Radio Propagation

Which one of these is NOT a type of radio propagation?

• Sky Wave

• Line of Sight

• Skip Zone

• Ground Wave

What is a Hertz?

• One hop per second

• One cycle per minute

• One cycle per second

• One hop per minute

Which of these ionosphere layers disappears at sunset?

• B Layer

• D Layer

• F Layer

• All of the above

When does the process of ionization occur?

• During daylight

• During hours of darkness

• During night and day

• During radio transmission

When does Attenuation occur the most?

• At sunrise

• At the lowest frequencies

• At the time of broadcast

• At high frequencies

How would you describe a 'Unity Gain' antenna?

• Transmits power horizontally

• Transmits power along the earth surface

• Transmits power in all directions

• Transmits power vertically

Why is Hyperbolic position fixing more accurate nearer the base line?

• Angle of Cut of position lines

• Better coverage

• Gradients are smallest

• All of the above

What is a Skip Distance?

• Distance between transmission point of Skywave and transmission point of Groundwave

• Distance between transmission point of Groundwave and reception point of Groundwave

• Distance between transmission point of Skywave and reception point of Skywave

• Distance between reception point of Groundwave and reception point of Skywave

Which Skywave frequency will not reflect, passing straight through the Ionosphere?

• Above 30 MHz

• Below 10 MHz

• Above 100 KHz

• Below 100 KHz

Which ionospheric layer is most suitable for reflecting a one-hop Skywave?

• E

• F1

• F2

• D