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This mock test of Test: Automatic Control Systems - 2 for Electrical Engineering (EE) helps you for every Electrical Engineering (EE) entrance exam.
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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.

Solution:

QUESTION: 2

Lag compensation permits a high gain at low frequencies.

Solution:

QUESTION: 3

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

Solution:

QUESTION: 4

If the poles lie in second quadrant, damping ratio is

Solution:

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.

Solution:

QUESTION: 6

Integral control action

Solution:

QUESTION: 7

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

Solution:

QUESTION: 8

Robotic manipulator arms mostly use

Solution:

QUESTION: 9

The sensor generally used in incremental optical encoder is

Solution:

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

Solution:

QUESTION: 11

For type 1 system the velocity lag error is

Solution:

QUESTION: 12

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

Solution:

QUESTION: 13

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

Solution:

QUESTION: 14

Nyquist stability criterion uses open loop frequency response characteristics.

Solution:

QUESTION: 15

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

Solution:

QUESTION: 16

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

Solution:

QUESTION: 17

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

Solution:

QUESTION: 18

The M circle for M = 1 is the

Solution:

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

Solution:

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.

Solution:

QUESTION: 21

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

Solution:

QUESTION: 22

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

**Reason (R):**

Solution:

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.

Solution:

QUESTION: 24

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

Solution:

QUESTION: 25

Transport lag usually exists in

Solution:

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