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UAS Safety Certification - Chapter 3 Data Links questions with correct answers
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UAS Safety Certification - Chapter 3 DataLinks
1. When selecting datalink hardware an important factor that needs to be considered is ________. -
correct answer ✔✔Aircraft size
2. Prior to a flight, to make sure the air vehicle proceeds to a landing point, what do you need to do if a
lost link situation occurs? - correct answer ✔✔have a previously programmed lost communications flight
plan
3. Identify the term that best represents the following: a measure of the rate at which data is transmitted
over a communication channel, such as a serial cable or a wireless connection, typically expressed in bits
per second (bps). - correct answer ✔✔Baudrate
4. To determine the distance of a radio wavelength, measure ________. - correct answer ✔✔two
adjacent points on the wave
5. What type of datalink allows information to flow back and forth simultaneously, like a telephone? -
correct answer ✔✔duplex
6. What device on a UAS relays status information down to the ground control station (GCS) including
engine RPM, position information, altitude information, air speed, video images, and GPS data? - correct
answer ✔✔transmitter
7. Select two factors that influence your decision about the type of datalink hardware you purchase. -
correct answer ✔✔mission requirements, aircraft size
8. A broken uplink or downlink is defined as a ________. - correct answer ✔✔lost link
9. Absorption is defined as ________. - correct answer ✔✔radio waves consumed by an object
, 10. The U.S. government organization, ________ regulates communication made by radio, television,
satellite, and cable. - correct answer ✔✔Federal Communications Commission (FCC)
11. To reduce the risk of lost-link situations and to maintain communications integrity, ________. -
correct answer ✔✔have many redundant and backup systems
12. The purpose of a datalink is to ________. - correct answer ✔✔establish reliable communications
between the UAV and ground control station (GCS)
13. How many antennas are required to be mounted on the AV and located with the ground station for a
UAS using a transmitter and receiver configuration? - correct answer ✔✔Two, Two
14. Diffraction is defined as ________. - correct answer ✔✔radio waves bending and moving around an
object
15. The two most used types of antennas are ________. - correct answer ✔✔omni and directional
16. A carrier wave is defined as ________. - correct answer ✔✔an electromagnetic (EM) wave
modulated to convey a signal
17. Line of Sight (LOS) means that the radio wave will reach its destination if there are no obstacles in the
way and if the curvature of the earth is not blocking the signal. (T/F) - correct answer ✔✔true
18. Radio interference can be the result of ________. - correct answer ✔✔another user operating on the
same or similar band as the drone being flown
19. Antenna gain is the ________. - correct answer ✔✔resultant increase by amplitude of a signal
20. A datalink's strength or range can be limited by ________. - correct answer ✔✔environmental
factors, towers, distance, power, and antenna type
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