Communication MCQ for UGC NET. We covered all the Communication MCQ for UGC NET in this post for free so that you can practice well for the exam.
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MCQ on Communication for Students
Pre-emphasis in the FM system is done to
(a) compress modulating signal
(b) expand modulating signal
(c) amplify the lower frequency component of the modulating signal
(d) amplify the higher frequency component of the modulating signal
Option d – amplify the higher frequency component of the modulating signal
In an AM wave, the information is contained within
(a) r.f. carrier wave
(b) only lower and upper side frequencies
(c) both r.f. carrier and side frequencies
(d) None of these
Option b – only lower and upper side frequencies
For a single sideband transmission, a balanced modulator is used to
(a) increase the power of the carrier wave
(b) increase the amplitude of the carrier wave
(c) suppress the audio signal
(d) suppress the carrier component
Option d – suppress the carrier component
The picture signal in TV broadcasts is modulated in
(a) SSB
(b) VSB
(c) FM
(d) DSB
Option b – VSB
Television signals are
(a) frequency modulated
(b) amplitude modulated
(c) both frequency and amplitude modulated
(d) phase-modulated
Option c – both frequency and amplitude modulated
100% modulation in FM means
(a) actual frequency deviation > maximum allowed frequency deviation
(b) actual frequency deviation maximum allowed frequency deviation
(c) actual frequency deviation 2 maximum allowed frequency deviation
(d) actual frequency deviation <maximum allowed. frequency deviation
Option b – actual frequency deviation maximum allowed frequency deviation
Encoding of the signal is required for
(a) modulation at the transmitting end
(b) modulation at receiving end
(c) demodulation at receiving end
(d) demodulation at the transmitting end
Option a – modulation at the transmitting end
The main function of the RF amplifiers in a superheterodyne receiver is to
(a) amplify the signal
(b) reject unwanted signal
(c) discriminate against image frequency signal and IF signal
(d) all of the above
Option d – all of the above
Which of the following pair is correctly matched
(a) Radiotelegraph-VSB
(b) Television-SSB
(c) Radio broadcast-AM
(d) Radar-AM
Option c – Radio broadcast-AM
The function of an amplitude limitter in an FM receiver is
(a) to reduce the amplitude of the signal to suit the IF amplifier
(b) to amplify the low-frequency signal
(c) to eliminate any change in the amplitude of the receiver FM signal
(d) None of these
Option c – to eliminate any change in the amplitude of the receiver FM signal
Space wave communication is limited.
(a) to the line of sight distance
(b) by earth’s curvature
(c) either (a) or (b)
(d) both (a) and (b)
Option d – both (a) and (b)
The radio altimeter on an aircraft is a
(a) MTI radar
(b) continuous wave radar
(c) FM-continuous wave radar
(d) Doppler radar
Option c – FM-continuous wave radar
Long range Р g transmission of the TV signal is done by
(a) space-wave
(b) sky waves
(c) ground wave
(d) artificial satellite.
Option d – artificial satellite
Skip distance does not depend on
(a) the frequency of the signal transmitted
(b) the electron density of the layer
(c) they get absorbed by the troposphere
(d) they get reflected by the stratosphere.
Option d – they get reflected by the stratosphere
In PCM if the transmission path is very long
(a) pulse spacing is reduced
(b) pulse amplitude is increased
(c) pulse width is increased
(d) repeater stations are used.
Option d – repeater stations are used
Picture signal of TV-signal is
(a) amplitude modulated
(b) frequency modulated
(c) phase-modulated
(d) pulse modulated
Option a – amplitude modulated
Synchronizing pulses are transmitted during
(a) fly-back intervals of horizontal motion of camera scanning
(b) fly-back intervals of vertical motion of camera scanning
(c) both (a) and (b)
(d) None of these
Option c – both (a) and (b)
The intensity of the electric field obtained at the receiver antenna for space wave propagation is
(a) directly proportional to the perpendicular distance from the transmitter to the antenna
(b) inversely proportional to the perpendicular distance from the transmitter to the antenna
(c) directly proportional to the square perpendicular distance from the transmitter to the antenna
(d) inversely proportional to the square perpendicular distance from the transmitter to the antenna
Option d – inversely proportional to the square perpendicular distance from the transmitter to the antenna
We covered all the communication MCQ for UGC net above in this post for free so that you can practice well for the exam.
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