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. 55Ëš
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. 166.5Ëš
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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