A dc distribution system is shown in Figure with load currents as marde. The two ends of the feeder are fed by voltage sources such that VP- VQ The value of the voltage VP for a minimum voltage of 220 V at any point along the feeder is

1.  225.89V

2.  222.89V

3.  220.0V

4.  228.28V

View Answer  
4
Correct Answer :

220.0V


Explanation :
No Explanation available for this question

A distribution system shown in the figure below. The point of minimum potential along the tract from A will be

1.  4 m

2.  3.67 m

3.  2.4 m

4.  0 m

View Answer  
4
Correct Answer :

3.67 m


Explanation :
No Explanation available for this question

A single phase AC distributor supplies two single phase loads as shown in the given figure. The voltage drop from A to C is

1.  4.5 V

2.  30 V

3.  31.5 V

4.  20 V

View Answer  
4
Correct Answer :

31.5 V


Explanation :
No Explanation available for this question

The current in the primary of the given transformer is

1.  10 A

2.  10/√2 A

3.  10/√3 A

4.  none of these

View Answer  
4
Correct Answer :

10/√3 A


Explanation :
No Explanation available for this question

Reflection coefficient for the transmission line shown in the given figure, is

1.  +1

2.  -1

3.  0

4.  0.5

View Answer  
4
Correct Answer :

0


Explanation :
No Explanation available for this question

What is the capacitance per km

1.  8.9 x 10-9 F/km

2.  9.2 x10-6 F/km

3.  11.5 x 10-9 F/km

4.  7.5 x 10-7 F/km

View Answer  
4
Correct Answer :

8.9 x 10-9 F/km


Explanation :
No Explanation available for this question

A three phase circuit line consists of 7/4.7.5 mm hard drawn copper conductors. The arrangement is shown in the figure. The line is completely transposed. What is the inductance, per phase per km of the system

1.  0.90 mH/km

2.  0.21 mH/km

3.  0.57 mH/km

4.  0.64 mH/km

View Answer  
4
Correct Answer :

0.64 mH/km


Explanation :
No Explanation available for this question

A double circuit 1- line is shown in the figure. Conductors α1 and α2 forming one path are connected in parallel and carry the current in one direction b1 and b2 forming the return path are connected in parallel and carry current in the one direction. If D1=1m, D2 = 2m, the total inductance of the line per km will be

1.  0.75 mH/km

2.  1.05 mH/km

3.  1.22 mH/km

4.  1.68 mH/km

View Answer  
4
Correct Answer :

1.22 mH/km


Explanation :
No Explanation available for this question

A three phase, 50 Hz transmission line consists of three equal conductors of radii r placed in a horizontal plane with a spacing of 6 m between outer middle and each outer conductor. If radius of each conductor is 12.5 mm, then indutance per phase per km of the transposed line will be

1.  1.33 mH/km

2.  1.54 mH/km

3.  0.28 mH/km

4.  2.71 mH/km

View Answer  
4
Correct Answer :

1.33 mH/km


Explanation :
No Explanation available for this question

What is the inductance per km per phase of a single circuit 460 kV line using two bundle conductors per phase as shown in the figure, if diameter of each conductor is 5cm

1.  0.24 mH/krn/ph

2.  0.76 mH/km/ph

3.  0.89 mH/km/ph

4.  0.90 mH/km/ph

View Answer  
4
Correct Answer :

0.89 mH/km/ph


Explanation :
No Explanation available for this question
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