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Free Practice Quiz Question List

2 Safe Service Preparation and Diagnostics Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Safe Service Preparation and Diagnostics, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

A refrigeration system appears to be performing poorly, but no specific refrigerant-circuit fault has been established. What is the safest initial troubleshooting approach?

  1. A

    Connect gauges immediately to check refrigerant pressure.

  2. B

    Check accessible operating conditions and controls first.

  3. C

    Loosen a fitting to see whether the circuit contains pressure.

  4. D

    Replace the refrigerant before checking other possible causes.

02
True or false
1 point

A technician has switched off the appliance’s electrical disconnect. This proves that the refrigerant circuit is depressurized.

  1. A

    True

  2. B

    False

03
Written response
1 point

What information should a technician review to check a refrigerant’s flammability, toxicity, and asphyxiation hazards?

04
Fill in the blank
1 point

PPE must fit, be in , and be used within its stated limitations.

05
Choose one
1 point

When a task requires a face shield, how should the technician wear it?

  1. A

    A face shield replaces safety glasses whenever splash hazards are present.

  2. B

    A face shield is used only when no other eye protection is available.

  3. C

    A face shield is worn over primary eye protection when needed.

  4. D

    A face shield makes it unnecessary to assess eye hazards.

06
Choose all
1 point

Select all correct practices for preparing service tools and instruments.

  1. A

    Use pressure instruments, hoses, and fittings rated for the expected pressure and compatible with the refrigerant and connections.

  2. B

    Use damaged hoses if the expected pressure is low.

  3. C

    Inspect hoses, leads, and fittings before use.

  4. D

    Use a correctly rated electrical meter for electrical checks.

  5. E

    Follow the manufacturer’s instructions for the instrument and appliance.

  6. F

    Improvise adapters if the fittings do not match.

07
Written response
1 point

Which Section 608 certification type covers high- and very-high-pressure appliances, except small appliances and motor-vehicle air conditioners?

08
True or false
1 point

In the United States, service that could reasonably be expected to release refrigerant generally requires Section 608 certification.

  1. A

    True

  2. B

    False

09
Fill in the blank
1 point

Complete the tool-safety instruction: Do not use damaged equipment, exceed its rating, or .

10
Choose all
1 point

A technician suspects a significant refrigerant leak in an area that may have an unsafe atmosphere. Select all appropriate actions.

  1. A

    Avoid entering or remaining in an area where the atmosphere may be unsafe.

  2. B

    Keep other people clear of the area.

  3. C

    Stay to investigate the leak if no flame is visible.

  4. D

    Follow the site emergency plan.

  5. E

    Obtain qualified help.

11
Choose one
1 point

A technician obtains a pressure reading during diagnostics. Which approach supports a sound interpretation of that reading?

  1. A

    Treat any high reading as proof that the appliance is overcharged.

  2. B

    Use the reading without checking which refrigerant is in the system.

  3. C

    Ignore operating conditions if the instrument is accurate.

  4. D

    Interpret the reading alongside refrigerant identity, operating conditions, instrument accuracy, and manufacturer service data.

12
Open ended
1 point

Before service, a technician finds that the refrigerant is unidentified, ventilation is inadequate, and a pressure component is damaged. Explain what the technician should do and why.

13
True or false
1 point

During stationary appliance service, intentionally venting most refrigerants is prohibited by the EPA.

  1. A

    True

  2. B

    False

14
Choose one
1 point

Why should a technician avoid treating one pressure reading as a complete diagnosis?

  1. A

    A pressure reading alone fully diagnoses a system if the instrument is in good condition.

  2. B

    A pressure reading must be interpreted in the context of refrigerant identity, operating conditions, instrument accuracy, and manufacturer service data.

  3. C

    Pressure readings should never be used in refrigeration diagnostics.

  4. D

    The refrigerant identity is unnecessary if the technician knows the pressure.

15
Choose one
1 point

A refrigeration appliance is running poorly, but no refrigerant-circuit work has been shown to be necessary. What is the safest initial diagnostic approach?

  1. A

    Connect pressure gauges immediately to determine whether the refrigerant charge is low.

  2. B

    Check accessible airflow, controls, and electrical conditions first.

  3. C

    Loosen a fitting slightly to see whether refrigerant is present.

  4. D

    Replace the appliance's refrigerant before investigating other causes.

16
Choose one
1 point

A task's hazard assessment indicates that both primary eye protection and a face shield are needed. How should the technician wear them?

  1. A

    Wear the face shield instead of safety glasses because it covers the whole face.

  2. B

    Wear safety glasses only; a face shield cannot be used during service.

  3. C

    Wear the face shield over suitable primary eye protection when needed.

  4. D

    Wear the face shield only after a refrigerant leak has occurred.

17
Written response
1 point

Before servicing a system, what document should a technician consult for information about the refrigerant's hazards, such as flammability or toxicity?

18
Choose one
1 point

A technician has opened the electrical disconnect before service. What should the technician conclude about pressure in the refrigerant circuit?

  1. A

    Treat electrical isolation and pressure control as separate safety issues.

  2. B

    Assume the circuit is depressurized once the electrical disconnect is open.

  3. C

    Loosen a fitting to check whether pressure remains.

  4. D

    Use the electrical meter reading to determine refrigerant pressure.

19
Choose one
1 point

Before connecting pressure instruments to an identified system, which preparation is appropriate?

  1. A

    Use any available hose if it fits the service port.

  2. B

    Use a damaged instrument if its pressure display still works.

  3. C

    Choose equipment based only on the appliance's electrical rating.

  4. D

    Confirm compatibility and pressure rating, then inspect the equipment before use.

20
Written response
1 point

Under the material's U.S. Section 608 guidance, an apprentice performing service that could release refrigerant must be closely and continually supervised by whom?