Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

In liquid flow system the capacitance of a water tank is defined as
A:
B:
C:
D:
none of the above
Answer: A

Electrical and dQ is analogous to change in amount of liquid and dv is analogous to change in head.

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Assertion (A): When the phase margin of a control system is improved using a lead network, noise transmission increases.

Reason (R): Phase lead compensation increases bandwidth.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
R is correct but A is wrong
Answer: A

More bandwidth means more noise.

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For op-amp circuit of the given figure, Eo(s)/Ei(s) =
A:
B:
C:
D:
Answer: D

.

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For quadratic factor. In Bode log magnitude plot the high frequency asymptote is a straight line having the slope
A:
-20 dB per decade
B:
+20 dB per decade
C:
-40 dB per decade
D:
+40 dB per decade
Answer: C

For quadratic factor in denominator, slope at high frequencies is - 40 dB/decade.

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The resistance R of a liquid flow system is defined as
A:
B:
C:
change in level difference x change in flow rate
D:
non of the above
Answer: B

Electrical resistance , level difference or head is analogous to v and change in flow rate is analogous to current.

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