Ground Wave Radio Wave Propagation Quiz
1. What is the primary mechanism of ground wave propagation?
Reflection from the ionosphere
Diffraction around the Earth's curvature
Line-of-sight transmission
Scattering from atmospheric particles
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2. Which frequency range is most suitable for ground wave propagation?
3-30 MHz (HF band)
30-300 MHz (VHF band)
300 kHz - 3 MHz (MF band)
3-30 GHz (SHF band)
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3. What is the main factor that affects ground wave propagation distance?
Atmospheric temperature
Earth's magnetic field
Ground conductivity
Solar activity
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4. Why does ground wave propagation work better over seawater than over dry land?
Seawater has higher reflectivity
Seawater has higher conductivity
Seawater is smoother than land
Seawater absorbs less energy
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5. What is the typical maximum range for ground wave propagation over land?
10-50 km
100-200 km
500-1000 km
Over 2000 km
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6. Which of the following applications primarily uses ground wave propagation?
FM radio broadcasting
AM radio broadcasting
Satellite communications
Radar systems
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7. How does increasing frequency affect ground wave propagation?
Increases propagation distance
Decreases propagation distance
Has no effect on propagation distance
Makes propagation independent of ground conductivity
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8. What happens to the ground wave's electric field as it propagates?
It tilts forward
It becomes circularly polarized
It increases in magnitude
It becomes horizontally polarized
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9. Which component of the ground wave is most affected by ground conductivity?
Space wave
Surface wave
Direct wave
Reflected wave
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10. Why is ground wave propagation more reliable than skywave propagation during daytime for MF frequencies?
Ground waves are not affected by solar radiation
The D-layer absorbs MF skywaves during daytime
Ground waves have lower attenuation at night
Skywave propagation only works at VHF frequencies
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