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12 Cards in this Set
- Front
- Back
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3-99Q1
Compliance with MPE, or Maximum Permissible Exposure to RF levels (as defined in FCC Part 1, OET Bulletin 65) for “controlled” environments, are averaged over _______ minutes, while “uncontrolled” RF environments are averaged over ______ minutes. |
6, 30
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3-99Q2
Sites having multiple transmitting antennas must include antennas with more than _______% of the maximum permissible power density exposure limit when evaluating RF site exposure. |
5
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3-99Q3
RF exposure from portable radio transceivers may be harmful to the eyes because: |
RF heating may cause cataracts
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3-99Q4
At what aggregate power level is an MPE (Maximum Permissible Exposure) study required? |
1000 Watts ERP
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3-99Q5
Why must you never look directly into a fiber optic cable? |
An active fiber signal may burn the retina and infra-red light cannot be seen
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3-99Q6
If the MPE (Maximum Permissible Exposure) power is present, how often must the personnel accessing the affected area be trained and certified? |
Yearly
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3-100Q1
What device can protect a transmitting station from a direct lightning hit? |
There is no device to protect a station from a direct hit from lightning
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3-100Q2
What is the purpose of not putting sharp corners on the ground leads within a building? |
Lightning will jump off of the ground lead because it is not able to make sharp bends
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3-100Q3
Should you use a power drill without eye protection? |
No
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3-100Q4
What class of fire is one that is caused by an electrical short circuit and what is the preferred substance used to extinguish that type of fire? |
FE30
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3-100Q5
Do shorted-stub lightning protectors work at all frequencies? |
No, only at the tuned frequency band
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3-100Q6
What is a GFI electrical socket used for? |
To prevent electrical shock by sensing ground path current and shutting the circuit down
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