Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

Consider the following statements:
The gain margin and phase margin of an unstable system may respectively be
  1. positive, positive
  2. positive, negative
  3. negative, positive
  4. negative, negative
Of these statements
A:
1, 4 are correct
B:
1 and 2 correct
C:
1, 2, 3 are correct
D:
2, 3, 4 are correct
Answer: D

For stable system both must be positive.

📖
📝
💬
👁️
The given figure shows three Nyquist plots of G(s) H(s) = e-sT/[s(s + 1)] for different values of T. The curves 1, 2, 3 can be
A:
for T = 0, 0.5 and 1 respectively
B:
for T = 1, 0.5 and 0 respectively
C:
for T = 0.5, 1 and 0 respectively
D:
for T = 0, 1 and 0.5 respectively
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
The action of bellows is similar to that of
A:
mass
B:
viscous friction
C:
spring
D:
none of the above
Answer: C

Spring and bellows convert force into displacement.

📖
📝
💬
👁️
The number of branches of root locus plot is equal to
A:
the number of roots of characteristic equation
B:
double the number of roots of characteristic equation
C:
the number of roots of characteristic equation minus one
D:
the number of roots of characteristic equation plus one
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
In the given figure, P = Pm sin ωt. Then X(s) =
A:
B:
C:
D:
Answer: A

If P = Pm, sin ω .

📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz