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# Kennedy: MCQ in Television Fundamentals

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 ยฝ

b. 525

c. 30

d. 60

Solution:

2. The number of frames per second in the United States TV system is

a. 60

b. 262 ยฝ

c. 4.5

d. 30

Solution:

3. The number of lines per second in the United States TV system is

a. 31,500

b. 15,750

c. 262 ยฝ

d. 525

Solution:

4. The channel width in the United States TV system, in MHz, is

a. 41.25

b. 6

c. 4.5

d. 3.58

Solution:

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

Solution:

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

Solution:

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

Solution:

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

Solution:

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

Solution:

10. In television, 4:3 represents the

a. interlace ratio

b. maximum horizontal deflection

c. aspect ratio

d. ratio of the two diagonals

Solution:

11. Equalizing pulses in TV are sent during

a. horizontal blanking

b. vertical blanking

c. the serrations

d. the horizontal retrace

Solution:

12. An odd number of lines per frame forms part of every one of the worldโ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

Solution:

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

Solution:

14. The width of the vertical sync pulse in the United States TV system is

a. 21H

b. 3H

c. H

d. 0.5H

Solution:

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

Solution:

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

Solution:

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

Solution:

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

Solution:

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

Solution:

20. Another name for the horizontal retrace in a TV receiver is the

a. ringing

b. burst

c. damper

d. flyback

Solution:

21. Indicate which of the following signals is not transmitted in color TV:

a. Y

b. Q

c. R

d. I

Solution:

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

Solution:

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

d. makes sure that the color burst is not mistaken for sync pulses, by cutting off reception during the back porch

Solution:

### Complete List of MCQ in Electronic Communication Systems by Kennedy

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