Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

If ΔP is pressure difference, A is area of each flat surface, K is stiffness and Δx is displacement of movable surface from reference of bellows, then
A:
B:
C:
D:
Answer: C
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In case of synchro error detector the electrical zero position of control transformer is obtained when angular displacement between rotors is
A:
zero
B:
45°
C:
90°
D:
180°
Answer: C
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PID controlled system has
A:
P and I actions in forward path and D action in feedback path
B:
P and I actions in feedback path and actions in forward path
C:
All the three (i.e., P, I and D) actions in forward path
D:
All the three (i.e., P, I and D) actions in feedback path
Answer: A
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If a zero is added to a second order underdamped system
A:
the peak overshoot is increased
B:
the peak overshoot is decreased
C:
the peak overshoot remains unchanged
D:
either (a) or (b)
Answer: A
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Assertion (A): For a given system only one of the static error constants is finite and significant.

Reason (R): If finite static error constant is large, the loop gain becomes smaller as ω approaches zero.

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: C
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