 point

For a zeotropic blend, which saturation point should a technician use for superheat calculations?

09
Written response
1 point

Near sea level, approximately how many psi must be added to gauge pressure to estimate absolute pressure?

10
Open ended
1 point

A repaired refrigeration circuit is ready for service. Explain how recovery evacuation before opening the equipment differs from system evacuation after repair, including the purpose of each procedure.

11
Choose one
1 point

For equipment manufactured after November 15, 1993, what evacuation level applies to a medium-pressure appliance containing 200 lb or more of refrigerant?

  1. A

    10 in. Hg vacuum

  2. B

    15 in. Hg vacuum

  3. C

    25 mm Hg absolute

12
Choose one
1 point

In the listed EPA evacuation levels for equipment manufactured after November 15, 1993, which level applies to a low-pressure appliance?

  1. A

    0 in. Hg vacuum

  2. B

    15 in. Hg vacuum

  3. C

    25 mm Hg absolute

13
True or false
1 point

True or false: Recovery evacuation before opening an appliance and system evacuation after repair are separate procedures with different goals.

  1. A

    True

  2. B

    False

14
Choose one
1 point

In a two-phase system, a refrigerant’s measured pressure corresponds to a saturation temperature of 40°F on its P–T chart. What does this indicate?

  1. A

    The temperature of the pipe wherever the pressure is measured

  2. B

    The refrigerant’s saturation temperature where liquid and vapor are in equilibrium

  3. C

    The average temperature of the entire appliance

  4. D

    The refrigerant’s superheated-vapor temperature regardless of its state

15
Choose one
1 point

A technician needs to estimate absolute pressure near sea level from a gauge-pressure reading. Which relationship should the technician use?

  1. A

    psia is approximately psig minus 14.7 psi near sea level

  2. B

    psia and psig are equal near sea level

  3. C

    psia is approximately psig plus 14.7 psi near sea level

  4. D

    psia is always 14.7 psi, regardless of the measured psig

16
Written response
1 point

For a zeotropic refrigerant blend, which saturation-point value should a technician use to calculate superheat?

17
Choose one
1 point

A technician cleans recovered refrigerant for reuse in equipment belonging to the same owner, but does not process it to reclamation specifications. Which handling process is this?

  1. A

    Recycle

  2. B

    Recover

  3. C

    Reclaim

  4. D

    Release

18
Written response
1 point

For a small appliance containing 5 pounds or less of refrigerant, what percentage must generally be recovered when the compressor operates and qualifying recovery equipment manufactured after November 15, 1993, is used?

19
Fill in the blank
1 point

For an appliance containing more than 5 lb of refrigerant, the applicable recovery equipment was manufactured after November 15, 1993, and the appliance is high-pressure with a 180 lb charge. The required evacuation level is .

20
Fill in the blank
1 point

For an appliance containing more than 5 lb of refrigerant, the applicable recovery equipment was manufactured after November 15, 1993, and the appliance is high-pressure with a 200 lb charge. The required evacuation level is .