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Free Practice Quiz Question List

1 Small Appliance Systems and Service Safety Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Small Appliance Systems and Service Safety, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

In a typical vapor-compression system, which component absorbs heat as the refrigerant boils back into vapor?

  1. A

    The condenser absorbs heat as the refrigerant boils into vapor.

  2. B

    The evaporator absorbs heat as the refrigerant boils into vapor.

  3. C

    The compressor releases heat as the refrigerant condenses into liquid.

  4. D

    The filter-drier lowers refrigerant pressure before it enters the evaporator.

02
Choose one
1 point

A factory-manufactured, factory-charged, hermetically sealed unit contains 5.2 pounds of refrigerant. Based on the small-appliance definition, which conclusion is correct?

  1. A

    It qualifies because it is factory-sealed, regardless of refrigerant charge.

  2. B

    It qualifies because five pounds is the minimum charge for a small appliance.

  3. C

    It does not meet the small-appliance definition because its charge exceeds five pounds.

  4. D

    It qualifies only if its compressor is working.

03
Choose one
1 point

Which description best explains how a dehumidifier uses its refrigeration system to treat room air?

  1. A

    It cools air to condense moisture, then reheats the air before returning it to the room.

  2. B

    It freezes all room air in the evaporator and vents the resulting water vapor outdoors.

  3. C

    It heats air to evaporate moisture and then sends that moisture into the refrigeration circuit.

  4. D

    It cools air and returns it to the room without reheating it.

04
Choose all
1 point

Which actions help make the work area safe before servicing a small appliance? Select all correct choices.

  1. A

    Disconnect power before electrical work and verify that it is off.

  2. B

    Keep the area closed to prevent outside air from disturbing the appliance.

  3. C

    Use appropriate eye and hand protection.

  4. D

    Keep the work area ventilated.

05
Choose all
1 point

Which practices are appropriate when recovering refrigerant and handling recovery cylinders? Select all correct choices.

  1. A

    Use recovery equipment certified for small appliances.

  2. B

    Combine refrigerants in a cylinder when their pressures are similar.

  3. C

    Keep recovery cylinders upright.

  4. D

    Keep cylinders within their rated fill limits.

06
True or false
1 point

A unit must be factory-manufactured, factory-charged, hermetically sealed, and contain five pounds or less of refrigerant to meet the stated small-appliance definition.

  1. A

    True

  2. B

    False

07
True or false
1 point

Evacuating a small appliance to four inches of mercury vacuum means recovering four percent of its refrigerant.

  1. A

    True

  2. B

    False

08
Written response
1 point

What component absorbs heat from the cooled space as refrigerant boils into vapor?

09
Written response
1 point

A technician uses recovery equipment made on or after November 15, 1993, on a small appliance whose compressor does not work. What percentage of the refrigerant must be recovered under this option?

10
Fill in the blank
1 point

In a typical vapor-compression system, the raises the refrigerant vapor’s and temperature.

11
Fill in the blank
1 point

When brazing a refrigeration circuit, use for purging where specified; never use oxygen or compressed air.

12
Choose one
1 point

A technician has certified small-appliance recovery equipment made before November 15, 1993. Which percentage-recovery option meets the stated federal requirement?

  1. A

    Recover 90% because the appliance is hermetically sealed.

  2. B

    Recover 80% using the applicable pre-November 15, 1993 equipment option.

  3. C

    Recover 80% only if the appliance compressor works.

  4. D

    Recover 4% to meet the four-inch-vacuum alternative.

13
Choose one
1 point

A certified technician is closely and continually supervising an apprentice who is servicing a small appliance. Which statement best describes the possible certification exemption?

  1. A

    The apprentice may qualify for an exemption while closely and continually supervised by a certified technician.

  2. B

    The apprentice is exempt whenever a certified technician is available by phone.

  3. C

    The apprentice may service the circuit independently if the appliance contains five pounds or less of refrigerant.

  4. D

    The apprentice must recover refrigerant without supervision before being eligible for any exemption.

14
Open ended
1 point

A refrigerator’s compressor will not run, and diagnosis indicates that the repair may require opening the sealed refrigeration circuit. Describe a safe and compliant sequence of actions from initial assessment through returning the appliance to service, including the technician qualification, recovery requirement, and final checks.

15
True or false
1 point

A room air conditioner cools indoor air while rejecting heat outdoors.

  1. A

    True

  2. B

    False

16
Written response
1 point

A factory-manufactured, factory-charged, hermetically sealed appliance meets the other criteria for a small appliance. What is the greatest refrigerant charge it may contain and still meet the definition?

17
Choose one
1 point

A technician is tracing heat flow through a typical vapor-compression refrigerator. Which component absorbs heat from inside the cabinet as refrigerant boils?

  1. A

    The condenser, as refrigerant condenses into liquid

  2. B

    The evaporator, as refrigerant boils into vapor

  3. C

    The compressor, as it raises refrigerant pressure

  4. D

    The filter-drier, as it removes moisture and contaminants

18
Choose one
1 point

A dehumidifier is running in a room. Which sequence best describes how its refrigeration system treats the air?

  1. A

    It cools air and sends it outdoors without reheating it.

  2. B

    It freezes the air's moisture and stores the ice in the cabinet.

  3. C

    It cools air to condense moisture, then reheats the air before returning it.

  4. D

    It reheats air first so moisture evaporates and leaves through the drain.

19
Choose one
1 point

You are preparing to inspect damaged wiring on a small appliance. What should you do before beginning electrical work?

  1. A

    Disconnect power, verify it is off, and then begin the electrical work.

  2. B

    Begin testing live wiring, then disconnect power if a fault is found.

  3. C

    Recover refrigerant first, then leave power connected during electrical work.

  4. D

    Disconnect power only after completing the inspection and repair.

20
Written response
1 point

A small appliance has a working compressor, and the technician uses recovery equipment made on or after November 15, 1993. Under the percentage-recovery option, what percentage of the refrigerant must be recovered?