# A unity-feedback control system has the open-loop transfer function G(s)=4(1+2s)/s2(s+2) If input to the system is a unity ramp, then steady-state error will be

1.  0

2.  0.5

3.  2

4.  infinity

4

0

Explanation :
No Explanation available for this question

# What is the efficiency.

1.  93.5%

2.  87%

3.  98.5%

4.  96%.

4

93.5\%

Explanation :
No Explanation available for this question

# The steady state error of a stable type 0 unity feedback system, for a unit step function is

1.  0

2.  1/1+Kp

3.  ∞

4.  1/Kp

4

1/1+Kp

Explanation :
No Explanation available for this question

# The output of a linear time invariant control system is c(t) for a certain input r(t). If r(t) is modified by passing it through a block whose transfer function is e-s and then applied to the system, the modified output of the system would be

1.  c(t)/1+et

2.  c(t)/1+e-t

3.  c(t-1)u(t-1)

4.  c(t)u(t-1)

4

c(t)u(t-1)

Explanation :
No Explanation available for this question

# The voltage regulation of the transmission line using π method is

1.  16.2%

2.  17.4%

3.  19.4%

4.   2%

4

17.4\%

Explanation :
No Explanation available for this question

# For what value of 'a' does the system shown in the figure have a zero steady state error[i.e.,] for a step input

1.  a=0

2.  a=2

3.  a>=4

4.  for no value of 'a'

4

a=0

Explanation :
No Explanation available for this question

# A single circuit 50 Hz, 3- transmission line has the following parameters per km. R=0.2Ω,L = 1.3mH,C = 0.01 F The efficiency of the line, if the line is 120 km long and deliver 40 mW at 132 kV and 0.8 pf lagging will be

1.  85.4%

2.  90.0%

3.  92.6%

4.   98%

4

92.6\%

Explanation :
No Explanation available for this question

# The transfer function of a system is G(s) =100 /(s +1)(s + 100) For a unit-step input to the system, the approximate setting time for 2% criterion is

1.  100 sec

2.  4 sec

3.  1sec

4.  0.01 sec

4

4 sec

Explanation :
No Explanation available for this question

# In the above question find the sending end, voltage of the transmission line

1.  60.8 kV/ph

2.  75.0 kV/ph

3.  80.14 kV/ph

4.  86.314 kV/ph

4

86.314 kV/ph

Explanation :
No Explanation available for this question

# The characteristic polynomial of a system is, q(s) = 2s5+ s4 + 4s3 + 2s2 + 2s + 1. The system is

1.  stable

2.  marginally stable

3.  unstable

4.  oscillatory

4