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Communications Engineering Exam 5: ECE Pre-Board – Answers

(Last Updated On: March 25, 2020)

Communications Engineering Mastery Test 5: ECE Pre-Board

Below are the answers key for the 100 items set of Practice Examination 5 in Communications Engineering composed of previous Board Exams Questions and cautiously selected questions from various topics in Communications Engineering (Electronics Systems and Technology) that could possibly be given in the board.

1. Two or more antennas operating on the same frequency

2. Antenna gain

3. Base station

4. High power

5. X

6. C

7. Saturation

8. Center of the antenna

9. By installing a good ground radial system

10. Around 500 miles

11. Efficiency = radiation resistance/total resistance x 100%

12. Aural broadcast STL

13. Snell’s

14. 156.8 MHz

15. Gateway

16. Telecommand

17. A variable LC oscillator with metered feedback current

18. A3E and F3C

19. In terms of peak envelop power

20. 0 degrees latitude

21. loading coil

22. The frequency range over which and antenna can be expected to perform well

23. TDMA

24. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station.

25. At feed point

26. Whip

27. Carrier power

28. Sunspots

29. A3E

30. Franchise

31. 200 kHz

32. FM

33. A non-radiating load for a transmitter used for testing

34. Bidirectional

35. Global beam

36. Gaussian minimum shift keying

37. Laser

38. Communication

39. Velocity factor

40. Circulator

41. Slope overload

42. Space station

43. 0.31250 GHz

44. Transmission system engineering

45. LAN

46. Land station

47. The combination of two signals to produce sum and difference frequencies.

48. Amplitude modulation

49. Thermal agitation

50. Horizontal aiming of the antenna

51. The time required to complete one cycle

52. Throughput

53. 42.5%

54. Stack

55. The element fed by the transmission line

56. Peak limiting

57. Radiation

58. Drift

59. 10100

60. 4:1

61. Frequency

62. V.1

63. Reduced carrier single sideband emission

64. Phonoscope

65. 50 kW

66. 110011

67. Iridium system

68. Modulator

69. Down link

70. Violet

71. Resonant

72. Broadcast

73. Maximum voltage and minimum current.

74. Synchronous optical network

75. Through installing a band-pass filter in the antenna feed line

76. Tropospheric ducting

77. Longer it can reach

78. 40 dB

79. The electric field is parallel to the earth

80. Television

81. Decrease the receiver squelch, gain.

82. Optical repeater

83. Low noise amplifier

84. Facsimile

85. Crossfire

86. In the receiver front end

87. Synchronous data transfer scheme

88. Vestigial sideband

89. 8.36 kW

90. Class C

91. E.O. 109

92. Mixer

93. 20 Hz

94. A wave consisting of an electric field and a magnetic field at right angles to each other.

95. 3.4 to 6.424 GHz

96. Packet mode

97. Yagi antenna

98. A circuit for detecting FM signals

99. Terminal adapters

100. Department of transportation and communications

What’s next in line?

Complete List of Communications Engineering Exams: ECE Pre-Board

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