Communications Engineering Exam 7: ECE Pre-Board – Answers

Below are the answers key for the 100 items set of Practice Examination 7 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. 14.14 mi

2. 25 mi

3. 179 dB

4. 6.065 GHz

5. 72 Mbps

6. 4 MHz

7. 36 MHz

8. 500 MHz

9. 5.925 GHz

10. 12

11. X band

12. L

13. Ku

14. TTC

15. Attitude control subsystem

16. 40 MHz

17. 14 to 14.5 GHz

18. Iridium

19. Polar

20. L band

21. 2400

22. GPS

23. 10,898 nmi

24. 12 h

25. Ephemeris

26. 55˚

27. PVC

28. 2.27

29. teflon

30. 301 Ω

31. 50 Ω

32. 0.1

33. 0.219 ft

34. 0.82 ft

35. PL-259

36. BNC

37. F-type connector

38. N-type connector

39. 0.5 to 0.9

40. 0.6 to 0.8

41. 0.9

42. Twin-lead

43. 0.68

44. 75 ns

45. Delay line

46. 115.6 ns

47. 166.5˚

48. 93 Ω

49. 116.8 nH/ft

50. Either A or C

51. Cognitive

52. Rhythm

53. Speech

54. Simple

55. 40 dB

56. 4

57. interval

58. 2 to 1

59. 106

60. 5th, 6th and 7th

61. 4 times louder

62. 6 to 10 dB

63. 80 dB

64. Echo

65. Transmission loss

66. 76 kHz

67. 15.6 dB

68. 3.2 x 10-4 W/m2

69. 1 x 10-7W/m2

70. 14.5 dB

71. 10.5 dB

72. Very loud

73. 150 dB

74. 114 dB

75. 3300

76. 1.6 to 1.8 s

77. 3.1

78. Reverberation

79. Helmholtz resonator

80. 1250

81. 30

82. 16.28

83. -1.25 dB

84. 49

85. 7.04°

86. 4.4 MHz

87. 9.1 W

88. James C. Maxwell

89. . Polarization

90. Troposcatter

91. 0°

92. 112 Ω

93. Ultrasonic

94. 30.72 kHz

95. 618

96. 11.07

97. 10 – 1000 microwatts

98. 5.6

99. 11.16

100. 40

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• Communications Engineering Exam 8: ECE Pre-Board

Complete List of Communications Engineering Exams: ECE Pre-Board