UNITED24 - Make a charitable donation in support of Ukraine!

Military

SS0002 Practice Exercise 1
Introduction to Tactical Radio Communications Theory

Instructions The following items will test your understanding of the material covered in this lesson. There is only one correct answer for each item. When you have completed the exercise, check your answers with the answer key that follows. If you answer any item incorrectly, review that part of the lesson which contains the portion involved.

Situation: You are conducting training on basic radio and antenna theory.
1. Which of the following types of waves is most likely to be affected by sunspots?

A. Sky-waves.
B. Ground waves.
C. Direct waves.
D. Line of sight waves.
2. Which of the following statements about AM/SSB radios is NOT true?

A. AM/SSB provides greater reliability than AM/DSB.
B. AM/SSB systems are larger and heavier than AM/DSB systems.
C. AM/SSB systems provide increased output without increasing antenna voltage.
D. AM/SSB systems can operate over longer ranges without loss of intelligence due to selective fading.
3. You are constructing a long-wire antenna three wavelengths long to communicate on a channel frequency of 29.274 MHz. How long should you make your antenna?

A. 50.0 feet.
B. 50.4 feet.
C. 100.0 feet.
D. 100.8 feet.
4. You are in the field and one of your antenna insulators has broken. Which of the following items will make the best replacement?

A. A shoelace.
B. A tree branch.
C. A plastic shirt button.
D. The top from a soft drink can.