Online Questions and Answers Topic Outline
- MCQs in Radio Transmitter
- MCQs in AM and FM
- MCQs in Television
- MCQs in Studio (Microphone, Amplifiers, Cameras, Lighting, etc.)
- MCQs in Cable Television
MCQs in Broadcasting and Cable TV System Series
Following is the list of multiple choice questions in this brand new series:
Continue Practice Exam Test Questions Part II 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
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