Below are the answers key for the 100 items set of Practice Examination 6 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. 150 watts
2. During experimental period
3. High VHF band
4. DC and RF heating of resistors, causing then to change values.
5. E
6. Mobile radio
7. Carrier
8. 100 times bigger
9. Helical
10. Pulse generator laser
11. com
12. An equivalent resistance that would dissipate the same amount of power as that radiated from an antenna
13. Back wave
14. Immunity to noise
15. Photovoltaic effect
16. Telstar I
17. 30 to 300 GHz
18. Suppressed white noise
19. Secondary
20. F
21. Computer data
22. 401.00625 MHz
23. 80,000 watts
24. Clear to send
25. 0% modulation
26. Radio operator telegraphy onboard
27. Binary form
28. Necessary bandwidth
29. Local oscillator
30. One at a time
31. Loose connections in the oscillator, amplifier, or antenna circuits.
32. Antenna
33. Mean power
34. 235.50 MHz
35. 8
36. video stage gain
37. 6 dB
38. gov
39. Dept. order 88
40. UHF band
41. Four
42. Electromagnetic
43. 1.0025 MHz
44. Dynamic instability
45. Transmitter, channel and receiver
46. CCIR
47. Call waiting tone
48. Bandwidth
49. 401.0125 MHz
50. Closer coupling between the oscillator and the antenna.
51. Double sideband full carrier
52. 405.050 MHz
53. Value-added service provided
54. Two way simultaneous transmission
55. A
56. Balun
57. Contrast
58. Mu-law
59. Type of modulation of the main carrier
60. NTC
61. Antenna efficiency
62. MF band
63. Dielectrics in the line
64. Uniform resource locator
65. Spark emission
66. Geosynchronous satellite
67. Hertzian waves
68. 20
69. The transmitter and receiver
70. The ratio of the maximum carrier frequency deviation to the highest audio modulation frequency
71. Retarder
72. R.A. No. 3396
73. Time division
74. Technical, legal and financial
75. MOPA
76. The velocity of the wave on the transmission line divided by the velocity of light in a vacuum
77. Physical dimension
78. Semi-graded multimode
79. Spot beam
80. Phase control
81. Local oscillator, mixer and RF amplifier
82. Use of dummy antenna
83. Balanced line
84. Use of regulated power supply
85. 120 ohms
86. By application of antireflection coating
87. To reduce the possibility of internal arcing
88. Optic regenerators
89. Sputnik I
90. Frequency
91. Propagation delay
92. Thunderstorm
93. Modem
94. Power margin
95. Modem
96. Holding time
97. More bandwidth than analog
98. 3 ch.
99. Heating of capacitor in the oscillator
100. Over-modulated
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