ARRL Day 4.txt

  1. Which of the following is common practice during net operations to get the immediate attention of the net control station when reporting an emergency?



    A.
  2. When may an amateur station use any means of radio communications at its disposal for essential communications in connection with immediate safety of human life and protection of property?



    D.
  3. What should you do to minimize disruptions to an emergency traffic net once you have checked in?



    D.
  4. What set of rules applies to proper operation of your station when using amateur radio at the request of public service officials?



    B.
  5. What is the Radio Amateur Civil Emergency Service?



    B.
  6. What do RACES and ARES have in common?



    D.
  7. What is the preamble in a formal traffic message?



    A.
  8. What is usually considered to be the most important job of an amateur operator when handling emergency traffic messages?



    D.
  9. What is meant by the term "check" in reference to a formal traffic message?
    A. The check is a count of the number of words or word equivalents in the text portion of the message
    B. The check is the value of a money order attached to the message
    C. The check is a list of stations that have relayed the message
    D. The check is a box on the message form that tells you the message was received
    A
  10. What is a usual name for electromagnetic waves that travel through space?



    D. Pressure waves
    B.
  11. What is the radio horizon?



    A.
  12. Why do VHF and UHF radio signals usually travel somewhat farther than the visual line of sight distance between two stations?
    A. Radio signals move somewhat faster than the speed of light
    B. Radio waves are not blocked by dust particles
    C. The Earth seems less curved to radio waves than to light
    D. Radio waves are blocked by dust particles
    C
  13. What is meant by the term "knife-edge" propagation?



    D.
  14. What mode is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis?



    A.
  15. What causes "tropospheric ducting"?



    C.
  16. What is a characteristic of VHF signals received via auroral reflection? . Signals from distances of 10,000 or more miles are common
    B. The signals exhibit rapid fluctuations of strength and often sound distorted
    C. These types of signals occur only during winter nighttime hours
    D. These types of signals are generally strongest when your antenna is aimed to the south (for stations in the Northern Hemisphere)
    B
  17. What band is best suited to communicating via meteor scatter?



    A.
  18. Which part of the atmosphere enables the propagation of radio signals around the world?



    B.
  19. Which of the following might be happening when VHF signals are being received from long distances?



    D.
  20. What is generally the best time for long-distance 10 meter band propagation?



    D.
  21. Which of the following is a common effect of "skip" reflections between the Earth and the ionosphere?



    B.
  22. Which of the following propagation types is most commonly associated with occasional strong over-the-horizon signals on the 10, 6, and 2 meter bands?
    A. Backscatter
    B. Sporadic E
    C. D layer absorption
    D. Gray-line propagation
    B
  23. Why are "direct" (not via a repeater) UHF signals rarely heard from stations outside your local coverage area?
    A. They are too weak to go very far
    B. FCC regulations prohibit them from going more than 50 miles
    C. UHF signals are usually not reflected by the ionosphere
    D. They collide with trees and shrubbery and fade out
    C
  24. What is the cause of irregular fading of signals from distant stations during times of generally good reception?



    A.
  25. What is the FCC Part 97 definition of a space station?



    D.
  26. Which amateur stations may make contact with an amateur station on the International Space Station using 2 meter and 70 cm band amateur radio frequencies?



    C.
  27. Which of the following can be done using an amateur radio satellite?



    C.
  28. What do the initials LEO tell you about an amateur satellite?



    C.
  29. What can be used to determine the time period during which an amateur satellite or space station can be accessed?



    C.
  30. What is a satellite beacon?



    D.
  31. What causes "spin fading" when referring to satellite signals?



    C.
  32. With regard to satellite communications, what is Doppler shift?



    A.
  33. What is meant by the statement that a satellite is operating in "mode U/V"?



    C.
  34. How much transmitter power should be used on the uplink frequency of an amateur satellite or space station?



    C.
  35. What is the FCC Part 97 definition of telemetry?



    C.
  36. What is the FCC Part 97 definition of telecommand?



    D.
Author
mwinstom
ID
268609
Card Set
ARRL Day 4.txt
Description
ARRL
Updated