232.  The transfer function of a system is 1 + s When operated as a unity feedback system, the steady state error to a unit step input will be transfer function Cc(s) ?(1 + 0.01s) The maximum phase angle lead provided by this compensator will occur at a frequency com is equal to
A. 50 rad/sec
B. 25 rad/sec
C. 10 rad/sec
D. 4 rad/sec

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233.  Signal flow graph is used to obtain the
A. stability of the system
B. transfer function of the system
C. controllability of the system
D. observability of the system

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234.  The effect of distance-velocity lag/ transportation lag is
A. to increase the phase margin
B. to reduce the phase margin
C. to alter the gain at a given to
D. to improve the transient response of the system

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235.  Sinusoidal oscillators are
A. stable
B. unstable
C. marginally stable
D. conditionally stable

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236.  If the gain of the open-loop system is doubled, the gain margin
A. is not affected
B. gets doubled K(s + 2)
C. marginally stable
D. conditionally stable

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237.  Given G(s) = s(s + 2) the transfer function is operated in a closed loop with unity feedback. The closed loop system is
A. stable
B. unstable
C. marginally stable
D. conditionally stable

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238.  The transfer function of transportation lag is Ca. If the lag is small as compared with the time constant of the system, it can be approximated by
A. sT
B. 1 + sT
C. 1 ? sT
D.1 + sT

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