Below are the answers key for the 100 items set of Practice Examination 11 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. a.) EO 59
2. c.) 50 Hz
3. d.) Horizontal
4. d.) Horizontal
5. a.) Index of Refraction
6. a.) Doughnut Shape
7. a.) Shock Wave
8. b.) High Usage Hour
9. d.) Presbycusis
10. b.) HF
11. a.) Vocoder
12. d.) Ferrite Isolator
13. a.) Guard
14. a.) Pacing
15. c.) Detector
16. a.) Minimum
17. a.) GSM
18. d.) Posigrade
19. b.) An equipment resistance that would dissipate the same amount of power as that radiated from an antenna
20. b.) Direct connection with the use of a null modem.
21. a.) Frequency Discriminator
22. b.) Modal Delay Spreading
23. c.) Three Lines
24. c.) Master Oscillator
25. c.) Regulate the power supply voltage
26. d.) Velocity Factor
27. b.) Weak Part
28. a.) 15 kHz
29. d.) The loudest signal received is the only demodulated signal.
30. c.) Bicone
31. c.) Echo time of the object to the source.
32. d.) 29.15 mi
33. b.) 300 – 3400 Hz
34. a.) NMT
35. b.) Interlaced Scanning
36. d.) Ultraviolet
37. d.) It is about 5% shorter.
38. b.) Antenna Gain
39. a.) High SWR
40. a.) Modem
41. a.) Antenna Bandwidth
42. b.) Cache
43. a.) Electric and Magnetic Field
44. b.) Using heat that would burn the image into heat.
45. a.) Service Entrance
46. a.) coaxial cable
47. a.) National Telecommunication Commission
48. a.) 95 – 100 dB
49. a.) F3E
50. b.) F2
51. a.) modulation
52. c.) 0.34 m
53. a.) scanning
54. b.) variable resistance
55. a.) Public Telephone System
56. d.) Secondary Service Area
57. a.) bandwidth
58. b.) 262.5
59. d.) Period
60. a.) The characteristic impedance decreases.
61. c.) NTC
62. a.) PAM
63. b.) b and c
64. b.) SONAR
65. c.) Installing a filter at the receiver
66. d.) Transmitter
67. b.) Frequency Multiplier
68. a.) The radio of deviation frequency and modulating
69. d.) Multi frequency band operation
70. d.) Longitudinal
71. b.) Provision of radio telegraph operator
72. a.) Centripetal acceleration
73. d.) Silicon Crystal
74. c.) PL-259
75. d.) 1MHz – 500MHz
76. a.) 1
77. d.) Desensitizing
78. d.) Analog
79. b.) Can be used for multiband operation.
80. b.) sample and hold
81. c.) Heating in the oscillator device causing a change in electrical characteristics.
82. b.) Cancellation of its authority.
83. c.) Bandwidth
84. a.) Poor soldered connections.
85. b.) 16H
86. d.) Bulky
87. c.) Connection
88. b.) Producing sum and difference of two frequencies from a combination of two signals.
89. d.) As pure inductor
90. d.) Carry out loopback test.
91. d.) System Network Architecture
92. d.) R.A. 7925
93. b.) Segmentation
94. c.) 22,300 mi
95. c.) Diplexer
96. b.) Threshold of Pain
97. c.) J
98. b.) 312 to 552 kHz
99. d.) Metric
100. c.) 4.5 MHz
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