Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

For the system in the given figure . Then steady state error is
A:
B:
K
C:
Zero
D:
1
Answer: C
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A feedback amplifier has forward gains A1, A2 and feedback factor β as shown in signal flow graph of the given figure. Because of feedback as shown in signal noise ratio at output will
A:
increase
B:
decrease
C:
be unaffected
D:
depend on value of β
Answer: C
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Coulomb friction is
A:
the force of sliding friction between dry surfaces
B:
the force of friction between moving surfaces separated by viscous fluid
C:
the force required to initiate motion between two contacting surfaces
D:
all of the above
Answer: A
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For a second order system delay time td is the time required to reach
A:
half the final value for the very first time
B:
the final value for the very first time
C:
90% of the final value for the very first time
D:
none of the above
Answer: A
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Assertion (A): Inverse Laplace transform can be found from P(s) by inversion integral.

Reason (R): The function f(t) is assumed to be zero for t < 0.

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: B
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