| 1. | Radiotelephone is one of the most useful military communications methods. Because of its directness, convenience, and ease of operation, ships, aircraft, and shore stations use radiotelephone. |
| | True |
| | False |
| 2. | Facsimile (fax) is the process used to transmit photographs, charts, and other graphic information electronically. |
| | True |
| | False |
| 3. | A Set consists of a unit or units and the assemblies, subassemblies, and parts connected or associated together to perform a specific function. |
| | True |
| | False |
| 4. | A Group consists of two or more parts that form a portion of an assembly or a unit. It is replaceable as a whole, but some of its parts are individually replaceable. |
| | True |
| | False |
| 5. | Tactical communications are usually limited to a specific area of operations and are used to direct or report the movement of specific forces. |
| | True |
| | False |
| 6. | The purpose of audio reproduction devices, such as loudspeakers and headphones, is to convert electrical audio signals to sound power. |
| | True |
| | False |
| 7. | What does figure 2-28 illustrate about?
(Refer Pg 2-29) |
| | Multiple crystal frequency synthesizers |
| | Simple crystal frequency synthesizer |
| | Permanent magnet speaker |
| | None of the above |
| 8. | Synchronous teletypewriter operation does not in all cases have to rely upon elements of the transmitted character to maintain proper position in relation to the receiving device. |
| | True |
| | False |
| 9. | The Navy uses two basic radio teletypewriter (ratt) systems. These are the TONE-MODULATED SYSTEM, referred to as audio-frequency tone shift (afts), and the CARRIER-FREQUENCY SHIFT SYSTEM, referred to as radio-frequency-carrier shift (rfcs). |
| | True |
| | False |
| 10. | Cryptographic equipment is used to ENCRYPT and DECRYPT tty messages that require security handling. (Encrypting is the method used to code a transmitted message; decrypting is used to decode a received message.) |
| | True |
| | False |
| 11. | Radio-frequency (rf) transmitting systems with high-power transmitting tubes and high-gain antennas have increased the possibility of injury to personnel working in the vicinity. |
| | True |
| | False |
| 12. | Transmitter transfer switchboards transfer receiver audio outputs to remote control station audio circuits. |
| | True |
| | False |
| 13. | Words-per minute is an approximate rate of speed. It means the number of five letter words with a space between them that can be transmitted or received in a one-minute period. |
| | True |
| | False |
| 14. | . What does figure 4-1 illustrate about?
(Refer Pg 4-3) |
| | Satellite communications system |
| | FM transmitter |
| | Elliptical satellite orbit |
| | None of the above |
| 15. | An equipment that compares incoming signals and selects the strongest to be fed to a teletypewriter through a patch panel is called Comparator. |
| | True |
| | False |
| 16. | Lasers take energy at (or near) the visible light spectrum and convert it to a very narrow and intense beam in the same region. |
| | True |
| | False |
| 17. | A transceiver consists of a transmitter and a receiver that share common circuits and is housed in the same case or cabinet. |
| | True |
| | False |
| 18. | What does NTDS mean? |
| | Naval Tactical Data System |
| | Naval Transmission Data System |
| | Naval Technical Data Storage |
| | None of the above |
| 19. | The availability of a satellite to act as a relay station between two earth terminals depends on the locations of the earth terminals and the orbit of the satellite. |
| | True |
| | False |
| 20. | Limitations of a satellite communications system are determined by the technical characteristics of the satellite and its orbital parameters. |
| | True |
| | False |
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