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  • Question
  • The DC voltage on most circuit boards is:


  • Options
  • A. -12 volts
  • B. 0 volts
  • C. +5 volts
  • D. +12 volts
  • E. None of the above

  • Correct Answer
  • +5 volts 


  • Computer Hardware problems


    Search Results


    • 1. A hard disk is divided into tracks which are further subdivided into:

    • Options
    • A. clusters
    • B. sectors
    • C. vectors
    • D. heads
    • E. None of the above
    • Discuss
    • 2. When installing an internal modem, all of the following IRQ's can be used except?

    • Options
    • A. 5
    • B. 10
    • C. 14
    • D. All of the above
    • E. None of the above
    • Discuss
    • 3. A 25-pin female connector on the back of your computer will typically be:

    • Options
    • A. Serial port 1
    • B. A parallel port
    • C. Docking
    • D. COM2 port
    • E. None of the above
    • Discuss
    • 4. Modems use transmission.

    • Options
    • A. synchronous
    • B. asynchronous
    • C. timed interval
    • D. ata
    • E. bank
    • Discuss
    • 5. After installing a sound card, the system locks up when a parallel port tape backup unit is also used. What is most likely the problem?

    • Options
    • A. IRQ
    • B. DMA
    • C. defective LPT port
    • D. defective tape driver
    • E. defective sound card.
    • Discuss
    • 6. What would you ask to determine if the display is working?

    • Options
    • A. Is there a video cursor or action on the screen?
    • B. Did the computer beep or chime?
    • C. Is there high voltage static on the screen
    • D. All of the above
    • E. None of the above
    • Discuss
    • 7. 14.4 modem should transmit _____ bits per second

    • Options
    • A. 14,400-15,000
    • B. 140-150
    • C. 1400-1500
    • D. 140,000-150,000
    • E. None of the above
    • Discuss
    • 8. Which step should you perform first before discharging a CRT?

    • Options
    • A. Remove the CRT from its housing
    • B. Disconnect the CRT from the computer
    • C. Remove the video assembly
    • D. Turn power off before removing power source
    • E. None of the above
    • Discuss
    • 9. The floppy drive uses which DMA (direct memory access) channel?

    • Options
    • A. 5
    • B. 4
    • C. 1
    • D. 9
    • E. 2
    • Discuss
    • 10. When not in use, it is very important to keep 5 1/4 diskettes in _____.

    • Options
    • A. Their protective sleeves
    • B. In a plastic bag
    • C. On a shelf in an upright position
    • D. In the floppy drive
    • E. None of the above
    • Discuss


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