Monday, February 15, 2010
This quiz is based on the Propagation
slide presentation made at the EARS February meeting.
1. Effective radio communication results from which of these factors:
This quiz is based on the Propagation
slide presentation made at the EARS February meeting.
1. Effective radio communication results from which of these factors:
- a. Equipment
- b. Antenna System
- c. Operating Skills
- d. All three
Answer: d. All three
_______________________________________________________
2. What two types of energy fields make up a radio wave?
2. What two types of energy fields make up a radio wave?
Answer: Electric and Magnetic
_______________________________________________________
3. The polarization of a radio wave is determined by:
4. The strength of a radio wave:
5. What are the two major phenomena affecting radio propagation?
6. Ground Waves…
7. The Ionosphere returns HF radio waves back from the transmitter to the earth at a distance called the:
8. There are four layers in the ionosphere: F1, F2, E and D. Which one normally remains in place after sunset?
9. At VHF and UHF frequencies, long distance transmission beyond Line-of-sight, is possible due to what phenomenon?
3. The polarization of a radio wave is determined by:
Answer: The electric lines of force.
_______________________________________________________4. The strength of a radio wave:
- a. Increases as it spreads from the source.
- b. Decreases as it spreads from the source.
Answer: b.
_______________________________________________________5. What are the two major phenomena affecting radio propagation?
- Reflection
- Refraction
- Isolation
- Perturbations
- Both 3 & 4
- Both 2 & 3
- Both 1 & 2
Answer: 7.
_______________________________________________________6. Ground Waves…
- a. Travel farther at lower frequencies
- b. Travel farther at higher frequencies
Answer: a.
_______________________________________________________7. The Ionosphere returns HF radio waves back from the transmitter to the earth at a distance called the:
- a. Critical Angle
- b. Skip
Answer: b.
_______________________________________________________8. There are four layers in the ionosphere: F1, F2, E and D. Which one normally remains in place after sunset?
Answer: F1.
_______________________________________________________9. At VHF and UHF frequencies, long distance transmission beyond Line-of-sight, is possible due to what phenomenon?
Answer: Ducting
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