Recent questions tagged lines

1 answer 11 views

Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.

asked Sep 4, 2018 by Shimroz123
1 answer 14 views

Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.

asked Aug 8, 2018 by Quiz
1 answer 391 views

In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

asked May 8, 2018 in Electric Power Transmission by Shimroz123
1 answer 82 views

The purpose of guard ring in transmission lines is to  (1) reduce the earth capacitance of the lowest unit. (2) increase the earth capacitance of the lowest unit. (3) reduce the transmission lines losses. (4) reduce the reactance of the line

asked May 1, 2018 in Electric Power Transmission by Shimroz123
1 answer 22 views

A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are :  (A) less than 66 kV (B) lie between 66 kV and 110 kV (C) more than 165 kV (D) lie between 110 kV and 165 kV

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 8 views

In tuned power lines, on load :  (A) the receiving end voltage is numerically equal to the sending end voltage  (B) the receiving end current is numerically equal to the sending end current  (C) there is no voltage drop  (D) all the above

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 14 views

Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 27 views

Corona loss in transmission lines can be reduced by (A) using small diameter conductors (B) using bundled conductors (C) using less spacing between conductors (D) increasing the transmission line voltage

asked Apr 28, 2018 in Power system by Shimroz123
1 answer 106 views

If a 5-bus test system contains 6 transmission lines and one transformer, how many non-zero elements are there in the system Y-bus ? (A) 25 (B) 12 (C) 11 (D) 19

asked Apr 28, 2018 in Power system by Shimroz123
1 answer 142 views

Why ACSR conductor is used for overhead lines?

asked Mar 10, 2018 in Electric Power Distribution by Quiz
0 answers 31 views

What is a safe distance from power lines?

asked Mar 10, 2018 in High voltage engineering by Quiz
0 answers 35 views

How many volts are in the power lines?

asked Mar 10, 2018 in Advanced electrical power system by Quiz
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