Modes of Propagation MCQ’s

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This set of Antenna Multiple Choice Questions & Answers (MCQs) focuses on “Modes of Propagation”.

1. In a ground wave propagation, which component of electric field is short circuited when it’s in contact by earth?
a) Horizontal
b) Vertical
c) Both horizontal and vertical
d) Neither horizontal nor vertical

2. During ground wave propagation earth behaves like a __________
a) Leaky capacitor
b) Leaky Inductor
c) Series combination of capacitor and inductor
d) Parallel combination of capacitor and inductor

3. Up to which frequency the ground wave propagation is used?
a) 2MHz
b) 2GHz
c) 30MHz
d) 30GHz

4. Sky wave propagation reflects the frequencies ___________
a) 2MHz
b) 2 MHz to 30MHz
c) 2 GHz to 30 GHz
d) 30 GHz to 50GHz

5. Space wave propagation reflects the waves with frequencies _________
a) Below 2 GHz
b) 2 to 30MHz
c) Above 30GHz
d) Above 30MHz

6. Communication through LOS can be increased by decreasing the height of antenna.
a) True
b) False

7. At what distance the sky wave propagation is present from the earth surface?
a) 50 to 400km
b) Below 50 km
c) 600 to 750km
d) 50 to 400 m

8. Space wave propagates at which frequency band?
a) VHF
b) HF
c) MF
d) EHF

9. In which of the following mode of propagation the waves are guided along the surface of the earth?
a) Ground wave
b) Sky wave
c) LOS
d) Space wave

10. In which of the following modes of propagation the ionosphere acts as the reflecting surface for the waves?
a) Ground wave
b) Sky wave
c) Space wave
d) LOS

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