Electrical Engineering (EE) > Test: Automatic Control Systems - 2

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Test: Automatic Control Systems - 2 - Question 1

**Assertion (A):** If points at infinity are included, G(*s*) has same number of poles and zeros.

**Reason (R):** The function has a zero at *s* = - 2.

Test: Automatic Control Systems - 2 - Question 2

Lag compensation permits a high gain at low frequencies.

Test: Automatic Control Systems - 2 - Question 3

If the characteristic equation is (λ + 1) (λ + 2) (λ + 3) = 0, the eigen values are

Test: Automatic Control Systems - 2 - Question 4

If the poles lie in second quadrant, damping ratio is

Test: Automatic Control Systems - 2 - Question 5

**Assertion (A):** When performance specifications are given in term of transient response characteristics, root locus method is a suitable method.

**Reason (R):** When performance specifications in terms of state variables are given, modern control methods can be used.

Test: Automatic Control Systems - 2 - Question 7

If , the closed loop pole will be located at *s* = -12 when K =

Test: Automatic Control Systems - 2 - Question 9

The sensor generally used in incremental optical encoder is

Test: Automatic Control Systems - 2 - Question 10

In terms of ξ and ω_{n} the settling time of a second order systems for 2% criterion and step input is equal to

Test: Automatic Control Systems - 2 - Question 12

For as ω approaches infinity, the magnitude approaches zero and phase angle approaches - 90�.

Test: Automatic Control Systems - 2 - Question 13

In the given figure, the combinations of two non touching loops is

Test: Automatic Control Systems - 2 - Question 14

Nyquist stability criterion uses open loop frequency response characteristics.

Test: Automatic Control Systems - 2 - Question 15

For any test point *s* on the real axis, the sum of angular contributions of the complex conjugate poles is

Test: Automatic Control Systems - 2 - Question 16

For the system in the given figure G varies slightly, the ratio of open loop sensitivity to closed loop sensitivity is

Test: Automatic Control Systems - 2 - Question 17

The loop transfer function of a feedback system is . The number of asymptotes of its root loci are

Test: Automatic Control Systems - 2 - Question 19

Which of the following can act as error detecting devices

- a pair of potentiometers
- a pair of synchros
- a differential transformer
- a metadyne
- a control transformer

Test: Automatic Control Systems - 2 - Question 20

**Assertion (A):** If minimum phase system has a gain margin of 8 *dB* and phase margin of 21º, the system is stable.

**Reason (R):** For a minimum phase system both GM and PM must be positive for the system to be stable.

Test: Automatic Control Systems - 2 - Question 21

For 0 < M < 1, the centres of M circle lie to the right of origin.

Test: Automatic Control Systems - 2 - Question 22

**Assertion (A):** Integration in time domain is converted into division in *s* domain

**Reason (R):**

Test: Automatic Control Systems - 2 - Question 23

**Assertion (A):** In root locus the breakaway and break in points either lie on real axis or occur in complex conjugate pairs.

**Reason (R):** All root locus asymptotes intersect on real axis.

Test: Automatic Control Systems - 2 - Question 24

A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

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