This is the Multiple Choice Questions in Chapter 17: Television Fundamentals from the book Electronic Communication Systems by George Kennedy. If you are looking for a reviewer in Communications Engineering this will definitely help. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
Start Practice Exam Test Questions
Choose the letter of the best answer in each questions.
1. The number of lines per field in the United States TV system is
- a. 262 ½
- b. 525
- c. 30
- d. 60
2. The number of frames per second in the United States TV system is
- a. 60
- b. 262 ½
- c. 4.5
- d. 30
3. The number of lines per second in the United States TV system is
- a. 31,500
- b. 15,750
- c. 262 ½
- d. 525
4. The channel width in the United States TV system, in MHz, is
- a. 41.25
- b. 6
- c. 4.5
- d. 3.58
5. Interlacing is used in television to
- a. produce the illusion of motion
- b. ensure that all the lines on the screen are scanned, not merely the alternate ones
- c. simplify the vertical sync pulse train
- d. avoid flicker
6. The signals sent by the TV transmitter to ensure correct scanning in the receiver are called
- a. sync
- b. chroma
- c. luminance
- d. video
7. In the United States color television system, the intercarrier frequency, in MHz, is
- a. 3.58
- b. 3.57945
- c. 4.5
- d. 45.75
8. Indicate which voltages are not found in the output of a normal monochrome receiver video detector.
- a. Sync
- b. Video
- c. Sweep
- d. Sound
9. The carrier transmitted 1.25 MHz above the bottom frequency in the United States TV channel is the
- a. sound carrier
- b. chroma carrier
- c. intercarrier
- d. picture carrier
10. In television, 4:3 represents the
- a. interlace ratio
- b. maximum horizontal deflection
- c. aspect ratio
- d. ratio of the two diagonals
11. Equalizing pulses in TV are sent during
- a. horizontal blanking
- b. vertical blanking
- c. the serrations
- d. the horizontal retrace
12. An odd number of lines per frame forms part of every one of the world’s TV systems. This is
- a. done to assist interlace
- b. purely an accident
- c. to ensure that line and frame frequencies can be obtained from the same original source
- d. done to minimize interference with the chroma subcarrier
13. The function of the serrations in the composite video waveform is to
- a. equalize the charge in the integrator before the start of vertical retrace
- b. help vertical synchronization
- c. help horizontal synchronization
- d. simplify the generation of the vertical sync pulse
14. The width of the vertical sync pulse in the United States TV system is
- a. 21H
- b. 3H
- c. H
- d. 0.5H
15. Indicate which of the following frequencies will not be found in the output of a normal TV receiver tuner:
- a. 4.5 MHz
- b. 41.25 MHz
- c. 45.75 MHz
- d. 42.17 MHz
16. The video voltage applied to the picture tube of a television receiver is fed in
- a. between grid and ground
- b. to the yoke
- c. to the anode
- d. between grid and cathode
17. The circuit that separates sync pulses from the composite video waveform is
- a. the keyed AGC amplifier
- b. a clipper
- c. an integrator
- d. a differentiator
18. The output of the vertical amplifier, applied to the yoke in a TV receiver, consists of
- a. direct current
- b. amplified vertical sync
- c. a sawtooth voltage
- d. a sawtooth current
19. The HV anode supply for the picture tube of a TV receiver is generated in the
- a. mains transformer
- b. vertical output stage
- c. horizontal output stage
- d. horizontal deflection oscillator
20. Another name for the horizontal retrace in a TV receiver is the
- a. ringing
- b. burst
- c. damper
- d. flyback
21. Indicate which of the following signals is not transmitted in color TV:
- a. Y
- b. Q
- c. R
- d. I
22. The shadow mask in a color picture tube is used to
- a. reduce x-ray emission
- b. ensure that each beam hits only its own dots
- c. increase screen brightness
- d. provide degaussing for the screen
23. In a TV receiver, the color killer
- a. cuts off the chroma stages during monochrome reception
- b. ensures that no color is transmitted to monochrome receivers
- c. prevents color overloading
- d. makes sure that the color burst is not mistaken for sync pulses, by cutting off reception during the back porch
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