Communication Skill MCQs

R

Ram Sharma • 188.81K Points
Coach

Q 1. One of the advantages of base modulation over collector modulation of a transistor class C amplifier is

(A) improved efficiency
(B) better linearity
(C) high power output per transistor
(D) the lower modulating power requirement
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V

Vijay Sangwan • 19.12K Points
Tutor I

Q 2. The direction of rotation of a CD is

(A) clockwise
(B) anticlockwise
(C) clockwise or anticlockwise depending on frequency of data stored
(D) mostly anticlockwise but some times clockwise
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V

Vinay • 19K Points
Tutor I

Q 3. Leak type bias is used in plate modulated class C amplifier to

(A) increase the bandwidth
(B) prevent over modulation
(C) prevent excessive grid current
(D) prevent tuned circuit damping
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V

Vijay Sangwan • 19.12K Points
Tutor I

Q 4. A buffer amplifier is

(A) a double-tuned amplifier
(B) a high gain d.c. amplifier
(C) a cathode follower stage
(D) none of the above
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V

Vinay • 19K Points
Tutor I

Q 5. In a FM receiver, amplitude limiter

(A) amplifiers low frequency signals
(B) reduces the amplitude of signals
(C) eliminates any change in amplitude of received fm signals
(D) none of the above
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V

Vikash Gupta • 24.35K Points
Instructor III

Q 6. The characteristic impedance of a twin wire feeder used for TV signals is about

(A) 1000 ohm
(B) 500 ohm
(C) 300 ohm
(D) 100 ohm
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V

Vijay Sangwan • 19.12K Points
Tutor I

Q 7. PAM stands for

(A) pulse analogue modulation
(B) phase analogue modulation
(C) pulse amplitude modulation
(D) phase amplitude modulation
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G

Gopal Sharma • 28.64K Points
Instructor II

Q 8. The maximum power output of a standard A earth station over the total band allocated to satellite communication is about

(A) 0.5 kw
(B) 8 kw
(C) 20 kw
(D) 50 kw
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R

Ranjeet • 25.13K Points
Instructor II

Q 9. In EM waves, polarization

(A) is always vertical in an isotropic medium
(B) is caused by reflection
(C) is due to transverse nature of waves
(D) results from longitudinal nature of waves
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G

Gopal Sharma • 28.64K Points
Instructor II

Q 10. In practical commercial FM system, channel bandwidth is

(A) 150 khz
(B) 100 khz
(C) 88 mhz
(D) 108 mhz
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