RADIO THEORY

#1. Why is an X band weather radar used rather than a C band?

• AThe C band critical ray is too small.
• BThe C band sky ray is too weak.
• CC band wavelength is too long.
• DThe C band reflected ray is too weak.

#2. What is the First returning skywave called?

• AThe critical ray.
• BThe B-ray.
• CThe Wave.
• DThe sound wave.

#3. When does the maximum fading of an HF wave occur?

• AWhen the waves are more than 90 degrees out of phase.
• BWhen the waves are 90 degrees out of phase.
• CWhen the waves are in phase.
• DWhen the waves are 180 degrees out of phase.