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1. What is the most widely used system of units, both in everyday commerce and in science?
1. International System of Units (SI)
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2. Units are divided into what two subsets?
2. Base Units & Prefixes.
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3. How many internationally based units are there?
3. Seven.
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4. What may be added to units to
produce a multiple of the original unit?
4. Prefixes.
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5. The international system of
units consists of a set of _____ together with a set of _____.
5. Units, Prefixes.
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6. Hertz equates to ___________.
6. Frequency.
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7. Watt equates to _____.
7. Power.
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8. Volt equates to _________ _________.
8. Electrical Potential.
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9. Ohm equates to ___________.
9. Resistence.
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10. What are the seven base units?
10. Tetra, Giga, Mega, Kilo, Cent, Milli, Micro.
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11. What type of sheets uses the decibal unit of measure?
11. Equipment specification sheets.
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12. What documents is used when discussing jamming effectiveness?
12. Eloctronic Warfare Documents.
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13. What is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power) relative to a specified or implied reference level?
13. Decibal (dB).
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14. Decibals is named after who?
14. Alexander Graham Bell.
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15. To express the ratio of two power levels P1 and P2 in dB, use the following conversion formula:
15. dB=(P1/P2)log x 10
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16. Who uses decibels to deal with large quantities that would be cumbersome to work with?
16. Engineers.
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17. If a decibel value is ________, the underlying ratio is greater than one. If it is ________, the ratio is less than one.
17. Positive, Negative.
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18. Effective jamming requires how much of a decibal difference?
18. 3 dB.
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19. Decibels can also be used with values that are what?
19. Absolute.
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20. Decibals express a ratio of what?
20. Two power levels.
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21. What is used as a way to express a ratio between two different power levels?
21. Decibals.
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