Ex. Module 23 Ch.2

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Ex. Module 23 Ch.2
2012-02-15 19:38:57

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  1. Which of the following materials is used to make magnetic tape?
  2. The base material of magnetic tape is made with what material?
    • Plastic
    • Metal
  3. Which of the following can happen if the magnetic particles used to make magnetic tape aren’t uniform in size?
    The tape’s surface will be abrasive which reduces the magnetic head’s life
  4. Generally, short magnetic oxide particles are used on magnetic tape to record lowfrequency signals and long particles are used to record high-frequency signals.
  5. Why does digital magnetic tape use a base material about 50 percent thicker than analog magnetic tape?
    Thicker tape allows the tape to withstand the more strenuous starts and stops
  6. There are four types of tape errors that can degrade the performance of a magnetic recording system. Which of the following tape errors is the most common and causes a 50% or more drop in signal strength
    Signal dropout
  7. Which of the following contaminants can cause signal dropouts?
    • Dust
    • Lint
    • Oil
  8. Which of the following items on magnetic tape will cause noise errors?
    • A cut
    • A scratch
  9. Magnetic tape can eventually become unusable when it comes in contact with the fixed surfaces of a recorder over long periods of time. What causes this type of tape failure?
    Normal wear
  10. Ideally, magnetic tape should be used and stored within what temperature and humidity range?
    60 - 80º F, 40 - 60% humidity
  11. Using magnetic tape in a workplace that exceeds the ideal temperature and humidity ranges can cause which of the following types of environmental damage to the tape?
    • Dirt build-up
    • Layer-to-layer sticking
    • Tape deformation
  12. At temperatures above 130 degrees, what happens to a tape's oxide coating?
    Becomes soft
  13. What causes head-to-tape sticking?
    The tape binder glue softens
  14. Which of the following environmental conditions could create static electricity which attracts dirt build-up on the tape and tape recorder parts?
    Relative humidity of 5%
  15. Excessive tape and head wear caused by increased friction as the tape passes over the heads can happen if the relative humidity is more that what maximum percent?
  16. Winding errors can happen when improper winding practices create an excessive or uneven force as the tape is being wound onto a tape reel.
  17. When winding a tape onto a reel, you notice that a sudden stop causes the outer layers of the tape to continue to spin after the inner layers have stopped. What type of deformed tape pack does this cause?
  18. The magnetic tape on your reel is unwinding unevenly and rubbing against the sides of the reel and the recorder’s tape guides. What type of deformed tape pack could cause this condition?
  19. Which of the following tape pack deformities is an example of windowing?
    The tape pack contains voids or see through air gaps
  20. Which of the following materials can be used to make tape reels?
    • Plastic
    • Metal
    • Glass
  21. The flanges of a magnetic tape reel are designed to guide the magnetic tape onto the reel.
  22. Magnetic tape is erased by exposing it to what type of magnetic field?
    A gradually decreasing ac field
  23. Which of the following is a disadvantage of using a tape recorder’s erase head to erase magnetic tape?
    It’s slow and It may not do a complete erasure
  24. Which of the following is NOT an appropriate place to keep a magnetic tape reel or cartridge?
    • Stored in a plastic bag
    • Laying on top of a magnetic tape recorder
  25. Which of the following is a CORRECT method for handling magnetic tape?
    Never handle or touch a tape’s working surface
  26. Which of the following is a CORRECT method for storing magnetic tape?
    Store tapes away from equipment that generates stray magnetic fields