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ESE EC : Communications Champion Quiz 5
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Question 1
The frequency range of very high frequency (VHF) is
Question 2
Which one of the following antenna structures is best for generating a circularly polarized radiation?
Question 3
The frequency range for satellite communication is
Question 4
Range resolution in RADAR is determined by
Question 5
The output stage of a transponder onboard a satellite has a maximum power output of 10 watts. However, it is not operated at the maximum power output in order to
Question 6
Losses in optical fibres can because by which of the following?
1). Impurities
2). Microbending
3). Stepped index operation
Select the correct answer using the code given below:
1). Impurities
2). Microbending
3). Stepped index operation
Select the correct answer using the code given below:
Question 7
Light travels along the optical fibres by which mechanism?
Question 8
An optical fibre communication system works on a wavelength of 1.3 μm. The number of subscribers it can feed, if a channel requires 20 kHz, is
Question 9
Assertion (A): Isolation transformers should always be used when servicing TV receivers without power transformers.
Reason (R): TV receivers which use semiconductor rectifiers do not always use a power transformer.
Reason (R): TV receivers which use semiconductor rectifiers do not always use a power transformer.
Question 10
Match List-I (Communication Service) with List-II (Bandwidth) and select the correct answer using the code given below the lists:
List-I
A). AM Broadcast
B). Telephone
C). Wideband FM
D). TV
List-II
1). 10 kHz
2). 4 kHz
3). 200 kHz
4). 7 MHZ
List-I
A). AM Broadcast
B). Telephone
C). Wideband FM
D). TV
List-II
1). 10 kHz
2). 4 kHz
3). 200 kHz
4). 7 MHZ
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Jun 2ESE & GATE EC
