Radio Wave Propagation MCQ

Test your knowledge with important Radio Wave Propagation MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Radio Wave Propagation MCQs at Bissoy

• Relation between transmission coefficient γt and reflection coefficient is γr is
  ক

  γr= γt-1

  খ

  γr= γt+1

  গ

  γr= γt-2

  ঘ

  γr= (γt-1) / γt+1
• The effective radius of earth is how many times the actual radius of earth at standard atmospheric conditions?
  ক

  3/4

  খ

  4/3

  গ

  1/4

  ঘ

  1/3
• The field strength of the surface wave of flat earth is given by ____
  ক

  E=AE0/d

  খ

  E=AE0/λ

  গ

  E=dE0/A

  ঘ

  E=λE0/A
• Spatial attenuation coefficient is given by ____
  ক

  (4πd/λ)2

  খ

  (4πλ/d)2
• What is the condition of roughness of earth for earth to be electrically smooth?
  ক

  R < 0.1

  খ

  R > 10

  গ

  R > 0.1

  ঘ

  R > 1
• The field strength of the wave at a unit distance from transmitting antenna depends on _____
  ক

  only the power radiated by the transmitting antenna

  খ

  only on the power received by the receiving antenna

  গ

  only on directivity of antenna in vertical and horizontal planes

  ঘ

  both on the power radiated by the transmitting antenna & directivity in vertical and horizontal planes
• The electric field of the component increases in ground wave when it tilts more at the surface.
  ক

  True

  খ

  False
• How the ground wave losses vary with high frequencies?
  ক

  Increases

  খ

  Decreases

  গ

  Does not depend on frequency

  ঘ

  Increase or decrease
• Which of the following propagates by gliding over the surface of earth?
  ক

  Surface wave

  খ

  Tropospheric wave

  গ

  Ionospheric wave

  ঘ

  Stratospheric waves
• Which of the following is particularly used for VLF?
  ক

  Surface wave

  খ

  Tropospheric wave

  গ

  Ionospheric wave

  ঘ

  Stratospheric waves
• The ground wave propagation uses horizontal polarized antennas
  ক

  True

  খ

  False
• Ground wave propagation is also known as _________
  ক

  Surface wave

  খ

  Tropospheric wave

  গ

  Ionospheric wave

  ঘ

  Stratospheric waves
• The broadcast signals received at low frequencies during day-time are due to _________
  ক

  Ground wave

  খ

  Space wave

  গ

  Sky wave

  ঘ

  Tropospheric waves
• Ground wave propagation is used for signals up to frequency __________
  ক

  2MHz

  খ

  2GHz

  গ

  30MHz

  ঘ

  30GHz
• Ground wave is always __________ polarized.
  ক

  Vertically

  খ

  Horizontally

  গ

  Either vertical or horizontal

  ঘ

  Neither horizontal nor vertical
• Which of the following layer is known as F layer?
  ক

  Appleton layer

  খ

  Kennelly Heaviside layer

  গ

  Absorption layer

  ঘ

  Sir Appleton
• Which of the following layer is known as absorption layer for short waves?
  ক

  E layer

  খ

  F1 layer

  গ

  F2 layer

  ঘ

  D layer
• Which of the following is formed by the ionization of UV and corpuscular radiations?
  ক

  E layer

  খ

  F1 layer

  গ

  F2 layer

  ঘ

  D layer
• Which of the following layer is used for long distance sky wave propagation during night hours?
  ক

  F layer

  খ

  E layer

  গ

  D layer

  ঘ

  All layers can be used
• Which of the following regions are present in the night time?
  ক

  D and E layers

  খ

  E and F layers

  গ

  F1 and F2 layers

  ঘ

  D and F layers
• Which of the following follows Chapman’s law of variation?
  ক

  D layer

  খ

  F1 layer

  গ

  F2 layer

  ঘ

  Both F1 and F2 layer
• In which of the following layers the electron density is high?
  ক

  E layer

  খ

  F1 layer

  গ

  F2 layer

  ঘ

  D layer
• Which of the following is called as Kennelly Heaviside layer?
  ক

  E layer

  খ

  F1 layer

  গ

  F2 layer

  ঘ

  D layer
• Which of the following layer disappears during night time in ionosphere?
  ক

  D layer

  খ

  E- layer

  গ

  F1 layer

  ঘ

  F2 layer
• Which of the following is the nearest Ionospheric layer to the earth surface?
  ক

  D layer

  খ

  E layer

  গ

  F1 layer

  ঘ

  F2 layer
• At what height the Ionosphere lies above the earth surface?
  ক

  70-400km

  খ

  2-15km

  গ

  20-70km

  ঘ

  Above 400km
• Troposphere scatter propagation is used for point to point communication
  ক

  True

  খ

  False
• The region between the top of troposphere and start of stratosphere is called ____
  ক

  tropopause

  খ

  stratopause

  গ

  ionosphere

  ঘ

  region of calm
• Which of the following is the nearest region from the earth surface in the atmosphere?
  ক

  Troposphere

  খ

  Stratosphere

  গ

  Ionosphere

  ঘ

  Outer atmosphere
• Which of the following is a property of troposphere?
  ক

  Temperature decreases with increase in height

  খ

  Temperature increases with increase in height

  গ

  Gas components don’t remain in constant percentage with increase in height

  ঘ

  Water vapor components remain same with height