| 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.
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True |
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False |
| 2. |
Facsimile (fax) is the process used to transmit photographs, charts, and other graphic information electronically.
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True |
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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. |
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True |
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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. |
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True |
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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. |
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True |
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False |
| 6. |
The purpose of audio reproduction devices, such as loudspeakers and headphones, is to convert electrical audio signals to sound power. |
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True |
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False |
| 7. |
What does figure 2-28 illustrate about?
(Refer Pg 2-29)
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Multiple crystal frequency synthesizers |
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Simple crystal frequency synthesizer |
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Permanent magnet speaker |
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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.
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True |
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False
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| 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). |
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True |
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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.) |
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True |
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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. |
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True |
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False |
| 12. |
Transmitter transfer switchboards transfer receiver audio outputs to remote control station audio circuits. |
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True |
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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.
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True |
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False |
| 14. |
. What does figure 4-1 illustrate about?
(Refer Pg 4-3)
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Satellite communications system |
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FM transmitter |
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Elliptical satellite orbit |
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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.
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True |
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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.
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True |
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False |
| 17. |
A transceiver consists of a transmitter and a receiver that share common circuits and is housed in the same case or cabinet. |
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True |
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False |
| 18. |
What does NTDS mean? |
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Naval Tactical Data System |
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Naval Transmission Data System |
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Naval Technical Data Storage |
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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. |
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True |
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False |
| 20. |
Limitations of a satellite communications system are determined by the technical characteristics of the satellite and its orbital parameters. |
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True |
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False |
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