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Space-Wave Propagation MCQs

Practice Space-Wave Propagation MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Antenna & Wave PropagationSpace-Wave Propagation

Line-of-sight or space-wave propagation is especially important at?

  • AVHF and higher frequencies
  • BOnly very low frequency
  • CDC
  • DAudio frequency
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Correct Answer: A. VHF and higher frequencies
Explanation: At VHF, UHF and microwave frequencies, propagation is predominantly line-of-sight or space-wave because ionospheric return is generally not the normal mode.
Reference: Standard antenna and wave propagation: space-wave propagation
Question 2
Antenna & Wave PropagationSpace-Wave Propagation

If transmitting and receiving antenna heights are increased, the radio line-of-sight range generally?

  • AIncreases
  • BDecreases to zero
  • CRemains exactly unchanged
  • DBecomes independent of Earth curvature
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Correct Answer: A. Increases
Explanation: Increasing antenna heights extends the geometric/radio horizon and therefore generally increases line-of-sight range.
Reference: Standard antenna and wave propagation: space-wave propagation
Question 3
Antenna & Wave PropagationSpace-Wave Propagation

Which propagation mode is normally most appropriate for a terrestrial microwave point-to-point link?

  • ALine-of-sight space-wave propagation
  • BGround wave around the entire Earth
  • CIonospheric sky wave as the primary mode
  • DConduction through soil
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Correct Answer: A. Line-of-sight space-wave propagation
Explanation: Terrestrial microwave links generally use highly directional antennas and line-of-sight space-wave propagation.
Reference: Standard antenna and wave propagation: space-wave propagation