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3 Type II: High- and Very-High-Pressure Appliances Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Type II: High- and Very-High-Pressure Appliances, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Recovering refrigerant removes it from an appliance and stores it in an external container, but does not necessarily clean or test it.

  1. A

    True

  2. B

    False

02
True or false
1 point

True or false: It is safe to energize a hermetic compressor while it is under vacuum.

  1. A

    True

  2. B

    False

03
Fill in the blank
1 point

To allow for liquid expansion, never fill a recovery cylinder beyond of its capacity.

04
Choose one
1 point

A technician needs to pressure-test a refrigeration system for leaks before charging it. Which test gas is appropriate?

  1. A

    Oxygen

  2. B

    Dry nitrogen

  3. C

    Compressed air

  4. D

    Refrigerant vapor alone

05
True or false
1 point

True or false: System-dependent recovery equipment may not be used on a system containing more than 15 pounds of refrigerant.

  1. A

    True

  2. B

    False

06
Choose all
1 point

Which two observations are identified as possible evidence of a refrigerant leak? Select all correct choices.

  1. A

    Excessive superheat

  2. B

    A recovery cylinder below its fill limit

  3. C

    Oil traces around a leak on a hermetic system

  4. D

    A pressure chart in psia

07
Written response
1 point

On what date did separate EPA leak-repair rules for certain appliances containing 15 pounds or more of an HFC or covered HFC substitute begin to apply? Enter the full date.

08
Choose one
1 point

A technician compares an absolute-pressure reading with a gauge-pressure reading at sea level. Which statement correctly describes the relationship between psia and psig?

  1. A

    They are identical at all elevations.

  2. B

    Psia is gauge pressure, and psig is absolute pressure.

  3. C

    Psia is absolute pressure, and psig is gauge pressure; at sea level they differ by about 14.7 psi.

  4. D

    Psig includes refrigerant temperature, while psia does not.

09
Choose all
1 point

Which practices are appropriate safety measures when servicing equipment in a machinery room? Select all correct choices.

  1. A

    Follow applicable requirements for ventilation.

  2. B

    Follow applicable requirements for alarms.

  3. C

    Pressurize the system with compressed air before entering.

  4. D

    Use oxygen-deprivation monitoring where required.

  5. E

    Wear appropriate gloves and eye protection.

10
Fill in the blank
1 point

Under the traditional Section 608 rules for appliances containing 50 pounds or more of ozone-depleting refrigerant, the annual leak-repair trigger rate for commercial refrigeration is .

11
Written response
1 point

A high-pressure appliance has a full charge of exactly 200 pounds. The recovery equipment was made after November 15, 1993. What evacuation level, in inches of mercury vacuum, is required?

12
Choose one
1 point

A technician wants to speed up refrigerant recovery while following equipment instructions. Which approach is generally recommended?

  1. A

    Recover vapor first because liquid slows recovery.

  2. B

    Recover liquid first when practical.

  3. C

    Mix refrigerants in the recovery cylinder to increase recovery speed.

  4. D

    Bypass the recovery equipment instructions.

13
Open ended
1 point

A leak prevents a high-pressure appliance from reaching its required evacuation level. Explain how the technician should handle leaking and non-leaking components, and state the applicable opening-pressure rule for a non-major repair that is not followed by venting the appliance to the environment.

14
Choose one
1 point

A high-pressure appliance has a full charge of 240 pounds. Which evacuation levels apply when using recovery equipment made before versus after November 15, 1993?

  1. A

    The equipment date does not affect the required level.

  2. B

    The required level is 0 inches of mercury vacuum for both equipment dates.

  3. C

    The required level is 10 inches of mercury vacuum for pre-1993 equipment and 4 inches for post-1993 equipment.

  4. D

    The required level is 4 inches of mercury vacuum for pre-November 15, 1993 equipment and 10 inches for post-November 15, 1993 equipment.

15
Choose one
1 point

Before charging a high-pressure refrigeration system, which leak-testing approach follows the safety requirements?

  1. A

    Use compressed air with a regulator, since it is readily available.

  2. B

    Use dry nitrogen with a pressure regulator and relief device, staying within equipment limits.

  3. C

    Use oxygen with a relief device, provided the system is not charged.

  4. D

    Use nitrogen without a regulator so the test pressure rises quickly.

16
Choose one
1 point

A technician wants to speed up recovery from an appliance. Which approach is generally recommended when practical?

  1. A

    Recover vapor first and vent remaining liquid to the atmosphere.

  2. B

    Mix the refrigerant with another type to increase recovery speed.

  3. C

    Recover liquid first when practical.

  4. D

    Recover only vapor because liquid recovery is prohibited.

17
Choose one
1 point

After reaching the required evacuation level, a technician waits a few minutes and sees the system pressure rise. What is the most appropriate interpretation?

  1. A

    It may indicate refrigerant remains in liquid form or is coming out of oil, so recovery may need to continue.

  2. B

    It proves the appliance contains no refrigerant and recovery is complete.

  3. C

    It means the system should be charged immediately without further checks.

  4. D

    It shows that the recovery cylinder has reached its 80% capacity limit.

18
Choose one
1 point

A covered commercial-refrigeration appliance contains 18 pounds of an HFC. Under the EPA HFC provisions that apply as of January 1, 2026, which annual leak-rate trigger applies?

  1. A

    The 10% comfort-cooling trigger applies because all air-conditioning and refrigeration appliances share one rate.

  2. B

    No HFC leak-repair provisions can apply unless the appliance contains at least 50 pounds.

  3. C

    The 30% industrial-process-refrigeration trigger applies to every commercial appliance.

  4. D

    The commercial-refrigeration trigger is 20%, provided the appliance is covered by the HFC provisions.

19
Written response
1 point

For a high-pressure appliance with a full charge of 200 pounds or more, what evacuation level is required when using recovery equipment made after November 15, 1993? Enter the value in inches of mercury vacuum.

20
Written response
1 point

If a leak prevents a component from reaching the required evacuation level, what is the maximum pressure in psig to which refrigerant may remain in that leaking component after recovery?