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ELECTRICAL ENGINEERING PAPER-I

(www.entrance-exam.net)-IES papaer 2003.pdf (Size: 267.29 KB / Downloads: 67)

1. Consider the following statements with

reference to a system with velocity error

constant Ky = 1000

1. The system is stable.

2. The system is of type 1

3. The test signal used is a step input.

Which of these statements are correct?

a. 1 and 2

b. 1 and 3

c. 2 and 3

d. 1, 2 and 3

2. Which one of the following statements is

NOT of correct?

a. With the introduction of integral

control, the steady state error increases

b. The generalised error coefficients

provide a simple way of determining

the nature of the response of a

feedback control to any arbitrary input

c. The generalized error coefficients lead

to calculation of complete steady state

response without actually solving the

system differential equation

d. For a type-1 system, the steady state

error for acceleration input is infinite

3. Consider the following statements with

reference to the root loci of the

characteristic equation of unity feedback

control system with an open loop transfer

function of

( ) ( 1)( 3)( 5)

( 2)

G s K s s s

s s

1. Each locus starts at an open loop pole

and ends either at an open loop zero or

infinity

2. Each locus starts at an open loop pole

or infinity and ends at an open loop

zero.

3. There are three separate root loci.

4. There are five separate root loci.

Which of these statements are correct ?

a. 2 and 3

b. 2 and 4

c. 1 and 3

14. Match List I with List II and select the

correct answer:

List I (Component)

A. Input potentiometer in d.c. system

B. Synchro pair in a.c. system

C. Motor

D. Feedback tachogenerator

List II (Purpose)

1. Actuator

2. Error detector

3. Transducer

A B C D

a. 3 2 3 1

b. 2 3 1 3

c. 2 3 3 1

d. 3 2 1 3

15. Which one of the following statements is

NOT correct?

a. The action of bellows in pneumatic

control system is similar to that of a

spring

b. The flapper value converts large

changes in the position of the flapper

into small changes in the back pressure

c. The common name of pneumatic

amplifier is pneumatic relay

d. The transfer function of a pneumatic

actuator is of the form :