Communications Engineering Exam 9: ECE Pre-Board – Answers

(Last Updated On: March 25, 2020)

Communications Engineering Mastery Test 9: ECE Pre-Board

Below are the answers key for the 100 items set of Practice Examination 9 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. Timbre

2. 3300 m/s

3. 20 phons

4. 2λ to 8λ

5. 3100 kHz

6. 800

7. Effective Isotropic Radiated Power (EIRP)

8. Effective Radiated Power (ERP)

9. Gain-to-Equivalent Noise Temperature Ratio (G/Te)

10. Space noise

11. Hoghorn

12. 24

13. Space Division Multiplexing (SDM)

14. T2 carrier system

15. Metric

16. Spin stabilization

17. Membrane absorber

18. Syncom III

19. Calculate load admittance

20. A specially configured coaxial transmission line

21. Emission

22. 1887

23. Attenuation of radio wave

24. A parallel LC circuit

25. Courier

26. RA 9292

27. The President

28. 5

29. Within 15 days

30. 1

31. All of the choices

32. Solid

33. 1

34. Both A and C above

35. A 125-μs frame

36. L carrier

37. 564 – 3084 kHz

38. Dual polarization

39. 39.2 dB

40. 1.09

41. 275 ms

42. 0.5 s

43. 128

44. 5.4 MHz

45. 0.871 μW

46. 4 MHz

47. 4130 km

48. F2 layer

49. 47

50. 1.6 octaves

51. 3 times

52. 44.736

53. 358

54. Superrefraction

55. Temperature inversion

56. Duct

57. 1.35 cm and 1.7 mm

58. 5 mm and 2.5 mm

59. Ionosonde

60. 1100 km

61. 11.53 m/s

62. 343 m/s

63. 120 Hz

64. 320 kHz

65. D

66. Refraction

67. Using the smallest possible radiation angle and highest possible frequency

68. 32 km

69. 3853 Hz

70. NTT

71. 0.704 fF

72. Transponder

73. 35.3

74. Critical frequency

75. Frequency response

76. water vapor and oxygen

77. either elliptical or circular

78. Employment of highly directional spot-beam antennas

79. footprint

80. 440 Hz

81. 435

82. lower

83. 39.7 W

84. IS-95

85. 31.5 W

86. 10 Base T

87. 150 W

88. PD 576-A

89. 37.6 W

90. 13 kbps

91. 126 W

92. MC No. 2-05-88

93. 60 W

94. Hash

95. Twisted pair

96. EDGE

97. 12:00 Midnight to 5:00 AM

98. public-key encryption

99. 8 kbps

100. 7:8

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Complete List of Communications Engineering Exams: ECE Pre-Board

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