Refrigeration Quiz - 10 Questions

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| By Catherine Halcomb
Catherine Halcomb
Community Contributor
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| Attempts: 231
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  • 1/10 Questions

    What function does a relay do on a refrigerator?

    • Makes ice
    • Monitors the temperature in the fresh food compartment
    • Starts the compressor
    • Absorbs contaminants in the sealed system
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Refrigeration Quiz - 10 Questions - Quiz

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  • 2. 

    What is the state of refrigerant in a condenser when a refrigerator is running?

    • High pressure vapor/liquid

    • Low pressure vapor/liquid

    • No pressure vapor/liquid

    • None of the above

    Correct Answer
    A. High pressure vapor/liquid
    Explanation
    When a refrigerator is running, the refrigerant in the condenser is in a state of high pressure vapor/liquid. This is because the condenser is responsible for releasing heat from the refrigerant, causing it to condense from a high pressure vapor to a high pressure liquid. The high pressure is necessary for the refrigerant to effectively transfer heat and maintain the cooling process in the refrigerator.

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  • 3. 

    What is the state of refrigerant in an evaporator when a refrigerator is running?

    • High pressure vapor/liquid

    • Low pressure vapor/liquid

    • No pressure vapor/liquid

    • None of the above

    Correct Answer
    A. Low pressure vapor/liquid
    Explanation
    When a refrigerator is running, the state of refrigerant in the evaporator is a low pressure vapor/liquid. This is because the evaporator is responsible for absorbing heat from the refrigerator's contents, causing the refrigerant to evaporate and turn into a low pressure vapor. However, there may still be some liquid refrigerant present in the evaporator as well. Therefore, the correct answer is low pressure vapor/liquid.

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  • 4. 
    What is this component called? - ProProfs

    What is this component called?

    • Defrost Heater

    • Defrost Timer

    • Defrost Bi-metal

    • None of the above

    Correct Answer
    A. Defrost Timer
    Explanation
    The correct answer is Defrost Timer. The defrost timer is a component in a refrigerator or freezer that controls the automatic defrost cycle. It regulates when the defrost heater turns on to melt any ice buildup on the evaporator coils, preventing them from becoming blocked and ensuring efficient cooling. The defrost timer typically operates on a set time schedule, activating the defrost cycle at regular intervals.

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  • 5. 
    How do you check a thermistor? - ProProfs

    How do you check a thermistor?

    • Isolate and check for less than one ohm

    • Isolate and check for more than one ohm

    • Check for the appropriate resistance based on temperature - each one is specific to the model

    • Check for the appropriate resistance based on temperature - at room temperature usually 1100 ohms

    Correct Answer
    A. Check for the appropriate resistance based on temperature - each one is specific to the model
    Explanation
    The correct answer is to check for the appropriate resistance based on temperature, as each thermistor model has a specific resistance value at different temperatures. By measuring the resistance of the thermistor, one can determine if it is functioning properly and accurately sensing temperature changes.

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  • 6. 

    The purpose of the defrost cycle to remove frost from 

    • The icemaker

    • The freezer shelving

    • The condenser

    • The evaporator

    Correct Answer
    A. The evaporator
    Explanation
    The purpose of the defrost cycle is to remove frost from the evaporator. During normal operation, moisture in the air inside the freezer can condense on the evaporator coils and freeze, forming a layer of frost. This frost can reduce the efficiency of the freezer and prevent proper cooling. The defrost cycle activates periodically to melt this frost, allowing the evaporator coils to operate efficiently and maintain proper cooling temperatures.

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  • 7. 
    Defrost bi-metals are universal and can fit into any model or brand. - ProProfs

    Defrost bi-metals are universal and can fit into any model or brand.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement is false because defrost bi-metals are not universal and cannot fit into any model or brand. Different models and brands may have different specifications and requirements for their defrost systems, including the type and size of the bi-metal used. Therefore, it is important to select a defrost bi-metal that is specifically designed and compatible with the model or brand of the appliance.

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  • 8. 

    How do you test a PTC relay?

    • Check resistance between start and run, should have 20 - 50 ohms

    • Check voltage at the PTC relay

    • Check resistance between start and run, should have 4 - 10 ohms

    • There is no way to accurately check a PTC relay

    Correct Answer
    A. Check resistance between start and run, should have 4 - 10 ohms
    Explanation
    To test a PTC relay, one should check the resistance between the start and run terminals. The resistance should ideally measure between 4 to 10 ohms. This test helps determine if the PTC relay is functioning properly.

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  • 9. 

    What does PTC stand for, in regards to a PTC relay?

    • Pressure Temperature Coefficient

    • Positive Temperature Coefficient

    • Positive Time Compressor

    • Pressure Temperature Compressor

    Correct Answer
    A. Positive Temperature Coefficient
    Explanation
    The correct answer is "Positive Temperature Coefficient." In regards to a PTC relay, PTC stands for Positive Temperature Coefficient. This refers to a type of relay that uses a temperature-sensitive resistor to control the flow of current. As the temperature increases, the resistance of the PTC relay also increases, causing the current to decrease. This characteristic makes PTC relays useful for protecting electrical circuits from overheating and overcurrent situations.

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  • 10. 

    What is the type of lubricant used for door gaskets?

    • Thin film of WD-40 on the hinge side

    • Thin film of vasoline on the hinge side

    • Thin film of zoom spout on the hinge side

    • Thin film of lithium grease on the hinge side

    Correct Answer
    A. Thin film of vasoline on the hinge side
    Explanation
    Vaseline is commonly used as a lubricant for door gaskets because it is a thick, petroleum-based jelly that helps to reduce friction and keep the gaskets flexible. Applying a thin film of Vaseline on the hinge side of the door gaskets can help to prevent them from sticking or squeaking when the door is opened or closed. The viscosity of Vaseline allows it to stay in place and provide long-lasting lubrication.

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  • Current Version
  • Mar 05, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • May 15, 2015
    Quiz Created by
    Catherine Halcomb
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