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# MCQ in Broadcasting and Cable TV System Part 2 | ECE Board Exam

This is the Multiples Choice Questions Part 2 of the Series in Broadcasting and Cable TV System as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

#### Online Questions and Answers Topic Outline

• MCQ in AM and FM
• MCQ in Television
• MCQ in Studio (Microphone, Amplifiers, Cameras, Lighting, etc.)
• MCQ in Cable Television

#### Continue Practice Exam Test Questions Part 2 of the Series

51. What is the approximate bandwidth occupied by the chrominance video signal for color TV?

a. 0.8 MHz

b. 1.8 MHz

c. 8.1 MHz

d. 1.6 MHz

Solution:

52. The colors found around the perimeter of the color triangle are said to be

a. Saturated

b. Dark

c. Light

d. Monochrome

Solution:

53. At what position on the color triangle will saturated yellow be located?

a. Between red and blue

b. Between red and green

c. Between blue and green

d. At the center

Solution:

54. What is the phase difference between the I and Q color signal carriers?

a. 0ยฐ

b. 45ยฐ

c. 60ยฐ

d. 90ยฐ

Solution:

55. _____ is the most effective filter for separating luminance and chrominance frequency components.

a. Low pass

b. Band pass

c. Notch

d. Comb

Solution:

56. The chrominance processing circuits can be deactivated when monochrome broadcasts are received by the

a. Color killer

b. SAW filter

c. NOT gate

d. All of the above

Solution:

57. What is the standard video level, in percent PEV, for blanking?

a. 25 %

b. 0 %

c. 12.5 %

d. 75 %

Solution:

58. What is the percent video level, in percent PEV, for black?

a. 0 %

b. 25 %

c. 12.5 %

d. 70 %

Solution:

59. What is the standard video level, in percent PEV, for white?

a. 0 %

b. 12.5 %

c. 25 %

d. 70 %

Solution:

60. One should first perform _____ before a convergence setup is performed.

a. Gray tracking

b. Screen setting

c. Alignment

d. Degaussing

Solution:

61. If there are too many harmonics, one should check the

a. Coupling

b. Tuning of circuits

c. Shielding

d. Any of these

Solution:

62. In transmitter amplifier design, an even-order harmonics can be prevented or reduced by

a. Using a push-pull amplifier

b. Operating class C

c. Operating class AB

d. All of these

Solution:

63. The vertical and horizontal pulses are separated at the

a. Sync separator

b. AFC

c. High voltage

d. AGC

Solution:

64. The reason why buffer stage is included in a transmitter is to

a. Present a constant load to the oscillator stage

b. Present a low impedance to the oscillator stage

c. Stop the oscillator from generating parasitic oscillations

d. All of these

Solution:

65. Where is the operating position of a radio station?

a. On the bridge

b. At the control point

c. At the location of the receiver

d. At the location of the transmitter

Solution:

66. The alignment of the three color guns to a common point is known as

a. Blooming

b. Confetti

c. Demodulation

d. Convergence

Solution:

67. A _____ is equivalent to 525 scanning lines

a. Field

b. Frame

c. Cycle

d. Interface set

Solution:

68. A _____ represents one set of 262 ยฝ scanning lines

a. Field

b. Frame

c. Cycle

d. Interface set

Solution:

69. The number of scanning lines is _____ per second

a. 14750

b. 15570

c. 15750

d. 16550

Solution:

70. Picture frames are repeated at the rate of _____ per second

a. 25

b. 30

c. 40

d. 50

Solution:

71. Lack of raster is an indication of no

a. AGC

b. High voltage

c. Video signal

d. Television signal

Solution:

72. The sound and video signals are separated at the _____ of the TV receiver

a. IF stage

b. Video amplifier

c. Video detector

d. Burst separator

Solution:

73. The presence of color bars is an indication that there is a problem in the _____ circuit

a. Horizontal

b. Reactor

c. Burst separator

d. Chroma amplifier

Solution:

74. Type of emission produced when a frequency modulated transmitter is modulated by a TV signal

a. A3F

b. F3F

c. A3C

d. F3C

Solution:

75. What is emission A3F?

a. RTTY

b. SSB

c. TV

d. Modulated CW

Solution:

76. What is emission F3F?

a. Facsimile

b. Modulated CW

c. Television

d. RTTY

Solution:

77. Cause of slow rising white โhum barsโ is the television

d. High voltage transformer

Solution:

78. Adjusting the _____ may eliminate color confetti

a. Color chroma amplifier

b. Color killer

c. Color detector

d. Color oscillator

Solution:

79. Video signal amplitude determine the picture quality called

a. Chrominance

b. Brightness

c. Contrast

d. Luminance

Solution:

80. Part of broadcast day from midnight to local sunrise

a. Daytime

b. Experimental

c. Nighttime

d. Dawntime

Solution:

81. Part of broadcast day from local sunset to local sunrise

a. Dawntime

b. Nighttime

c. Daytime

d. Experimental

Solution:

82. What causes snow in television?

a. High Q in the tuned circuit

b. Excessive gain

c. Random noise in the signal

d. Insufficient wave traps

Solution:

83. Vestigial sideband is known as _____ type of emission

a. CF3

b. C3F

c. B8E

d. A3E

Solution:

84. Vestigial sideband modulation is commonly used in

d. HF point-to-point communications

Solution:

85. Which of the following filters block FM radio band for TV channels (2 to 13)?

a. High-pass filter

b. Low-pass filter

c. Band pass filter

d. Band-reject filter

Solution:

86. The FM broadcast band is from

a. 535 to 1600 kHz

b. 30 to 300 kHz

c. 88 to 108 MHz

d. 300 to 2000 MHz

Solution:

a. A5C

b. A0

c. A3

d. F3

Solution:

a. MF

b. HF

c. VHF

d. LF

Solution:

89. When were UHF channels (14 โ 83) of television added?

a. 1902

b. 1945

c. 1947

d. 1952

Solution:

90. When was colored TV standards established in the United States?

a. 1904

b. 1945

c. 1953

d. 1960

Solution:

91. What synchronizes the horizontal line of the TV picture tube?

a. HFC

b. HSC

c. HAFC

d. All of these

Solution:

92. A measure of how well the receiver can respond to every weak signals/

a. Selectivity

b. Sensitivity

c. Fidelity

d. Quality factor

Solution:

93. What is the allowable frequency deviation of a commercial FM broadcast band?

a. 15 kHz

b. 75 kHz

c. 5 kHz

d. 100 kHz

Solution:

94. The final amplifier of either FM or AM transmitter is operated as

a. Class A

b. Class B

c. Class C

d. Class D

Solution:

95. Standard AM broadcasting use _____ for greater and efficient coverage

a. Circular polarized wave antenna

b. Horizontal polarized wave antenna

c. Both vertical and horizontal polarized wave antenna

d. Vertical polarized wave antenna

Solution:

a. The frequency allocation of the system

b. Input impedance of the receiver

c. The ability of picking up weak signal

d. The power to deliver the information

Solution:

97. The main functions of the RF amplifier in a superheterodyne receiver is to

a. Provide improved tracking

c. Improve the rejection of the image frequency

d. All of these

Solution:

98. Local oscillator of a broadcast receiver always tunes to a frequency higher than the incoming frequency in order

a. To help the image frequency rejection

b. To allow easy tracking

c. To allow adequate frequency coverage without switching

d. All of these

Solution:

99. Type of filter used in TV receivers that separates the chroma signal from the colorplexed video signal but leaves intact the Y-component

a. Comb filter

b. Bandpass filter

c. Color filter

d. Low pass filter

Solution:

100. What is the first letter-symbol for emission of unmodulated carrier?

a. A

b. N

c. H

d. F

Solution:

Following is the list of multiple choice questions in this brand new series:

MCQ in Broadcasting and Cable TV System
PART 1: MCQ from Number 1 โ 50                        Answer key: PART 1
PART 2: MCQ from Number 51 โ 100                   Answer key: PART 2
PART 3: MCQ from Number 101 โ 150                 Answer key: PART 3
PART 4: MCQ from Number 151 โ 200                 Answer key: PART 4
PART 5: MCQ from Number 201 โ 250                 Answer key: PART 5
PART 6: MCQ from Number 251 โ 300                 Answer key: PART 6
PART 7: MCQ from Number 301 โ 350                 Answer key: PART 7
PART 8: MCQ from Number 351 โ 400                 Answer key: PART 8
PART 9: MCQ from Number 401 โ 450                 Answer key: PART 9
PART 10: MCQ from Number 451 โ 500                 Answer key: PART 10

### Complete List of MCQ in Communications Engineering per topic

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