Television Engineering MCQs

Question 1

The purpose of sync separator in TV receivers is

Accepted Answer

to separate sync pulses (hor and vert) from the composite video signal

Answer

to separate horizontal and vertical sync pulses

Answer

to separate sync pulses from associated noise

Answer

none of these

Question 2

Vertical oscillator generates

Accepted Answer

50 Hz sawtooth signal in CCIR standards

Answer

50 Hz sinusoidal signal in CCIR standards

Answer

50 Hz sinusoidal signal in FCC standards

Answer

60 Hz sawtooth signal in CCIR standards

Question 3

The circuit that keeps horizontal output frequency stable is

Accepted Answer

AFC

Answer

AGC

Answer

Horizontal deflection circuit

Answer

Horizontal output stage

Question 4

ASPECT RATIO with reference to television is defined as ratio of

Accepted Answer

rastar width to rastar height

Answer

raster height to raster width

Answer

horizontal scanning frequency to vertical scanning frequency

Answer

none of these

Question 5

Television screen width is always greater than the screen height or in other words raster width is more than raster height because

Accepted Answer

picture motion is in the horizontal direction

Answer

horizontal deflection frequency is higher

Answer

more detail is in the horizontal direction

Answer

none of these

Question 6

Horizontal-hold control is generally a

Accepted Answer

variable inductance

Answer

variable capacitance

Answer

variable resistance

Answer

preset resistance

Question 7

AGC (Automatic Gain applied to

Accepted Answer

RF, Mixer and IF stages

Answer

RF and IF stages

Answer

IF stage

Answer

none of these

Question 8

FM detector employed in the sound section of a television receiver is generally

Accepted Answer

a ratio detector

Answer

a frequency discriminator (Foster-Seeley type)

Answer

eitherof the two

Answer

none of these

Question 9

Switching of channel-selector switch from one channel to another

Accepted Answer

alters the resonant frequency of tuned circuits of RF, mixer and local oscillator stages

Answer

alters the resonant frequency of tuned circuits of local oscillator

Answer

alters the resonant frequency of tuned circuits of RF and IF stages

Answer

alters the resonant frequency of tuned circuits of RF, IF and local oscillator stages