Television Engineering MCQs

Question 1

A horizontal resolution of 240 lines for a certain television receiver implies a video frequency response of

Accepted Answer

3 MHz

Answer

4 MHz

Answer

4.5 MHz

Answer

3.5 MHz

Question 2

One of the following systems can be used for both recording and playback

Accepted Answer

Video Home System (VHS)

Answer

Capacitive Electronic Disc (CED)

Answer

Laser Disc

Answer

Very High Density (VHD)

Question 3

The system that uses a laser beam for playback is

Accepted Answer

VLP system

Answer

Capacitive Electonic Disc (ECD)

Answer

Betamax

Answer

Very High Density (VHD) system

Question 4

The video heads rotate at high speed to increase the

Accepted Answer

writing speed

Answer

tape speed

Answer

tape rotation

Answer

tape tension

Question 5

One of the following statements is true with reference to the recording of information on magnetic tape

Accepted Answer

The shortest recorded wavelength should typically be twice the width of the head gap

Answer

The wavelength to be recorded should be shorter than the width of the head gap

Answer

In video recording, it is the recording head and not the tape that moves during the recording process

Answer

For effective magnetic tape recording,the tape should move with a speed that is large enough so as to give a recorded wavelength that is at least ten times the width of head gap

Question 6

The high frequency response improves

Accepted Answer

with a thinner gap

Answer

with a thicker gap

Answer

when the writing speed is low

Answer

when the head also moves

Question 7

While recording a TV programme on a video cassette recorder

Accepted Answer

the TV and VCR can be operated on different channesl

Answer

it is essential that both TV and VCR are operating on the same channel

Answer

the brightness and contrast should be optimally adjusted on the TV screen

Answer

none of these

Question 8

The highest frequency that can be effectively recorded on a video tape recorder having a writing speed of 6 m/s and the recording head gap width of 600 nm is

Accepted Answer

5 Mhz

Answer

10 MHz

Answer

2.5 Mhz

Answer

3 MHz

Question 9

Increasing the head drum diameter

Accepted Answer

increases the writing speed for a given rpm

Answer

decreases thewriting speed for a given rpm

Answer

has no effect on the writing speed

Answer

makes the system mechanically more stable