1. The transfer function of a system is 2s2 + 6s + 5(s + 1)2 (s + 2) The characteristic equation of the system is

A. 2s2 + 6s + 5 = 0

B. (s + 1)2 (s + 2) = 0

C. 2s2 + 6s + 5 + (s + 1)2 (S + 2) = 0

D. 2s2 + 6s + 5 ? (s + 1)2 (s + 2) = 0

2. By a suitable choice of the scalar parameter K, the system shown in the figure given below, can be made to oscillate continuously at a frequency of

A. 1 rad/s

B. 2 rad/s

C. 4 rad/s

D. 8 rad/s

3. For a gain constant K, the phase-lead compensator

A. reduces the lope of the magnitude curve in the entire range of frequency domain

B. decrease the grain cross-over frequency

C. reduce the phase margin

D. reduce the resonance peak M.

4. Give a system represented by equations 0 x + [1] x=[_2 1_2 _3]0 ans y =1101x The equivalent transfer function representation G(s) of the system is 1

A. G(s) = 2s +5s+21

B. G(s) ? s2

C.+ 3s + 2 3

D.C G(s) ? 2s + 3s + 23

5. Consider the following properties attributed to state model of a system : 1. State model is unique 2. State model can be derived from the system transfer function 3. State model can be derived from time variant systems. Of these statements

A. 1, 2 and 3 are correct

B. 1 and 2 are correct

C. 2 and 3 are correct

D. 1 and 3 are correct

6. The ac motor used in servo applications is a

A. single-phase induction motor

B. two-phase induction motor

C. three-phase induction motor

D. synchronous motor

7. In position control systems, the device used for providing rate-feedback voltage is called

A. potentiometer

B. Synchro-transmitter

C. synchro-transformer

D. tachogenerator

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