Question:

Derivative error compensation:

A.

improvement in transient response

B.

reduction in steady state error

C.

reduction is settling time

D.

increase in damping constant

Answer» d. increase in damping constant

Question:

Lag-lead compensation is a:

A.

increases bandwidth

B.

attenuation

C.

increases damping factor

D.

second order

Answer» d. second order

Question:

Rate compensation :

A.

increases bandwidth

B.

attenuation

C.

increases damping factor

D.

second order

Answer» c. increases damping factor

Question:

A system has poles at 0.01 Hz, 1 Hz and 80Hz, zeroes at 5Hz, 100Hz and 200Hz. The approximate phase of the system response at 20 Hz is :

A.

-90°

B.

0° c) 90°

C.

d) -180°

Answer» a. -90°

Question:

Addition of zero at origin:

A.

improvement in transient response

B.

reduction in steady state error

C.

reduction is settling time

D.

increase in damping constant

Answer» a. improvement in transient response

Question:

Constant N-loci:

A.

constant gain and constant phase shift loci of the closed-loop system.

B.

plot of loop gain with the variation in frequency

C.

circles of constant gain for the closed loop transfer function

D.

circles of constant phase shift for the closed loop transfer function

Answer» c. circles of constant gain for the closed loop transfer function

Question:

In polar plots, if a pole is added at the origin, what would be the value of the magnitude at Ω = 0?

A.

zero

B.

infinity

C.

unity

D.

unpredictable

Answer» b. infinity

Question:

Constant M- loci:

A.

constant gain and constant phase shift loci of the closed-loop system.

B.

plot of loop gain with the variation in frequency

C.

circles of constant gain for the closed loop transfer function

D.

circles of constant phase shift for the closed loop transfer function

Answer» d. circles of constant phase shift for the closed loop transfer function

Question:

The addition of open loop poles pulls the root locus towards:

A.

the right and system becomes unstable

B.

imaginary axis and system becomes marginally stable

C.

the left and system becomes unstable

D.

the right and system becomes unstable

Answer» d. the right and system becomes unstable