Television Engineering MCQs

Question 1

The reverberation time of a broadcast studio for music, having a volume of 160 cubic metre, is of the order of ___ second.

Accepted Answer

0.5

Answer

0.2

Answer

1.5

Answer

3

Question 2

Which of the following materials has the highest absorption coefficient for sound waves?

Accepted Answer

celotex

Answer

copper plate

Answer

teakply

Answer

alnico

Question 3

Modulation is used for

Accepted Answer

transmitting intelligence over long distances

Answer

reducing the bandwidth of transmission

Answer

allowing the use of cheaper tubes

Answer

none of above

Question 4

Indicate which of the following frequencies cannot ordinarily by used for beyond-the-horizon terrestrial communication :

Accepted Answer

both A and C

Answer

600 kHz

Answer

15 MHz

Answer

12 GHz

Question 5

In the visible spectrum of electromagnetic waves, the following has longest wavelength

Accepted Answer

red

Answer

green

Answer

blue

Answer

white

Question 6

A super-heterodyne receiver with an IF of 450 kHz is tuned to a signal of 1200 kHz, the image frequency is ____ kHz.

Accepted Answer

2100

Answer

750

Answer

1650

Answer

2200

Question 7

D-layer in the ionosphere is largely present

Accepted Answer

during day only

Answer

all the 24 hours

Answer

during night only

Answer

during cloudy only

Question 8

The modulator stage in a radio transmitter is normally

Accepted Answer

class-C

Answer

class-B push-pull

Answer

class-A

Answer

class-D

Question 9

If the carrier of a 100% modulated AM wave is suppressed, the percentage saving of power will be

Accepted Answer

66.6

Answer

50

Answer

150

Answer

0.353