1) If the constant 'k' is positive, then what would be its contribution on the phase plot?
a. 0°
b. 45°
c. 90°
d. 180°
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Answer
Explanation
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ANSWER: 0°
Explanation:
No explanation is available for this question!
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2) If the unity feedback system is given by the open loop transfer function G(s) = ks2 / [(1 + 0.3s) (1+ 0.05s)], what would be the initial slope of magnitude plot?
a. 20 dB/decade
b. 40 dB/decade
c. 60 dB/decade
d. Unpredictable
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Answer
Explanation
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ANSWER: 40 dB/decade
Explanation:
No explanation is available for this question!
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3) The system is said to be marginally stable, if gain margin is ______
a. 0
b. 1
c. +∞
d. None of the above
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Answer
Explanation
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ANSWER: +∞
Explanation:
No explanation is available for this question!
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4) If the phase angle at gain crossover frequency is estimated to be -105°, what will be the value of phase margin of the system?
a. 23°
b. 45°
c. 60°
d. 75°
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Answer
Explanation
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ANSWER: 75°
Explanation:
No explanation is available for this question!
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5) At which frequency does the magnitude of the system becomes zero dB?
a. Resonant frequency
b. Cut-off frequency
c. Gain crossover frequency
d. Phase crossover frequency
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Answer
Explanation
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ANSWER: Gain crossover frequency
Explanation:
No explanation is available for this question!
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6) The frequency at which the phase of the system acquires ____ is known as 'Phase crossover frequency'.
a. 90°
b. -90°
c. 180°
d. -180°
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Answer
Explanation
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ANSWER: -180°
Explanation:
No explanation is available for this question!
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7) If a pole is located at origin, how does it get represented on the magnitude plot?
a. -10 log (ω) dB
b. -20 log (ω) dB
c. -40 log (ω) dB
d. -60 log (ω) dB
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Answer
Explanation
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ANSWER: -20 log (ω) dB
Explanation:
No explanation is available for this question!
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8) According to the principle of log-scales, if the ratio between two points is same, then the two points get ________equally.
a. United
b. Separated
c. Multiplexed
d. Mixed
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Answer
Explanation
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ANSWER: Separated
Explanation:
No explanation is available for this question!
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9) In an octave frequency band, the ratio of f2 / f1 is equivalent to ________
a. 2
b. 4
c. 8
d. 10
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Answer
Explanation
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ANSWER: 2
Explanation:
No explanation is available for this question!
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10) Which unit is adopted for magnitude measurement in Bode plots?
a. Degree
b. Decimal
c. Decibel
d. Deviation
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Answer
Explanation
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ANSWER: Decibel
Explanation:
No explanation is available for this question!
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