Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

A system is highly oscillatory if
A:
gain margin is high
B:
gain margin is close to 1
C:
gain margin is close to 1 or phase margin is zero
D:
gain margin is high and phase margin is 180°
Answer: C
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Assertion (A): In an automobile the amount of fuel admitted to the engine is adjusted as per the difference between desired and actual speed.

Reason (R): The control signal is the amount of fuel to be admitted to the engine.

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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For a closed loop system
The imaginary axis intercept of the root loci will be
A:
± j 2.8
B:
± J 0.28
C:
± j 1.14
D:
± j 11.4
Answer: A
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The constant magnitude of G(s) plane are
A:
a family of straight horizontal lines
B:
a family of straight inclined lines with positive slope
C:
a family of straight inclined lines with negative slope
D:
a family of circles
Answer: D
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Transport lag usually exists in
A:
thermal systems
B:
hydraulic systems and thermal systems
C:
pneumatic systems
D:
thermal, hydraulic and pneumatic systems
Answer: D
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