DBATU Model MCQ - Control System

Welcome to your Control System, dated April 19, 2021

1. Find out the Transfer function for the closed loop control system given below

Deselect Answer

G(s)/(1+G(s)*H(s))

G(s)/(1- G(s)*H(s))

G(s)+H(s)

G(s)-H(s)

2. Signal flow graph is used to find _________Deselect Answer

Stability of the system

Controllability of the system

Transfer function of the system

Poles of the system

3. Gain cross - over frequency is defined asDeselect Answer

|G(jω)H(jω)|=1

|G(jω)H(jω)|=0

|G(jω)H(jω)|=∞

|G(jω)H(jω)|=1/2

4. The Transfer function C/R of the block diagram given below is

Deselect Answer

G1+(G2/(1+G2H1+H2))

G1 G2/(1+G1 H2 H1 H2)

G1 G2/( G2H1+ G1 G2 H2+1)

G1 G2/(1+G2 H1+ G1 H2)

5. A unity feedback system has Open loop Transfer system (s+1), Then Closed loop Transfer function isDeselect Answer

s+1

s-1

s-1/s+3

s+1/s+2

6. A system with transfer function G(s) = (s-5)(s-7). Then the zeros are located atDeselect Answer

s = 1, s=-j+5

s = 5, s = 7

s = j-5 , s = j-7

s = j+5 , s = j+7

7. Find out the Transfer function for the given Pole – Zero plot

Deselect Answer

s-1/s+2

s+1/s-2

s+1/s2+4s+5

s+j/s+2

8. For the first order system having Transfer system 1/(1-sT),the unit impulse response isDeselect Answer

e –t/T

T e –t/T

(1/T) * e t/T

T2 e –t/T

9. As compared to a Closed loop system an Open loop system isDeselect Answer

More stable as well as more accurate

Less stable as well as less accurate

Less stable but more accurate

More stable but less accurate

10. Phase margin of a system is used to specifyDeselect Answer

Relative stability

Absolute Stability

Time Response

Frequency response

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