Chapter 12, Sections A

Question 1

1. Two types of fields exist in a radio transmitting antenna to cause it to radiate electrical energy. They are
   A.
   B.

Answer 1

An electric field
An magnetic field

Question 2

2. The higher the frequency, the _____ (longer or shorter) the wavelength

Answer 2

Shorter

Question 3

3. The frequency of a radio transmission indicates the number of electromagnetic field ____ that occur in ____ second.

Answer 3

Oscillations
One

Question 4

4. Each oscillation is called a ____ and frequency is measured in ____ per second or ____

Answer 4

Cycle
Cycles
Hertz (Hz)

Question 5

5. Radio waves travel at the speed of ____

Answer 5

Light

Question 6

6. A(n) ____ to wave is necessary to transmit radio waves and antennas are usually ____ to ____ the length of the transmitted wave.

Answer 6

Carrier
One-quarter
Onehalf

Question 7

7. In order to transmit information, the ____ wave must be altered in some way and this alteration is called ____

Answer 7

Carrier
Modulation

Question 8

8. There are two ways a radio carrier wave may be modulated, these are:
   A.
   B.

Answer 8

Amplitude Modulation (AM)
Frequency Modulation (FM)

Question 9

9.___ (What type) waves bounce off the ionosphere and can be used to achieve ___-___ radio transmissions.

Answer 9

sky, long-range

Question 10

10. The three basic functions of every radio transmitter are:
    A.
    B.
    C.

Answer 10

a. generate a signal at the correct frequency
b. modulate the carrier wave
c. amplify the signal

Question 11

11. The component that generates the carrier wave at the correct frequency is called a(n)

Answer 11

11. oscillator

Question 12

12. A component found in both transmitters and receivers whose function is to increase the strength of a signal is called a(n) ____

Answer 12

12. amplifier

Question 13

13. The length of a transmitting antenna is determined by the frequency (wavelength) for which the antenna is used. The higher the frequency, the ____ (shorter or longer) the antenna.

Answer 13

13. shorter

Question 14

14. A half-wave antenna may also be referred to as (an) ____ antenna.

Answer 14

14 Hertz dipole

Question 15

15. The metal surrounding the base of a Marconi monopole antenna is called the ____

Answer 15

15. ground plane

Question 16

16. Aircraft VHF communications antennas are ____ (horizontally or vertically) polarized.

Answer 16

16. vertically

Question 17

17. A(n) ____circuit is used to isolate the desired frequency from all the frequencies intercepted by an antenna.

Answer 17

17. tuning

Question 18

18. High Frequency (HF) radios are most commonly used by large aircraft for ____ (general, oceanic or continental) Air Traffic Control communications.

Answer 18

18. oceanic

Question 19

19. Most civilian aviation radio communication is done in the ___ (UHF or VHF)
    frequency range.

Answer 19

19. VHF

Question 20

20. VHF communications and navigation equipment ____ (is or is not) limited to an operating distance equivalent to the line of sight distance.

Answer 20

20. is

Question 21

21. SATCOM radios operate in the ____ (VHF or UHF) frequency range and can carry both
    And ____ communications.

Answer 21

21. UHF, voice, data

Question 22

22. A special VHF/HF communications system for calling a single, specific air carrier aircraft is known as ____

Answer 22

22. SELCAL

Question 23

23. ACARS is a system for transmitting routine operational, maintenance and administrative messages to airliners via a ____

Answer 23

23. digital data link

Question 24

24. ADF refers to the ___ (airborne or ground) equipment and NDB refers to the associated ___ (airborne or ground) equipment.

Answer 24

24. airborne, ground

Question 25

25. ADF operates in the ___ [LF/MF or VHF/UHF) frequency range

Answer 25

25. LF/MF

Question 26

26. The two antennas required for the operation of an ADF are: A. B.

Answer 26

26. a. loop b. sense

Question 27

27. VOR operates in the ___ (VHF or UHF) frequency range.

Answer 27

27. VHF

Question 28

28. VOR is a ___ (phase or voltage) comparison system.

Answer 28

28. phase

Question 29

29. VOR navigation radios used for IFR operations must be checked for accuracy every ___ days

Answer 29

30

Question 30

30. Distance measuring equipment ___ (is or is not) a form of pulse equipment.

Answer 30

30. is

Question 31

31. The principal advantage of an area navigation system is that it allows a pilot to fly ___

Answer 31

31. direct to a destination

Question 32

32. An RNAV must be tuned to a ___ (VOR or VORTAC) station to operate properly.

Answer 32

32. VORTAC

Question 33

33. Inertial navigation systems ___ (do or do not) require an external radio signal.

Answer 33

33. do not

Question 34

34. INS systems operate by very accurate measurement of ___ forces.

Answer 34

34. acceleration

Question 35

35. GPS is a ___ (ground or space)-based navigation system.

Answer 35

35. space

Question 36

36. In order to determine an aircraft's position and altitude, the GPS system must receive a minimum of ___ signals.

Answer 36

four

Question 37

37. It is possible for a pilot to respond with any of ___ [how many) codes on a mode A/3 radar beacon transponder.

Answer 37

4096

Question 38

38. Altitude information is transmitted froni a radar bouen transponder when it is operating in Mode ____ (A or C)

Answer 38

38. C

Question 39

39. If two aircraft with operational Mode S transponders and ___ systems are on a collision course the systems communicate with each other and present each pilot with guidance to ____

Answer 39

39. TCAS, resolve the potential conflict

Question 40

40. Transponders must be tested and inspected every ___ calendar months.

Answer 40

24

Question 41

41. The four ground-based components of the ILS are: A. B. C. D.

Answer 41

41. a. localizer b. glideslope c. marker beacons d. approach and runway lighting

Question 42

42. The glide-slope transmitter operates in the ___ (VHF or UHF) frequency range.

Answer 42

UHF

Question 43

43. Tuning to the desired localizer frequency automatically tunes the ____ (marker beacon or glide slope) receiver to the proper frequency.

Answer 43

43. glideslope

Question 44

44. A marker beacon uses a single-frequency transmitter with (an) ____ carrier frequency.

Answer 44

44. 75MHz

Question 45

45. The amber light on the marker beacon receiver will light up when the aircraft passes over the ___ (outer or middle) marker.

Answer 45

45. middle

Question 46

46. An emergency locator transmitter is designed to transmit for ___ hours and operates on ___ MHz and ___MHz

Answer 46

48, 121.5, 243.0

Question 47

47. Cockpit Voice Recorders and Flight Data Recorders are normally installed in the ___ (forward or aft) fuselage area

Answer 47

aft

Question 48

48. Basic weather radar signals are reflected only by the ___ (clouds or rain) inside the storm.

Answer 48

rain

Question 49

49. Fill in the color that is used on a color weather radar to indicate the intensity of the rainfall: a. Least severe b. Medium severity c. Most severe

Answer 49

49. a. green b. yellow c. red

Question 50

50. ___ (X-hand or C-band) radar is more common in general aviation airplanes.

Answer 50

X-band

Question 51

51. ___ (X-band or C-band) radar is better for penetrating known areas of precipitation.

Answer 51

C-band

Question 52

52. A Stormscope detects the radio waves emitted by ___

Answer 52

Lightning discharges

Question 53

53. A major disadvantage of TCAS systems is that they cannot detect aircraft that do not have operating ___.

Answer 53

Transponders