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Free Practice Quiz Question List

8 Type III Certification Practice Online Quiz Questions

Use this free practice quiz with 20 questions to review 8 Type III Certification Practice, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Excessive purge-unit operation on a low-pressure chiller can be a sign that air is leaking into the system.

  1. A

    True

  2. B

    False

02
Fill in the blank
1 point

Complete the recovery sequence: Recover refrigerant first, then .

03
Written response
1 point

To reduce refrigerant release, heat oil to what temperature before removing it? Enter the value in °F.

04
Choose one
1 point

A technician is leak-testing a low-pressure centrifugal chiller with nitrogen. What is the maximum test pressure?

  1. A

    25 mm Hg absolute

  2. B

    10 psig

  3. C

    0 psig

  4. D

    15 psig

05
Choose one
1 point

Before leak-testing a low-pressure system, which method is preferred for raising its pressure?

  1. A

    Rely only on a pressure-decay test

  2. B

    Run the purge unit until pressure increases

  3. C

    Use controlled heating, such as hot water or a built-in heating device

  4. D

    Evacuate the appliance before testing

06
True or false
1 point

True or false: A pressure-decay test by itself can pinpoint the location of a leak in a low-pressure appliance.

  1. A

    True

  2. B

    False

07
Choose all
1 point

Select all cases that meet the definition of a major repair to a low-pressure appliance.

  1. A

    Removing a compressor

  2. B

    Leaving an opening with exactly 4 square inches of flow area uncovered for 20 minutes

  3. C

    Removing an evaporator

  4. D

    Leaving an opening with more than 4 square inches of flow area uncovered for 16 minutes

08
Fill in the blank
1 point

During evacuation, circulate or remove chiller water as needed to prevent it from .

09
Written response
1 point

What is the normal evacuation endpoint for a low-pressure appliance? Enter the value in mm Hg absolute.

10
Choose one
1 point

A refrigerant in a low-pressure appliance has a boiling point of 80°F at standard atmospheric pressure. Which approach must the technician avoid when preparing the appliance for opening?

  1. A

    Use nitrogen and plan to purge it afterward

  2. B

    Avoid nitrogen or another method that requires subsequent purging

  3. C

    Raise the pressure above 10 psig

  4. D

    Evacuate the appliance to 25 mm Hg of vacuum

11
Choose all
1 point

A leak prevents a low-pressure appliance from reaching its normal evacuation level. Select all appropriate actions for handling its leaking and non-leaking components.

  1. A

    Isolate leaking from non-leaking components where possible

  2. B

    Evacuate non-leaking components to the normal required level

  3. C

    Evacuate the leaking component only to the normal level, even if this substantially contaminates recovered refrigerant

  4. D

    Evacuate the leaking component to the lowest attainable level without substantially contaminating recovered refrigerant, but not above 0 psig

12
Choose one
1 point

A purge unit persistently collects moisture on a low-pressure chiller. Which possible leak location does this clue suggest?

  1. A

    The recovery equipment's high-pressure cutout has activated

  2. B

    A leak may be present in the chiller or condenser tubes

  3. C

    The refrigerant has necessarily been fully recovered

  4. D

    The appliance has exceeded the normal evacuation endpoint

13
Open ended
1 point

A technician is preparing a low-pressure appliance containing a higher-boiling-point refrigerant for a non-major repair. The appliance will not be evacuated to the atmosphere after the repair. Describe the pressure condition required before opening and how the technician may raise the pressure for this refrigerant.

14
Choose one
1 point

High head pressure is observed on a low-pressure chiller. Which condition may this indicate?

  1. A

    Air may be present in the system

  2. B

    The system has necessarily reached its required recovery vacuum

  3. C

    The refrigerant must be at or below 0 psig

  4. D

    The purge unit has located the exact leak

15
Choose one
1 point

After the required recovery vacuum is reached, the pressure rises during the subsequent check. What should the technician do?

  1. A

    Stop recovery because the required vacuum was reached once

  2. B

    Open the appliance immediately

  3. C

    Continue recovery as appropriate because refrigerant may remain or be boiling out of the oil

  4. D

    Raise the test pressure above 10 psig

16
True or false
1 point

True or false: For normal opening or disposal of a low-pressure appliance, the required evacuation endpoint changes depending on whether the recovery equipment was manufactured before or on/after November 15, 1993.

  1. A

    True

  2. B

    False

17
Written response
1 point

When recovering refrigerant from an appliance, which phase should be recovered first, and which phase should follow?

18
Choose one
1 point

A technician is about to remove oil from a low-pressure appliance. What should the technician do first to reduce refrigerant release from the oil?

  1. A

    Remove the oil while cold to keep refrigerant dissolved.

  2. B

    Heat the oil to 130°F before removing it.

  3. C

    Add nitrogen to the oil until it reaches atmospheric pressure.

  4. D

    Evacuate the appliance to 0 psig before removing the oil.

19
Written response
1 point

For normal opening or disposal, what is the required evacuation endpoint for a low-pressure appliance? Enter the value in mm Hg absolute.

20
Choose one
1 point

A low-pressure chiller’s purge unit begins operating excessively. Which explanation best fits this symptom?

  1. A

    It shows that liquid refrigerant is being recovered before vapor.

  2. B

    Air and moisture may be entering the below-atmospheric-pressure system and reaching the purge unit.

  3. C

    The appliance has reached 25 mm Hg absolute and no refrigerant remains.

  4. D

    The purge unit is raising the chiller pressure above 10 psig.