Television Engineering MCQs

Question 1

In commericial FM broadcasting, the maximum frequency deviation is normally ? kHz.

Accepted Answer

75

Answer

5

Answer

15

Answer

200

Question 2

Indicate the false statement. Modulation is used to

Accepted Answer

reduce the bandwidth used

Answer

separate differing transmissions

Answer

ensure that intelligence may be transmitted over long distances

Answer

allow the use of practicable antennas

Question 3

One of the following is an indirect way of generating FM. This is the ?modulator.

Accepted Answer

Armstrong

Answer

reactance tube

Answer

varactor diode

Answer

reactance transistor

Question 4

Diversity reception normally means

Accepted Answer

reception of programme from a transmitter through two receivers connected to two different aerials situated a few wavelengths apart.

Answer

reception of diverse programmes

Answer

reception of programme from a transmitter through two receivers connected to two different aerial structures half wavelength apart.

Answer

all the above

Question 5

A carrier is simultaneously modulated by two sine waves with modulation indices of 0.3 and 0.4, the total modulation index

Accepted Answer

is 0.5

Answer

is 1

Answer

cannot be calculated unless the phase relations are known

Answer

is 0.7

Question 6

In a pentode, the screen grid

Accepted Answer

reduces the plate grid capacitance

Answer

reduces the effect of secondary emission from plate

Answer

increases the trans-conductance of the tube

Answer

increase the power-handling capacity of the tube

Question 7

In an FM receivet, the channel bandwidth is around ? kHz.

Accepted Answer

200

Answer

10

Answer

20

Answer

75

Question 8

For a global coverage, the minimum number of satellites required is

Accepted Answer

three

Answer

ten

Answer

one

Answer

two

Question 9

When carrier wave is modulated at 100%, its power is increased by ? percent.

Accepted Answer

50

Answer

100

Answer

150

Answer

0