Free Practice Quiz Question List

5 Appliance Servicing and Return to Service Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Appliance Servicing and Return to Service, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: Oxygen or compressed air may be used to pressurize a refrigerant circuit for leak testing.

A
True
B
False

Choose one

1 point

A technician suspects a refrigerant leak. Which approach can help identify where the leak is located?

A
Treat a pressure or vacuum decay check as sufficient to identify the leak location.
B
Use a suitable leak-location method to investigate the suspected leak.
C
Add refrigerant before inspecting the circuit.
D
Pressurize the circuit with oxygen to reveal the leak.

Written response

1 point

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

Fill in the blank

1 point

After repair, evacuate the circuit according to to remove air and moisture.

Choose one

1 point

For an appliance subject to the applicable EPA leak-repair rules, when should the required initial verification test be performed?

A
After charging, as a replacement for startup checks.
B
Before diagnosing the fault.
C
After repair and before adding refrigerant, when the applicable rules require it.
D
Only after the appliance has operated for several days.

Fill in the blank

1 point

At startup, compare relevant pressures, temperatures, superheat or subcooling, and capacity indicators with .

True or false

1 point

True or false: An appliance may be returned to service even if its operation is unstable, provided the original complaint has improved.

A
True
B
False

Choose one

1 point

A repaired appliance is ready to be charged. Which procedure is appropriate?

A
Use whichever refrigerant is available, then adjust until pressures look normal.
B
Use the correct refrigerant and specified amount and method, and record the quantity added.
C
Add refrigerant until the appliance runs quietly, without checking specifications.
D
Charge by recovering refrigerant from another appliance without identifying its type.

Choose one

1 point

A technician adds refrigerant to an appliance that normally contains 50 lb or more of ozone-depleting refrigerant. Which documentation must be provided to the owner or operator?

A
Any appliance, regardless of refrigerant type or charge size, must receive a leak-inspection report.
B
Only appliances with less than 50 lb of ozone-depleting refrigerant require documentation of refrigerant added.
C
For an appliance normally containing 50 lb or more of ozone-depleting refrigerant, provide documentation showing the amount added.
D
Documentation is needed only if the appliance is not returned to service.

Open ended

1 point

A technician has diagnosed a refrigerant-circuit fault and is preparing to service the appliance. Describe the main steps the technician should take from preparation through the decision to return the appliance to service and close out the visit.

Choose one

1 point

Before disturbing an appliance’s refrigerant circuit, which action best follows the recommended service workflow?

A
Open the circuit and recover refrigerant before inspecting the appliance.
B
Inspect and diagnose the appliance before disturbing the circuit.
C
Add refrigerant until the reported symptom disappears.
D
Restore the appliance to service before checking its controls.

True or false

1 point

An appliance may be returned to service even when its operation is unstable, as long as the service report documents the instability.

A
True
B
False

Choose one

1 point

Which statement follows the service guidance for pressure-testing a refrigerant circuit?

A
Use oxygen if the pressure is kept below the appliance’s operating pressure.
B
Use compressed air if the circuit has been isolated from the rest of the appliance.
C
Never use oxygen or compressed air to pressurize the refrigerant circuit.
D
Use either gas only after the circuit has been evacuated.

Choose one

1 point

For an appliance subject to applicable EPA leak-repair rules, when must the required initial verification test be performed?

A
After repair and before adding refrigerant.
B
Only after the appliance has operated for a full day.
C
Before diagnosing the leak, to establish a baseline.
D
After returning the appliance to service.

Written response

1 point

For an appliance normally containing 50 lb or more of ozone-depleting refrigerant, what refrigerant-related quantity must the invoice or other documentation provided to the owner or operator show?

Choose one

1 point

Which statement correctly distinguishes the recovery endpoint used before opening an appliance from the later evacuation of a repaired circuit?

A
The EPA recovery endpoint is the deep vacuum used to remove moisture after repair.
B
The recovery endpoint before opening is not the same as the deeper vacuum used later to dehydrate the repaired circuit.
C
Both endpoints are always identical because they serve the same purpose.
D
The deeper vacuum is required before any refrigerant can be recovered.

Written response

1 point

When a leak prevents recovery to the required level, what is the maximum pressure, in psig, that must not be exceeded for the leaking portion?

Written response

1 point

If further work is necessary, what operating-status information must the technician communicate to the owner or operator?

Choose all

1 point

A technician is preparing to service an unfamiliar appliance. Which actions are appropriate before beginning the work? Select all that apply.

A
Obtain authorization for the work.
B
Review the manufacturer’s procedures.
C
Begin work without identifying possible electrical or pressure hazards.
D
Identify relevant hazards and select compatible, rated tools and equipment.

Choose all

1 point

Which statements accurately describe the applicability of EPA leak-repair provisions? Select all that apply.

A
The leak-repair provisions apply to qualifying appliances using ozone-depleting refrigerants.
B
The leak-repair provisions automatically apply to every appliance, regardless of refrigerant.
C
The leak-repair provisions generally do not apply to appliances using non-exempt substitute refrigerants.
D
If the leak-repair provisions do not apply, no other Section 608 requirements can apply.

5 Appliance Servicing and Return to Service Online Quiz Questions

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