The value of derivative feedback constant a, which will increase the damping ratio of the system to 0.7 is

1.  0.152

2.  0.245

3.  0.353

4.  0.558

View Answer  
4
Correct Answer :

0.245


Explanation :
No Explanation available for this question

In the given system,if α=0.1 then state error to unity ramp input will be

1.  0.16

2.  0.25

3.  0.35

4.  0.49

View Answer  
4
Correct Answer :

0.35


Explanation :
No Explanation available for this question

Consider the following statements regarding time domain analysis of a control system : 1.Derivative control improves system's transient performance 2. Integral, control does not improve system steady State performance . 3. Integral. control can convert a second order system into a third order system. Of these statements

1.  1 and 2 are correct

2.  1 and 3 are correct

3.  2 and 3 are correct

4.  1, 2 and 3 are correct

View Answer  
4
Correct Answer :

1 and 3 are correct


Explanation :
No Explanation available for this question

A three phase synchronous generator delivers 10 mvA, at a voltage of 10.5 kV. The line impedance is 5Ω. What is the voltage drop in the line in per unit and in volts Use the reference base as 12 mVA at 11 kV.

1.  549.36A, 1.25 kV

2.  539.46A, 2.81 kV

3.  549.36A, 2746.8 kV

4.  549.36A, 2.0 kV

View Answer  
4
Correct Answer :

549.36A, 2746.8 kV


Explanation :
No Explanation available for this question

In the system shown in the figure, r(t) = sin ωt The steady-state response c(t) will exhibit resonance peak at a frequency of

1.  4 rad/sec

2.  2 √2 rad/sec

3.  2 rad/sec

4.  √2 rad/sec

View Answer  
4
Correct Answer :

2 √2 rad/sec


Explanation :
No Explanation available for this question

A single phase load of 200 kVA, is delivered at 2500 V over a transmission line having a R = 1.4Ω, X = 0.8Ω. What is the voltage at the sending end, when the power factor of the load is 0.8 lagging

1.  2.627 kV

2.  2.069 kV

3.  2.840 kV

4.  3.54 kV

View Answer  
4
Correct Answer :

2.627 kV


Explanation :
No Explanation available for this question

A 1-Φ load of 200 kVA is delivered at 2500V over a transmission line having R = 1.4Ω, X = 0.8Ω. What is the power at, the sending end when the power factor of the load is 0.8 leading

1.  0.8 leading

2.  0.82 (leading)

3.  0.82 (lagging)

4.  0.6 (lagging)

View Answer  
4
Correct Answer :

0.82 (leading)


Explanation :
No Explanation available for this question

For the system shown in the figure, with a damping ratio of 0.7 and undamped natural frequency of 4 rad /sec, the values of K and a are

1.  K=4,α=0.35

2.  K=8,α=0.455

3.  K=16,α=0.255

4.  K=64,α=0.9

View Answer  
4
Correct Answer :

K=16,α=0.255


Explanation :
No Explanation available for this question

A three phase line, 20 km long, delivers 10 MW at 11kV, 50 Hz, 0.8 power factor lagging. The power losses in the line is 10 percent of the power delivered. The resistance of the each conductor will be

1.  0.86Ω

2.  1.54 Ω

3.  2.14Ω

4.  0.774Ω

View Answer  
4
Correct Answer :

0.774Ω


Explanation :
No Explanation available for this question

What is the value of k for a unity feedback system with G(s)=k/s(1+s) to have a peak overshoot of 50%

1.  0.53

2.  5.3

3.  0.6

4.  0.047

View Answer  
4
Correct Answer :

0.53


Explanation :
No Explanation available for this question
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