how the booster is connected in transmission line ?

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asked Aug 18, 2017 by anonymous

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asked May 8, 2018 by anonymous

In a transmission line if booster transformers are to be used, preferred location will be

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

Last answer: In a transmission line if booster transformers are to be used, preferred location will be At the intermediate point

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208 views 1 answer

asked May 22, 2018 by anonymous

Why are shunt reactors connected at the receiving end of long transmission line system:

Why are shunt reactors connected at the receiving end of long transmission line system: (1) To increase the terminal voltage (2) To compensate voltage rise caused by capacitive charging at light load (3) To improve power factor (4) None of these

Last answer: Why are shunt reactors connected at the receiving end of long transmission line system: To compensate voltage rise caused by capacitive charging at light load

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79 views 1 answer

asked Dec 5, 2017 by anonymous

How many insulator disc used for 33 kV transmission voltage line?

Last answer: 5,As 33kv is Vrms

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103 views 1 answer

asked May 26, 2018 by anonymous

In an AC transmission line difference in phase of voltage at two ends of the line is due to

In an AC transmission line difference in phase of voltage at two ends of the line is due to (a) System voltage (b) Insulators (c) Resistance of line (d) Reactance of line

Last answer: reactance of line

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2.7k views 1 answer

asked May 26, 2018 by anonymous

Which of the following is used for power factor improvement in transmission line ?

Which of the following is used for power factor improvement in transmission line ? (a) Three phase induction (b) An overexcited three phase synchronous motor running on no load (c) Three phase AC series motor (d) Choke

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62 views 0 answers

asked May 26, 2018 by anonymous

Effect of increase in temperature in an overhead transmission line is

Effect of increase in temperature in an overhead transmission line is (a) to increase stress and length both (b) to decrease stress and length both (c) to decrease stress and increase length (d) None of the above

Last answer: D

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476 views 1 answer

asked May 26, 2018 by anonymous

The bundled conductor in EHV transmission line system provides

The bundled conductor in EHV transmission line system provides (a) increased inductance (b) reduced capacitance (c) increased capacitance (d) increased voltage gradient

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113 views 0 answers

asked May 26, 2018 by anonymous

The power loss in a transmission line depends on

The power loss in a transmission line depends on (a) current in the line. (b) resistance of the line. (c) length of the line. (d) All of the above

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55 views 0 answers

asked May 26, 2018 by anonymous

The presence of earth in case of overhead transmission line

The presence of earth in case of overhead transmission line (a) increases capacitance (b) increases inductance (c) decreases capacitance (d) decreases inductance

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227 views 0 answers

asked May 13, 2018 by anonymous

Galloping in transmission line conductors arises generally due to

Galloping in transmission line conductors arises generally due to - (A) asymmetrical layer of ice formation (B) vortex phenomenon in light winds (C) heavy weight of line conductors (D) adoption of horizontal conductor

Last answer: D

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948 views 2 answers

asked Oct 14, 2018 by anonymous

why there is a difference between the insulation on the beginning and end of transmission line ?

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asked May 26, 2018 by anonymous

Which of the following relations is true for long transmission line ?

Which of the following relations is true for long transmission line ? (a) VS = AVR – BIR (b) VS = BVR + AIR (c) VS = AVR + BIR (d) VS = BVR – AIR

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asked May 26, 2018 by anonymous

If diameter of each conductor of a transmission line is ‘d’, then the diameter of n-layer stranded conductor

If diameter of each conductor of a transmission line is ‘d’, then the diameter of n-layer stranded conductor will be (a) (2n – 1) d (b) (2n + 1) d (c) (3n – 1) d (d) (3n + 1) d

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asked May 26, 2018 by anonymous

The main consideration for operating transmission line at high voltage is

The main consideration for operating transmission line at high voltage is (a) to increase efficiency only. (b) to reduce power loss only. (c) to increase power transmission capability only. (d) All of the above

Last answer: to reduce power loss: this is because when power is generated, it is generated at a very low voltage but because it is going to be transported over a long distance it is needed to be increase in order to avoid losses on the way such as copper loss and Eddy loss.

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446 views 1 answer

asked May 25, 2018 by anonymous

A transmission line to be reciprocal, the condition is

A transmission line to be reciprocal, the condition is (a) A = D (b) AC – BD = 1 (c) AD – BC = 1 (d) AB – CD = 1

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72 views 0 answers

asked May 25, 2018 by anonymous

An overhead transmission line has a span of 260 m. The weight of the conductor is 0.68 kg/m. The maximum

An overhead transmission line has a span of 260 m. The weight of the conductor is 0.68 kg/m. The maximum allowable tension in the line is 1550 kg. Maximum sag of the line should be (a) 5.8 m (b) 4.6 m (c) 2.7 m (d) 3.7 m

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asked May 23, 2018 by anonymous

The input impedance of a short circuited loss less transmission line of characteristic impedance 50 Ohm is

Last answer: The input impedance of a short circuited loss less transmission line of characteristic impedance 50 Ohm is may be capacitive or inductive depending on the length of the line

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92 views 1 answer

asked May 22, 2018 by anonymous

What type of insulator will be used if the direction of the transmission line is to be changed?

Last answer: Suspension type of insulator will be used if the direction of the transmission line is to be changed.

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111 views 1 answer

asked May 22, 2018 by anonymous

Earth wire on EHV overhead transmission line is provided to protect the line against:

Last answer: Earth wire on EHV overhead transmission line is provided to protect the line against: lightening surge

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137 views 1 answer

asked May 22, 2018 by anonymous

In case of a ‘High Voltage DC’ transmission, how many minimum conductors are required?

Last answer: In case of a ‘High Voltage DC’ transmission, how many minimum conductors are required? one

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135 views 1 answer

asked May 13, 2018 by anonymous

The inductance of single phase two wire power transmission line per km gets doubled when the

The inductance of single phase two wire power transmission line per km gets doubled when the (a) Distance between wires is doubled (b) Distance between the wires is increased four fold (c) Distance between the wires is increased as square of the original distance (d) Radius of the wire is doubled

Last answer: The inductance of single phase two wire power transmission line per km gets doubled when the Distance between the wires is increased as square of the original distance

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592 views 1 answer

asked May 13, 2018 by anonymous

The inductance of a power transmission line increases with

The inductance of a power transmission line increases with (A) decrease in line length. (B) increase in conductor diameter. (C) increase in spacing between phase conductors. (D) increase in load current carried by conductors.

Last answer: The inductance of a power transmission line increases with increase in spacing between phase conductors.

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528 views 1 answer

asked Jun 4, 2018 by anonymous

A long transmission line has considerable ……………….. effect.

A long transmission line has considerable ……………….. effect. A) series capacitance B) shunt capacitance C) series inductance D) shunt inductance

Last answer: Shunt Capacitance.

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117 views 2 answers

asked Jun 4, 2018 by anonymous

A single-line-to-ground fault on a overhead transmission line creates

A single-line-to-ground fault on a overhead transmission line creates (A) voltage sag (B) voltage swell (C) over voltage (D) voltage flicker

Last answer: Creates overvoltage.

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89 views 1 answer

asked May 29, 2018 by anonymous

For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic

For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is: (1) 100 Ω (2) 50 Ω (3) 25 Ω (4) 10 Ω

Last answer: For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is: 10 Ω

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110 views 1 answer

asked May 22, 2018 by anonymous

To increase power transfer capability of a long transmission line, we should:

To increase power transfer capability of a long transmission line, we should: (1) Increase line resistance (2) Increase transmission voltage (3) Decrease line reactance (4) Both (2) & (3)

Last answer: To increase power transfer capability of a long transmission line, we should: (1) Increase line resistance (2) Increase transmission voltage (3) Decrease line reactance (4) Both (2) & (3)

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82 views 1 answer

asked May 8, 2018 by anonymous

Stability of a transmission line can be increased by

Last answer: Stability of a transmission line can be increased by Shunt capacitor, Series capacitor

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260 views 1 answer

asked May 3, 2018 by anonymous

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

Last answer: 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 0.02 P.U

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359 views 1 answer

asked May 25, 2018 by anonymous

A 20-MVA, 6.6-kV, 3-phase alternator is connected to a 3-phase transmission line. The per unit

A 20-MVA, 6.6-kV, 3-phase alternator is connected to a 3-phase transmission line. The per unit positive-sequence, negative-sequence and zero-sequence impedances of the alternator are j0.1, j0.1 and j0.04 respectively. The neutral of the alternator is connected to ground through an inductive reactor of j0.05 p.u. The per unit positive-, ... The voltage of the alternator neutral with respect to ground during the fault is (A) 513.8 V (B) 889.9 V (C) 1112.0 V (D) 642.2 V

Last answer: A 20-MVA, 6.6-kV, 3-phase alternator is connected to a 3-phase transmission line. The per unit positive-sequence, negative-sequence and zero-sequence impedances of the alternator are j0.1, ... line. The voltage of the alternator neutral with respect to ground during the fault is 642.2 V

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2.7k views 1 answer

asked May 25, 2018 by anonymous

A generator is connected through a 20 MVA, 13.8/138 kV step down transformer, to a transmission line.

A generator is connected through a 20 MVA, 13.8/138 kV step down transformer, to a transmission line. At the receiving end of the line a load is supplied through a step down transformer of 10 MVA, 138/69 kV rating. A 0.72 pu. load, evaluated on load side transformer ratings as base values , is supplied from the above system. For system base values of 10 MVA and 69 kV in load circuit, the value of the load (in per unit) in generator will be (A) 36 (B) 1.44 (C) 0.72 (D) 0.18

Last answer: A generator is connected through a 20 MVA, 13.8/138 kV step down transformer, to a transmission line. At the receiving end of the line a load is supplied through a step down transformer of 10 MVA, 138/ ... MVA and 69 kV in load circuit, the value of the load (in per unit) in generator will be 36

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asked May 8, 2018 by anonymous

In case the height of transmission tower is increased, which of the following parameter is likely to change?

In case the height of transmission tower is increased, which of the following parameter is likely to change? (A) Resistance (B) Inductance (C) Capacitance (D) None of the above

Last answer: In case the height of transmission tower is increased, which of the following parameter is likely to change? (A) Resistance (B) Inductance (C) Capacitance (D) None of the above

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218 views 1 answer

asked May 1, 2018 by anonymous

The purpose of guard ring in transmission lines is to

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

Last answer: The purpose of guard ring in transmission lines is to reduce the earth capacitance of the lowest unit.

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1.1k views 1 answer

asked May 26, 2018 by anonymous

In long AC transmission lines, the receiving end voltage becomes greater than sending end voltage at light

In long AC transmission lines, the receiving end voltage becomes greater than sending end voltage at light load or no load operation. This is due to (a) Ferranti effect (b) Skin effect (c) Proximity effect (d) Corona effect

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asked May 8, 2018 by anonymous

In which of the following transmission lines, the value of the Shunt admittance should be

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

Last answer: 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

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445 views 1 answer

asked Aug 18, 2017 by anonymous

why we use aluminium conductor and not copper in transmission lines ?

Last answer: Because copper conductor are costlier than aluminium conductor

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82 views 1 answer

asked May 8, 2018 by anonymous

If 3000 kW power is to be transmitted over a distance of 30 km, the desirable transmission voltage will be.

If 3000 kW power is to be transmitted over a distance of 30 km, the desirable transmission voltage will be. (A) 11 kV (B) 33 kV (C) 66 kV (D) 132 kV

Last answer: By

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3.2k views 2 answers

asked May 26, 2018 by anonymous

The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the

The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is (a) 0.375 (b) 0.75 (c) 1.33 (d) None of these

Last answer: D

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742 views 2 answers

asked May 28, 2018 by anonymous

A 10 km long line has a characteristic impedance of 400 ohms. If line length is 100 km, the characteristic

A 10 km long line has a characteristic impedance of 400 ohms. If line length is 100 km, the characteristic impedance is: (1) 4000 Ω (2) 400 Ω (3) 40 Ω (4) 4 Ω

Last answer: A 10 km long line has a characteristic impedance of 400 ohms. If line length is 100 km, the characteristic impedance is: 400 Ω

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337 views 1 answer

asked May 13, 2018 by anonymous

Transmission of power by a.c. cables is impossible beyond

Transmission of power by a.c. cables is impossible beyond (a) 500 km (b) 300 km (c) 250 km (d) 45 km

Last answer: D

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247 views 2 answers

asked May 22, 2018 by anonymous

Consider the following statements: Over head transmission lines are provided with earth wires:

Consider the following statements: Over head transmission lines are provided with earth wires: 1 . To protect the transmission line from direct lightning strike 2. To protect the transmission line insulation from the indirect lightning strike 3. To balance the line currents 4. To provide path for neutral current Which of these statement/s is/are correct? (1) 1 and 3 (2) 1 and 4 (3) 1 only (4) 2 on|y

Last answer: Consider the following statements: Over head transmission lines are provided with earth wires: 1 . To protect the transmission line from direct lightning strike 2. To protect the transmission line insulation from the indirect lightning ... (1) 1 and 3 (2) 1 and 4 (3) 1 only (4) 2 on|y

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asked May 25, 2018 by anonymous

Shielding angle of an EHV line is about

Shielding angle of an EHV line is about (a) 20° (b) 50° (c) 70° (d) 90°

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107 views 0 answers

asked Jun 18, 2018 by anonymous

A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient?

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

Last answer: 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

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241 views 1 answer

asked May 25, 2018 by anonymous

For enhancing the power transmission in along EHV transmission line, the most preferred method is to

For enhancing the power transmission in along EHV transmission line, the most preferred method is to connect a (A) Series inductive compensator in the line (B) Shunt inductive compensator at the receiving end (C) Series capacitive compensator in the line (D) Shunt capacitive compensator at the sending end

Last answer: For enhancing the power transmission in along EHV transmission line, the most preferred method is to connect a Series capacitive compensator in the line

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172 views 1 answer

asked Apr 25, 2018 by anonymous

Surge impedance of overhead transmission line is normally in the order of

Surge impedance of overhead transmission line is normally in the order of (a) 1- 5 ohms (c) 300 - 500 ohms (b) 20 - 30 ohms (d) 300000 - 500000 ohms

Last answer: Surge impedance of overhead transmission line is normally in the order of 300 - 500 ohms

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194 views 1 answer

asked Apr 10, 2018 by anonymous

In terms of cost, overhead transmission line is better than underground transmission line in the field of

In terms of cost, overhead transmission line is better than underground transmission line in the field of (a) Insulation (b) Right of way (c) Visibility (d) None of these

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49 views 0 answers

asked Apr 9, 2018 by anonymous

The effect of corona in high voltage a.c. transmission line is ...

The effect of corona in high voltage a.c. transmission line is A) Increased energy loss in the transmission line B) Increased line reactance C) Increased line to line capacitance D) All of the above

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54 views 0 answers

asked May 24, 2018 by anonymous

The capacitor connected in series with the line is used to

The capacitor connected in series with the line is used to A) enhance power factor B) enhance power system capability C) decrease the losses D) decrease the power transfer

Last answer: The capacitor connected in series with the line is used to enhance power system capability

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47 views 1 answer

asked May 20, 2018 by anonymous

As shown in the figure, 1 ohm resistance is connected across a source that has a load line v + i = 100.

Last answer: As shown in the figure, 1 ohm resistance is connected across a source that has a load line v + i = 100. The current through the resistance is 50 A

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94 views 1 answer

asked May 15, 2018 by anonymous

In a Y-connected circuit, the magnitude of each line current is?

In a Y-connected circuit, the magnitude of each line current is? A.one-third the phase current B.three times the corresponding phase current C.equal to the corresponding phase current D.zero

Last answer: In a Y-connected circuit, the magnitude of each line current is? A.one-third the phase current B.three times the corresponding phase current C.equal to the corresponding phase current D.zero

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150 views 1 answer

asked Apr 12, 2018 by anonymous

In a Y -connected circuit, between each line -voltage and the nearest phase - voltage, there is a phase -angle of:

In a Y -connected circuit, between each line -voltage and the nearest phase - voltage, there is a phase -angle of: A. 0° B. 30° C. 60° D. 120°

Last answer: B

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2.7k views 2 answers

anonymous · Answer 1 · 2017-08-20T06:40:35+0000

answered Aug 20, 2017 by anonymous

Booster is connected in series with transmission line

how the booster is connected in transmission line ?

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