Radio Propagation and Noise Characteristics MCQ’s

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This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Radio Propagation and Noise Characteristics”.

1. The ratio of terminating impedance to the power density of the incident wave is called as?
a) Maximum effective aperture
b) Maximum allowable power
c) Directivity
d) Gain

2. The factor by which a receiver fails to reach the theoretical internal noise limit is known as ________
a) Noise factor
b) Noise
c) Coefficient of noise
d) Noise figure

3. Received radio energy is a function of the area of the receiving antenna.
a) True
b) False

4. What is the maximum limit on the frequency that can be used for ground wave communication?
a) 6MHz
b) 2MHz
c) 5MHz
d) 3MHz

5. Why can we not use sky waves for navigation?
a) Low power
b) More noise
c) Unpredictable path
d) Not economical

6. The propagation velocity is not constant in ground waves.
a) True
b) False

7. What type of polarization is used for ground waves?
a) Vertical polarization
b) Right circular polarization
c) Horizontal polarization
d) Left circular polarization

8. Ground waves are not adversely affected by which of the following factors?
a) Conductivity of earth
b) Dielectric of earth
c) Lightning strikes
d) Day/night changes

9. The effect of signal simultaneously taking different paths to reach the receiver is called as _______
a) Multipath effects
b) Differential path effects
c) Propagation noise
d) Atmospheric distortion

10. ______ is the error in determining position relative to an earth referenced coordinate system?
a) Absolute error
b) Repeatable error
c) Relative error
d) Differential error

11. The method in which the user’s receiver and the reference station are assumed not to be synchronized in time is called as _______
a) Redundancy method
b) Pseudoranging
c) Integrity method
d) Differential method

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