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Recent questions tagged line

1 answer 27 views

Is the power line voltage available in our homes a dc or an ac voltage?

asked Jun 29 by Shimroz123
1 answer 2 views

Define load and line regulation.

asked Sep 5, 2018 by Shimroz123
2 answers 50 views

Write the relation between phase and line current, phase and line voltage for Star connection.

asked Aug 11, 2018 in Basic electrical and electronics engineering by Quiz
0 answers 50 views

What is line voltage and phase voltage? Draw balanced three phase star connected system. Show all the voltages and currents.

asked Aug 11, 2018 in Basic electrical and electronics engineering by Quiz
1 answer 122 views

A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9 

asked Jun 18, 2018 in Electrical Engineering by Shimroz123
1 answer 26 views

The command line interpreter that enables the users to interact with operating system is called the A) Window B) Shell C) Process D) Kernel 

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 30 views

Stability of a transmission line can be increased by

asked May 8, 2018 in Electric Power Transmission by Shimroz123
1 answer 27 views

The sag of a transmission line is least affected by (A) Self weight of the conductor. (B) Temperature of the surrounding air. (C) Current through the conductor. (D) Ice deposited on the conductor.

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 135 views

Shunt compensation in an EHV line is used to (A) Improve stability. (B) Improve the voltage profile. (C) Reduce the fault level. (D) Substitute for synchronous phase modifier.

asked May 8, 2018 in Power system by Shimroz123
1 answer 115 views

In a transmission line if booster transformers are to be used, preferred location will be  (A) At the receiving end (B) At the sending end (C) At the intermediate point (D) Anywhere in the line 

asked May 8, 2018 in Electric Power Transmission by Shimroz123
1 answer 24 views

For 11kV line the inductance per km per phase will be of the order of:  (A) 1 H (B) 0.1 H (C) 1 mH (D) 0.1 mH

asked May 8, 2018 in Electric Power Transmission by Shimroz123
1 answer 89 views

A transmission line has 1 P.0 impedance on a base of 11 KV, 100 MVA. On a base of 55 KV. it will have a P.0 impedance of

asked May 3, 2018 in Electric Power Transmission by Shimroz123
1 answer 22 views

The surge impedance for over head line is taken as  (1) 10-20 ohms (2) 50-60 ohms (3) 100-200 ohms (4) 1000-2000 ohms

asked May 1, 2018 in Switchgear And Protection by Shimroz123
1 answer 43 views

For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 19 views

A transmission line of 200 km has a certain A, B, C and D parameters. If the length is reduced to 60 km

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

If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then  (A) zero sequence currents are present on both sides of the transformer  (B) zero sequence currents are absent on both sides of the transformer  (C) zero sequence currents are present on the secondary side but not on the primary side  (D) zero sequence currents are present on the primary side but not on the secondary side

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 19 views

A lightening arrester connected between the line and earth in a power system  (1) protects the terminal equipment against travelling surges (2) protects the transmission line against direct lightening strokes (3) suppresses high frequency oscillations in the line (4) reflects back the travelling wave approaching it

asked Apr 29, 2018 in Switchgear And Protection by Shimroz123
1 answer 27 views

Series capacitive compensation in EHV transmission line is used to

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 35 views

For a 500 Hz frequency excitation, a 50 km long power line will be modeled as

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 16 views

The line current in a balanced delta system is 30 A. The load current is (A) 30√3 A (B) 30/√3 A (C) 10 A (D) 30/√2 A

asked Apr 28, 2018 in Network Analysis by Shimroz123
1 answer 13 views

The ALE line of an 8085 microprocessor is used to (A) latch the output of an I/O instruction into an external latch. (B) deactivate the chip-select signal from memory devices. (C) find the interrupt enable states of the TRAP interrupt. (D) latch the 8 bits of address lines AD7-AD0 into an external latch.

asked Apr 28, 2018 in Digital Electronics by Shimroz123
2 answers 95 views

The sending end and receiving end voltages of a three-phase transmission line are 10 kV/ph and 9.5 kV/ph, respectively. If the resistance drop is 150 V/ph and receiving end power factor is 0.8, the sending end power factor is (A) 0.745 lagging (B) 0.775 lagging (C) 0.8 lagging (D) 0.85 lagging

asked Apr 28, 2018 in Power system by Shimroz123
1 answer 54 views

The reactive power transfer over a line mainly depends on

asked Apr 27, 2018 in Switchgear And Protection by Shimroz123
1 answer 24 views

The unit circle of the Nyquist plot transforms into unity or 0 dB line of the amplitude plot of the Bode diagram for

asked Apr 26, 2018 in Control System by Shimroz123
1 answer 25 views

lf a travelling-wave travelling along a loss-less overhead line does not result in any reflection after it has reached the far end, then the far end of the line is

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123
1 answer 23 views

Transmission efficiency of a transmission line increases with the

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123
2 answers 38 views

Pure inductive circuit takes power from the A.C. line when?

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
0 answers 27 views

Explain single line diagram.

asked Mar 11, 2018 in Computer techniques in power system by Quiz
2 answers 21 views

What is a high tension power line?

asked Mar 10, 2018 in Extra high voltage transmission by Quiz
0 answers 14 views

What are the losses in a transmission line?

asked Mar 10, 2018 in High voltage engineering by Quiz
1 answer 31 views

What is the difference between line and phase current?

asked Mar 10, 2018 in High voltage engineering by Quiz
1 answer 49 views

What is the difference between line and phase voltage?

asked Mar 10, 2018 in High voltage engineering by Quiz
0 answers 63 views

What is the difference between a line voltage and low voltage control system?

asked Mar 10, 2018 in High voltage engineering by Quiz
4 answers 173 views

What is the voltage in 3 phase line?

asked Dec 22, 2017 in Fundamentals of electrical power systems by Quiz
2 answers 46 views

Asymmetric Digital Subscriber Line (ADSL)

asked Aug 25, 2017 in Digital Instrumentation by Zeeshan
1 answer 43 views

what is mean by medium transmission line ?

asked Aug 18, 2017 in Electrical Engineering by Zeeshan
1 answer 41 views

what is mean by short transmission line ?

asked Aug 18, 2017 in Electrical Engineering by Zeeshan
1 answer 41 views

what is mean by long transmission line ?

asked Aug 18, 2017 in Electrical Engineering by Zeeshan
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