Television Engineering MCQs

Question 1

What is not tuned to 3.58 MHz in an NTSC colour TV receiver?

Accepted Answer

Burst amplifier

Answer

Chroma amplifier

Answer

Colour demodulator input

Answer

Video preamplifier

Question 2

Which control varies the phase angle of the demodulated colur videosignal?

Accepted Answer

Tint control

Answer

Colour level control

Answer

Contrast control

Answer

Picture control

Question 3

When a colour video camera faces a black and white scene

Accepted Answer

the outputs from all pick-up tubes shall have equal amplitudes

Answer

the outputs from all pick-up tubes will be zero

Answer

no video signal is produced

Answer

none of these

Question 4

The peak to peak amplitude of one of the given signals affects picture contrast

Accepted Answer

video signal

Answer

audio signal

Answer

AGC bias

Answer

horizontal scanning signal

Question 5

When we ensure that each electron beam falls at the centre of the corresponding dot while scanning, we are basically

Accepted Answer

achieving colour convergence

Answer

ensuring colour purity

Answer

degaussing the metallic parts

Answer

none of these

Question 6

In case of cathode drive for colour picture tube CRT, the signals needed in PAL standards are

Accepted Answer

Y, U and V

Answer

(R?Y), (B?Y) and (G?Y)

Answer

R, G and B

Answer

Y, I and Q

Question 7

One of the following causes excessive snow in the picture

Accepted Answer

Weak RF amplifier

Answer

Excessive antenna signal

Answer

Weak video amplifier

Answer

Defective AGC circuit

Question 8

In reverse AGC,

Accepted Answer

as the received signal strength increases, the gain is reduced by driving the transistors from active region towards cut-off

Answer

as the received signal strength increases, the gain is reduced by driving the transistor from active region towards saturation

Answer

the amplifier circuits that have to receive the AGC bias must use PNP transistors

Answer

the amplifier circuits that have to receive the AGC bias must use NPN transistors

Question 9

The volume control in a TV receiver is located

Accepted Answer

at the input of audio pre-amplifier

Answer

at the input of sound IF amplifier

Answer

at the input of audio output stage

Answer

at the input of loudspeaker