Communication Skill Set 3

Bachelor of Science in Computer Science FY (BSc CS),

Bachelor of Computer Applications (BCA),

Bachelor of Science in Computer Science (BSc CS)

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This set of Communication Skill Multiple Choice Questions & Answers (MCQs) focuses on Communication Skill Set 3

Q1 | The _____________speech is also called as reported speech
  • direct
  • indirect
  • indefinite
  • definite
Answer: indirect
Q2 | A cordless telephone using separate frequencies for transmission in base and portable units is known as
  • duplex arrangement
  • half duplex arrangement
  • either (a) or (b)
  • neither (a) nor (b)
Answer: duplex arrangement
Q3 | For attenuation of high frequencies we should use
  • shunt capacitance
  • series capacitance
  • inductance
  • resistance
Answer: shunt capacitance
Q4 | A modem is classified as low speed if data rate handled is
  • upto 100 bps
  • upto 250 bps
  • upto 400 bps
  • upto 600 bps
Answer: upto 600 bps
Q5 | VSB modulation is preferred in TV because
  • it reduces the bandwidth requirement to half
  • it avoids phase distortion at low frequencies
  • it results in better reception
  • none of the above
Answer: it reduces the bandwidth requirement to half
Q6 | A woofer should be fed from the input through a
  • low pass filter
  • high pass filter
  • band pass filter
  • band stop filter
Answer: low pass filter
Q7 | Which of the following is an indirect way of generating FM?
  • armstrong modulator
  • varactor diode modulator
  • reactance fet modulator
  • reactance bipolar transistor
Answer: armstrong modulator
Q8 | When the length of antenna is a whole wavelength
  • the radiation at right angles is zero
  • the radiation at right angles is maximum
  • the radiation is zero in all directions
  • the radiation is maximum in all directions
Answer: the radiation at right angles is zero
Q9 | Circular polarization
  • is useful in reducing depolarization effect on received wave
  • involves critical alignment of transmitting and receiving antenna
  • is useful in discrimination between reception of adjacent beams
  • none of the above
Answer: is useful in reducing depolarization effect on received wave
Q10 | An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.
  • 102.3
  • 113
  • 70.2
  • 80.9
Answer: 113
Q11 | For telegraphy the most commonly used modulation system is
  • fsk
  • two tone modulation
  • pcm
  • single tone modulation
Answer: fsk
Q12 | Commercial Frequency deviation of FM is
  • 70 khz
  • 75 khz
  • 80 khz
  • 65 khz
Answer: 75 khz
Q13 | The colour of an object is decided by
  • the reflected colour
  • the wavelength transmitted through it
  • reflected colour for opaque object and wavelength transmitted through it for transparent objects
  • none of the above
Answer: reflected colour for opaque object and wavelength transmitted through it for transparent objects
Q14 | In Pulse Code Modulation system
  • large bandwidth is required
  • quantising noise can be overcome by companding
  • quantising noise can be reduced by decreasing the number of standard levels
  • suffers from the disadvantage of its incompatibly with tdm
Answer: large bandwidth is required
Q15 | Which of the following statements is correct?
  • convex lens has positive focal power and concave lens have negative focal power
  • convex lens has negative focal power and concave lens have positive focal power
  • all lens have positive focal power
  • all lens have negative focal power
Answer: convex lens has positive focal power and concave lens have negative focal power
Q16 | In Modulation, “carrier” is
  • resultant wave
  • speech voltage to be transmitted
  • voltage with constant frequency, phase or amplitude
  • voltage for which frequency, phase or amplitude is varied
Answer: voltage for which frequency, phase or amplitude is varied
Q17 | To eliminate ghosts in the picture
  • use a longer transmission line
  • connect a booster
  • change the antenna orientation of location
  • twist the transmission line
Answer: change the antenna orientation of location
Q18 | The frequency range of 300 kHz to 3000 kHz is known as
  • low frequency
  • medium frequency
  • high frequency
  • very high frequency
Answer: medium frequency
Q19 | Which of the following does not cause losses in optical fibre cables?
  • stepped index operation
  • impurities
  • microbending
  • attenuation in glass
Answer: stepped index operation
Q20 | For a low level AM system, the amplifiers modulated stage must be
  • linear devices
  • harmonic devices
  • class c amplifiers
  • non-linear devices
Answer: linear devices
Q21 | A telephone channel requires a bandwidth of about
  • 1 khz
  • 3 khz
  • 10 khz
  • 50 khz
Answer: 3 khz
Q22 | For a given carrier wave, maximum undistorted power is transmitted when value of modulation is
  • 1
  • 0.8
  • 0.5
Answer: 1
Q23 | As per Shannon-Hartley theorem, a noise less Gaussian channel has
  • zero capacity
  • infinite capacity
  • small capacity
  • none of the above
Answer: infinite capacity
Q24 | DVD uses
  • laser beam for both recording and playback
  • laser beam for recording and video head for playback
  • video head for recording and laser beam for playback
  • none of the above
Answer: laser beam for both recording and playback
Q25 | Fourier analysis indicate that a square wave can be represented as
  • a fundamental sine wave and odd harmonics
  • a fundamental sine wave and even harmonics
  • a fundamental sine wave and harmonics
  • fundamental and subharmonic sine waves
Answer: a fundamental sine wave and odd harmonics
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