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 Radio Transmitter
• 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

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

a. Saturated

b. Dark

c. Light

d. Monochrome

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

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

a. 0°

b. 45°

c. 60°

d. 90°

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

a. Low pass

b. Band pass

c. Notch

d. Comb

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

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

a. 25 %

b. 0 %

c. 12.5 %

d. 75 %

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

a. 0 %

b. 25 %

c. 12.5 %

d. 70 %

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

a. 0 %

b. 12.5 %

c. 25 %

d. 70 %

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

a. Gray tracking

b. Screen setting

c. Alignment

d. Degaussing

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

a. Coupling

b. Tuning of circuits

c. Shielding

d. Any of these

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

63. The vertical and horizontal pulses are separated at the

a. Sync separator

b. AFC

c. High voltage

d. AGC

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

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

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

a. Blooming

b. Confetti

c. Demodulation

d. Convergence

67. A _____ is equivalent to 525 scanning lines

a. Field

b. Frame

c. Cycle

d. Interface set

68. A _____ represents one set of 262 ½ scanning lines

a. Field

b. Frame

c. Cycle

d. Interface set

69. The number of scanning lines is _____ per second

a. 14750

b. 15570

c. 15750

d. 16550

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

a. 25

b. 30

c. 40

d. 50

71. Lack of raster is an indication of no

a. AGC

b. High voltage

c. Video signal

d. Television signal

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

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

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

a. A3F

b. F3F

c. A3C

d. F3C

75. What is emission A3F?

a. RTTY

b. SSB

c. TV

d. Modulated CW

76. What is emission F3F?

a. Facsimile

b. Modulated CW

c. Television

d. RTTY

77. Cause of slow rising white “hum bars” is the television

a. Pad filter

b. Bad rectifier

c. Bad picture tube

d. High voltage transformer

78. Adjusting the _____ may eliminate color confetti

a. Color chroma amplifier

b. Color killer

c. Color detector

d. Color oscillator

79. Video signal amplitude determine the picture quality called

a. Chrominance

b. Brightness

c. Contrast

d. Luminance

80. Part of broadcast day from midnight to local sunrise

a. Daytime

b. Experimental

c. Nighttime

d. Dawntime

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

a. Dawntime

b. Nighttime

c. Daytime

d. Experimental

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

83. Vestigial sideband is known as _____ type of emission

a. CF3

b. C3F

c. B8E

d. A3E

84. Vestigial sideband modulation is commonly used in

a. TV broadcasting

b. Monaural broadcasting

c. Stereo broadcasting

d. HF point-to-point communications

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

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

87. The type of emission used by standard AM radio broadcast

a. A5C

b. A0

c. A3

d. F3

88. The standard AM radio broadcast belongs to which frequency band?

a. MF

b. HF

c. VHF

d. LF

89. When were UHF channels (14 – 83) of television added?

a. 1902

b. 1945

c. 1947

d. 1952

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

a. 1904

b. 1945

c. 1953

d. 1960

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

a. HFC

b. HSC

c. HAFC

d. All of these

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

a. Selectivity

b. Sensitivity

c. Fidelity

d. Quality factor

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

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

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

96. Receiver sensitivity means

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

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

a. Provide improved tracking

b. Permit better adjacent-channel rejection

c. Improve the rejection of the image frequency

d. All of these

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

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

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

a. A

b. N

c. H

d. F

Questions and Answers in Broadcasting and Cable TV System Series

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

Complete List of MCQ in Communications Engineering per topic