Use this free practice quiz with 20 questions to review 8 Service Practice and Case Exercises, test your knowledge, and prepare for your next test or exam.
A refrigerator runs nearly all day, but its freezer is cold and its fresh-food compartment is warm. The condenser coils are dusty and the evaporator fan is not moving air. Does the continuous operation by itself prove that the sealed system has a refrigerant problem?
True
False
Before inspecting the electrical components of a small appliance, which action follows the safe service method?
Leave power connected so the appliance's controls remain available during inspection.
Disconnect power and verify that the circuit is de-energized before inspecting electrical components.
Disconnect power only after removing the electrical cover.
Begin inspection with the appliance running, then disconnect power if a problem is found.
What is the maximum refrigerant charge, in pounds, for an appliance to meet the small-appliance definition described here? Enter the number only.
A small refrigerator is warm inside. Its evaporator fan runs intermittently, the door gasket is loose, and frost covers part of the evaporator. What is the best initial diagnostic approach?
Open the refrigerant circuit immediately because any frost pattern proves a leak.
Replace the compressor first because the refrigerator is warm.
Check the gasket, airflow, fan, defrost system, and controls before deciding whether the sealed system needs attention.
Add refrigerant before investigating the appliance's other symptoms.
When working with an appliance that contains flammable refrigerant, which precautions are appropriate? Select all that apply.
Use equipment and procedures specifically approved for the flammable refrigerant.
Keep ignition sources nearby so they are available if needed.
Keep ignition sources away from the work area.
Use appropriate personal protective equipment and ventilate the area.
What manufacture date separates the pre-November 15, 1993 equipment category from the on-or-after category in the small-appliance recovery requirements?
As an alternative to meeting the applicable recovery percentage, evacuate the appliance to of mercury vacuum.
An appliance's refrigerant label is damaged, and the available recovery machine and cylinder are labeled for a different refrigerant. What should the technician do?
Connect the available machine and cylinder because the appliance is small.
Use the different-refrigerant cylinder if it appears to be empty.
Proceed with the recovery machine and identify the refrigerant after opening the system.
Identify the refrigerant, confirm that the equipment is suitable, and stop if compatibility cannot be established.
Which practices apply when planning and performing refrigerant recovery? Select all that apply.
Follow the recovery equipment manufacturer's directions.
Keep recovered refrigerant identified and contained.
Release a small amount intentionally if that makes the procedure easier.
Use properly certified equipment and prevent refrigerant release.
A household freezer is being discarded with its compressor intact. The worker must arrange proper refrigerant recovery before disposal rather than cut a refrigerant line.
True
False
For equipment manufactured on or after November 15, 1993, the recovery requirement by percentage is % when the appliance compressor functions and % when it does not.
After completing a small-appliance repair, describe the checks and documentation needed to verify the repair safely.
Under Section 608, which category of service is covered by Type I certification?
Servicing all stationary refrigeration equipment regardless of size.
Servicing small appliances.
Recovering refrigerant only from appliances headed for disposal.
Repairing electrical components in any household appliance.
If recovery equipment is certified, a technician may ignore the equipment manufacturer's directions whenever a different procedure seems faster.
True
False
Under the Type I definition, what is the maximum refrigerant charge for an appliance to qualify as a small appliance? Enter the value in pounds.
Before inspecting or repairing an appliance's electrical components, which action best follows the safe-service procedure?
Leave the appliance plugged in and turn its controls to off.
Start by disconnecting the evaporator fan while the appliance is running.
Disconnect power and verify the circuit is de-energized before electrical inspection or repair.
Restore power before checking electrical connections.
An appliance's refrigerant label is damaged, and the available recovery machine and cylinder are labeled for a different refrigerant. What should the technician do before connecting any equipment?
Connect the available equipment and identify the refrigerant after recovery.
Identify the refrigerant from reliable information and confirm compatibility of the machine, hoses, and cylinder before proceeding.
Use the available cylinder if it is empty, regardless of its label.
Mix the refrigerants in the available cylinder so none is released.
What exact manufacturing date marks the change from the pre-cutoff recovery rule to the on-or-after-cutoff rule? Enter the date as YYYY-MM-DD.
A small appliance was manufactured after November 15, 1993, and its compressor is not functioning. If the technician uses the percentage-based recovery route, what percentage must be recovered?
Recover 80% of the refrigerant.
Recover 90% of the refrigerant.
Recover 100% of the refrigerant in every case.
No recovery is required if the appliance is factory-sealed.
A technician is considering the alternative to meeting the applicable percentage-based Type I recovery requirement. Which procedure is specified?
Evacuate to 4 inches of mercury pressure.
Recover a fixed 50% of the charge.
Evacuate to 4 inches of mercury vacuum.
Release the remaining refrigerant after the compressor stops.
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