Test: Introduction to Communication System

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This mock test of Test: Introduction to Communication System for Electronics and Communication Engineering (ECE) helps you for every Electronics and Communication Engineering (ECE) entrance exam. This contains 10 Multiple Choice Questions for Electronics and Communication Engineering (ECE) Test: Introduction to Communication System (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Introduction to Communication System quiz give you a good mix of easy questions and tough questions. Electronics and Communication Engineering (ECE) students definitely take this Test: Introduction to Communication System exercise for a better result in the exam. You can find other Test: Introduction to Communication System extra questions, long questions & short questions for Electronics and Communication Engineering (ECE) on EduRev as well by searching above.

QUESTION: 1

The very high frequency (VHF) range extends from

A.
3-30 MHz
B.
30-300 MHz
C.
300-3000 MHz
D.
3000-30,000 MHz

Solution:

Very high frequency (VHF) has a frequency range of 30-300 MHz and wavelength range of 10 to 1 m.

QUESTION: 2

Match List-I (Frequencies spectrum) with List-II (Frequency range) and select the correct answer using the codes given-below the lists:
List-I
A. Extremely low frequency
B. Low frequencies
C. Voice frequencies
D. Very low frequencies
List-II
1. 30-300 kHz
2. 300-3000 Hz
3. 3-30 kHz
4. 30-300 Hz

A.
A
B.
B
C.
C
D.
D

Solution:

QUESTION: 3

Match List-I with List-li and select the correct answer using the codes given below the lists:
List-I
A. Channel
B. Carrier
C. Modulation
D. Distortion
List-II
1. The process by which some characteristics of a carrier is varied by ah information signal.
2. Any undesirable change in an information signal.
3. A signal that can be modulated by an information signal.
4. A path for transmission of signal.

A.
A
B.
B
C.
C
D.
D

Solution:

Correct Answer :-D

Explanation : A-4, B-3, C-1, D-2

a) Transmission channel, the path between two nodes of a network that a data communication follows. The term can refer to the physical cabling that connects the nodes on a network, the signal that is communicated over the pathway or a subchannel in a carrier frequency.

b) In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform that is modulated (modified) with an information bearing signal for the purpose of conveying information.

c) Modulation is a process by which a carrier signal is altered according to information in a message signal.

d) Distortion is any undesired change in the amplitude or phase of any component of an information signal that causes a change in the overall waveform of the signal.

QUESTION: 4

The communication medium causes the signal to be

A.
amplified
B.
modulated
C.
attenuated
D.
interfered with

Solution:

The communication medium is the channel through which the message travels from the transmitter to the receiver. During the process of transmission and reception the signal gets distorted due to noise introduced in the system.

QUESTION: 5

The function of the input transducer in a communication system is

A.
to transmit the message signal.
B.
to modulate the message signal.
C.
to convert message sound signal into electrical signal.
D.
none of the above

Solution:

The message from the information source may or may not be electrical in nature. In a case when the message produced by the information source is not electrical in nature, an input transducer is used to convert it into a time-varying electrical signal.

QUESTION: 6

Two key barriers to human communication are

A.
distance and ignorance
B.
language and cost
C.
distance and language
D.
distance and cost

Solution:

QUESTION: 7

Communication is the process of

A.
keeping in touch
B.
broadcasting
C.
exchanging information
D.
entertainment by electronics

Solution:

Communication is simply the basic process of exchanging information.

QUESTION: 8

Radio signals are made up of

A.
voltage and currents
B.
electric and magnetic fields
C.
electrons and protons
D.
noise and data

Solution:

QUESTION: 9

Which of the following is not a major communication medium?

A.
Free space
B.
Water
C.
Wires
D.
Fiber-optic cable

Solution:

Correct Answer :- c

Explanation : In the communication process, a medium is a channel or system of communication—the means by which information (the message) is transmitted between a speaker or writer (the sender) and an audience (the receiver).

Wire is not a major communication medium.

In a wired network, data is transmitted over a physical medium.

Nowadays, wireless networks are being used. So wired connection is not a major communication medium.

QUESTION: 10

The process of transmitting two or more information signals simultaneously over the same channel is called

A.
multiplexing
B.
telemetry
C.
detection
D.
modulation

Solution:

Multiplexing may be defined as the process of combining several message signals together and send them over the same communication channel, i.e. FDM, TDM and CDM.