Test Your Knowledge Of Atx Power Supplies

33 Questions | Total Attempts: 905

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Test Your Knowledge Of Atx Power Supplies - Quiz

An electronic switch typically controls an ATX power supply. Instead of a hard switch at the main power input, the power button on an ATX system is a sensor input monitored by the computer. What else do you know about Atx power supplies? Take up this quiz and test your knowledge.


Questions and Answers
  • 1. 
    "Soft power" on ATX power supplies is designed to
    • A. 

      Decrease noise in the +12V lines.

    • B. 

      Enable software to electronically control the on/off switching of power.

    • C. 

      Supply better filtered power for the P4 connector.

    • D. 

      Prevent surges from damaging the motherboard.

    • E. 

      Provide +3.3V and +5V to the AUX connector.

  • 2. 
    Standby power provides
    • A. 

      +3.3V

    • B. 

      -3.3V

    • C. 

      +5V

    • D. 

      -5V

    • E. 

      +12V

  • 3. 
    The purple wire is for
    • A. 

      Standby

    • B. 

      Power Good

    • C. 

      +12V

    • D. 

      Power on

    • E. 

      +3.3V sense

  • 4. 
    The motherboard maintains power even while the computer is turned off.
    • A. 

      True

    • B. 

      False

  • 5. 
    The purple wire is always
    • A. 

      Powered

    • B. 

      Off

  • 6. 
    The "Power Good" wire is
    • A. 

      Purple

    • B. 

      Blue

    • C. 

      Yellow

    • D. 

      White

    • E. 

      Gray

  • 7. 
    Yellow wires provide
    • A. 

      +5V

    • B. 

      +3.3V

    • C. 

      +12V

    • D. 

      -12V

    • E. 

      "Power Good" signals

  • 8. 
    Orange wires provide
    • A. 

      +3.3V sense

    • B. 

      -3.3V sense

    • C. 

      +3.3V

    • D. 

      -3.3V

    • E. 

      +5V

  • 9. 
    The brown wire is for
    • A. 

      +5V standby

    • B. 

      -5V

    • C. 

      Ground

    • D. 

      +3.3V sense

    • E. 

      Power On

  • 10. 
    The blue wire provides
    • A. 

      Power On

    • B. 

      +5V standby

    • C. 

      Power Good

    • D. 

      +12V

    • E. 

      -12V

  • 11. 
    Red wires provide
    • A. 

      +3.3V

    • B. 

      +5V

    • C. 

      +5V standby

    • D. 

      +12V

    • E. 

      Power On

  • 12. 
    Black wires are for
    • A. 

      -12V

    • B. 

      Ground

    • C. 

      -5V

    • D. 

      Power On

    • E. 

      +3.3V sense

  • 13. 
    The white wire is for
    • A. 

      Ground

    • B. 

      24VAC

    • C. 

      +5V

    • D. 

      +12V

    • E. 

      -5V

  • 14. 
    The P1 connector on ATX12V 1.x power supplies has a total of ____ pins.
  • 15. 
    The P1 connector on ATX12V 2.x power supplies has a total of ____ pins.
  • 16. 
    The P4 connector was designed to provide
    • A. 

      +12V to the case fan

    • B. 

      +5V and +12V to PATA hard drives

    • C. 

      +5V of standby power

    • D. 

      +12V to the CPU

    • E. 

      +5V and +12V to floppy drives

  • 17. 
    PATA hard drives get power through _____ connectors
    • A. 

      Four-pin

    • B. 

      6-pin

    • C. 

      AUX

    • D. 

      P4

    • E. 

      Molex

  • 18. 
    The red wire in a Molex connector provides
    • A. 

      +5V

    • B. 

      -5V

    • C. 

      +12V

    • D. 

      -12V

    • E. 

      Ground

  • 19. 
    The standard power connector for floppy drives is the four-pin ______ connector.
  • 20. 
    Ernie decides to upgrade Bert's 250W power supply to a 1000W unit. The first thing Ernie should do is
    • A. 

      Unplug the power cord

    • B. 

      Consider the form factors of the power supply, motherboard, and case

    • C. 

      Calculate the wattage requirements of the various system components

    • D. 

      Test the surge suppressor

    • E. 

      Test the power outlet

  • 21. 
    Ernie picked up a brand new ATX12V 2.0 PSU to replace the one in Bert's system. What will happen when Ernie tries to plug the 6-pin AUX connector into the motherboard?
    • A. 

      The motherboard will beep twice and refuse to boot

    • B. 

      He'll find that it's impossible

    • C. 

      The power supply will begin smoking, sending Bert into a panic

    • D. 

      Nothing. Everything will work just fine.

  • 22. 
    The 6-pin AUX connector provides
    • A. 

      +3.3V

    • B. 

      +3.3V and +5V

    • C. 

      +5V

    • D. 

      +5V and +12V

    • E. 

      +12V

  • 23. 
    ATX12V 1.x and 2.x P1 connectors are not compatible
    • A. 

      True

    • B. 

      False

  • 24. 
    A 1000W PSU upgrade will burn out a system currently using a 300W PSU.
    • A. 

      True

    • B. 

      False

  • 25. 
    Ernie added a 3-drive RAID, new Blu-ray disc burner, TV tuner card, and top of the line video card to Bert's 200W system. The next day, Bert notices that his computer keeps shutting off while he's cataloging his paper clip collection in Excel. What is the first thing Ernie should suspect?
    • A. 

      A defective power supply

    • B. 

      There's a resource conflict

    • C. 

      One of the hard drives is about to go bad

    • D. 

      A brownout

    • E. 

      The power supply wattage is not high enough to support all the newly added devices.

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