# Test: Communication- 3

## 25 Questions MCQ Test Basic Electronics Engineering for SSC JE (Technical) | Test: Communication- 3

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Attempt Test: Communication- 3 | 25 questions in 50 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Basic Electronics Engineering for SSC JE (Technical) for Electrical Engineering (EE) Exam | Download free PDF with solutions
QUESTION: 1

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QUESTION: 2

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QUESTION: 3

### In a PLL

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QUESTION: 4

What bandwidth is needed for an FM signal thathas a peak deviation of ± 3 kHz and handleraudio signals from 200 Hz to 5 kHz.

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QUESTION: 5

Main factor that determine the accuracy of areconstructed PCM signal is the

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QUESTION: 6

Polarization mode dispersion is mainly observedin

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QUESTION: 7

The spectrum of a band pass signal spans from 20 kHz to 30 kHz. Signal can be recoveredideally from the sampled values when sampling rate is at least

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QUESTION: 8

The nyquist rate for the signal x(t) = 2 cos ( t) cos ( t) in

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QUESTION: 9

The quantisation noise of a PCM system dependsan

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QUESTION: 10

Consider the two signals

x1 = 5 cos ( )

x2 = 2 cos ( ) cos ( t)

The minimum sampling rate is

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QUESTION: 11

A single mode fibre does not suffer from which type of dispersion

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QUESTION: 12

Which of the following mode introduces partition noise ?

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QUESTION: 13

What was the first commercial geostationarycommunication satelite ?

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QUESTION: 14

In an optical fiber, the light beam propagator dueto which one of the following ?

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QUESTION: 15

If the value of a resistor creating thermal noise isdoubled, the noise generated is

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QUESTION: 16

Which one of the following is an indirect way ofgenerating FM ?

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QUESTION: 17

Tropospheric scatter communication is used forwhich frequency bond ?

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QUESTION: 18

Why does an FM radio station perform betterthan AM station radiating the same total power?

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QUESTION: 19

In a PCM system, if we increase the levels from 2 to 8, how do the relative bandwidthrequirement varies ?

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QUESTION: 20

How can quantisation noise be reduced ?

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QUESTION: 21

Light travels along optical fibres by whichmechanism ?

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QUESTION: 22

72. What is the reason for using frequencies of theorder of a few GHz in satelite communication ?

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QUESTION: 23

Which one of the following blocks is not commonin both AM ad FM receivers ?

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QUESTION: 24

An analog signal has significant spectralcomponents from 1 kHz to 5 kHz. What is theNyquist rate for this signal ?

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QUESTION: 25

A ckt producer an output y(t) = a + b x2(t) wherex(t) is its input. This ckt can produce

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