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Free Practice Quiz Question List

5 Universal Certification Practice and Review Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Universal Certification 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: EPA Section 608 certification credentials expire after a fixed number of years.

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which statement best describes the environmental effects of HFC refrigerants?

  1. A

    All HFCs deplete stratospheric ozone.

  2. B

    HFCs have zero ozone-depletion potential, but some have high global-warming potential.

  3. C

    HFCs cannot contribute to climate change.

  4. D

    All HFCs are direct replacements that require no equipment changes.

03
Fill in the blank
1 point

In the basic refrigeration cycle, the compressor raises refrigerant vapor's .

04
Choose all
1 point

Select all exam components included in EPA Section 608 Universal certification.

  1. A

    Core

  2. B

    Type I

  3. C

    Type II

  4. D

    Type III

  5. E

    Motor-vehicle air-conditioning

05
Choose one
1 point

A technician needs to pressure-test a refrigeration system. Which choice is appropriate?

  1. A

    Oxygen from an unregulated cylinder

  2. B

    Compressed air from a shop line

  3. C

    Regulated nitrogen with appropriate pressure protection

  4. D

    A mixture of air and refrigerant

06
Choose all
1 point

For a small appliance, select all conditions under which the minimum recovery level is 80 percent.

  1. A

    The appliance compressor is not functional.

  2. B

    Recovery equipment made before November 15, 1993 is used.

  3. C

    The compressor is functional and equipment made after November 15, 1993 is used.

  4. D

    The appliance is a small appliance regardless of compressor condition or equipment date.

07
Fill in the blank
1 point

When using a system-dependent recovery device on a small appliance with an inoperative compressor, install access on both the .

08
Written response
1 point

What evacuation level in mm Hg absolute applies to a low-pressure appliance in the EPA service-practice table? Enter the numeric value.

09
Written response
1 point

A post-1993 high-pressure appliance contains 250 pounds of refrigerant. What evacuation level, in inches of mercury vacuum, applies before opening it for service? Enter the numeric value.

10
True or false
1 point

True or false: Before removing oil from a stationary refrigeration appliance, its pressure must be reduced to no greater than 5 psig, unless the oil is drained into a receiver that is then brought to that pressure.

  1. A

    True

  2. B

    False

11
True or false
1 point

True or false: Refrigerant recovered by one owner and transferred to a different owner generally must be reclaimed by an EPA-certified reclaimer.

  1. A

    True

  2. B

    False

12
Choose one
1 point

A system contains 20 pounds of refrigerant. May a technician use system-dependent recovery equipment on it?

  1. A

    Yes, if the system has a functional compressor.

  2. B

    No; use suitable self-contained recovery equipment instead.

  3. C

    Yes, if the refrigerant is recovered into an approved cylinder.

  4. D

    No; system-dependent equipment is prohibited for all systems, regardless of charge.

13
Open ended
1 point

During recovery, a system reaches the required vacuum, but its pressure rises again after a short wait. What may be causing the rise, and what should the technician do next?

14
Choose one
1 point

During a refrigeration-cycle inspection, which function should you expect the metering device to perform?

  1. A

    Raise the pressure and temperature of refrigerant vapor.

  2. B

    Lower the refrigerant pressure before it enters the evaporator.

  3. C

    Reject heat from refrigerant vapor and condense it to liquid.

  4. D

    Absorb heat as refrigerant boils.

15
Choose one
1 point

A technician is comparing the environmental effects of HFC refrigerants. Which statement is accurate?

  1. A

    Their zero ozone-depletion potential means they cannot affect the climate.

  2. B

    They have zero ozone-depletion potential, but some have high global-warming potential.

  3. C

    All HFCs deplete ozone because they contain chlorine.

  4. D

    All HFCs can be used as direct replacements without checking equipment compatibility.

16
Choose one
1 point

Before removing oil from a stationary refrigeration appliance, what maximum system pressure is allowed under the EPA service-practice rule?

  1. A

    Reduce the system pressure to no greater than 0 psig.

  2. B

    Reduce the system pressure to no greater than 5 psig.

  3. C

    Reduce the system pressure to no greater than 15 psig.

  4. D

    No pressure reduction is required if the system is switched off.

17
Choose one
1 point

A technician is recovering refrigerant from a water-cooled low-pressure chiller. Why should water be circulated through or removed from the tubes?

  1. A

    To prevent oil from mixing with the refrigerant.

  2. B

    To prevent water in the tubes from freezing as pressure and temperature fall.

  3. C

    To keep the refrigerant from condensing in the recovery cylinder.

  4. D

    To prevent air from entering through the purge unit.

18
Choose one
1 point

A refrigeration system requires a pressure test. Which approach follows the safe-work guidance?

  1. A

    Oxygen without a regulator.

  2. B

    Compressed air with a regulator.

  3. C

    Regulated nitrogen with appropriate pressure-relief protection.

  4. D

    Any gas, provided the system is tested quickly.

19
Written response
1 point

A technician uses recovery equipment made after November 15, 1993 on a small appliance with a functional compressor. What minimum recovery percentage applies? Enter the percentage as a number.

20
Written response
1 point

A technician recovers refrigerant that will be transferred to a different owner. What processing must generally be done by an EPA-certified reclaimer before the transfer?