Corona loss can be reduced by the use of hollow conductors because?

Corona loss can be reduced by the use of hollow conductors because?

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1 Answer

Answer :

Corona loss can be reduced by the use of hollow conductors because of better ventilation in the conductor.

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Related questions

Corona loss in transmission lines can be reduced by

Description : 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

Last Answer : Corona loss in transmission lines can be reduced by using bundled conductors

The corona loss in a 50 Hz system is 0.25 kW/ph/km. At a frequency of 60 Hz, the corona loss

Description : The corona loss in a 50 Hz system is 0.25 kW/ph/km. At a frequency of 60 Hz, the corona loss would be   (a) 0.30 kW/ph/km (b) 0.36 kW/ph/km (c) 028 kW/ph/km (d) 0.21 kW/ph/km

Last Answer : The corona loss in a 50 Hz system is 0.25 kW/ph/km. At a frequency of 60 Hz, the corona loss would be 028 kW/ph/km

The corona loss on a particular system at 50 Hz is 1 kw/phase per km....

Description : The corona loss on a particular system at 50 Hz is 1 kw/phase per km. The corona loss on the same system with supply frequency 25 Hz will be?

Last Answer : The corona loss on a particular system at 50 Hz is 1 kw/phase per km. The corona loss on the same system with supply frequency 25 Hz will be 0.667 kW/phase/km.

Which statement out of the following statements about ‘corona’ is incorrect?

Description : Which statement out of the following statements about ‘corona’ is incorrect? A) Corona gives rise to radio interference B) Corona results in loss of power in transmission C) Corona discharge can be observed as red luminescence D) Corona is always accompanied by a hissing voice

Last Answer : Which statement out of the following statements about ‘corona’ is incorrect? A) Corona gives rise to radio interference B) Corona results in loss of power in transmission C) Corona discharge can be observed as red luminescence D) Corona is always accompanied by a hissing voice

Corona losses are minimized when?

Description : Corona losses are minimized when?

Last Answer : Corona losses are minimized when smooth conductor is reduced.

If the spacing between the conductors increases, the corona effect

Description : If the spacing between the conductors increases, the corona effect

Last Answer : If the spacing between the conductors increases, the corona effect Decreases

In direct cooled system using hydrogen both stator and rotor conductors are made (a) solid (b) hollow (c) perforated (d) any ofthe above

Description : In direct cooled system using hydrogen both stator and rotor conductors are made (a) solid (b) hollow (c) perforated (d) any ofthe above

Last Answer : (b) hollow

Hollow conductors are used in the transmission lines to:

Description : Hollow conductors are used in the transmission lines to:  (1) Improve heat dissipation (2) Reduce corona loss (3) Reduce skin effect (4) Reduce the line inductance

Last Answer : Hollow conductors are used in the transmission lines to: Reduce corona loss.

The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is

Description : The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is near the _______ of conductor.  (1) Surface (2) Center (3) Complete cross section area (4) Axis

Last Answer : The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is near the Surface of conductor. 

Whenever the conductors are dead-ended of there is a change in the ...

Description : Whenever the conductors are dead-ended of there is a change in the direction of a transmission line, the insulator. used are of the?

Last Answer : Whenever the conductors are dead-ended of there is a change in the direction of a transmission line, the insulator. used are of the strain type.

Bundled conductors are employed to improve the

Description : Bundled conductors are employed to improve the.  A) Appearance of the transmission line B) Mechanical stability of the line C) Current carrying capacity of the line D) Corona performance of the line

Last Answer : B

A three phase 50 Hz line consists of three conductors each of diameter 21 mm,...

Description : A three phase 50 Hz line consists of three conductors each of diameter 21 mm, The spacing between the conductors all follows:A - B = 3m, B - C = 5m, C - A = 3.6mIf the line operates at 132 k V, the reactive voltampere generatd by the line per km is?

Last Answer : A three phase 50 Hz line consists of three conductors each of diameter 21 mm, The spacing between the conductors all follows:A - B = 3m, B - C = 5m, C - A = 3.6mIf the line operates at 132 k V, the reactive voltampere generated by the line per km is  51.70 kVAr.

"Expanded ACSR" are conductors composed of ?

Description :  "Expanded ACSR" are conductors composed of ?

Last Answer :  "Expanded ACSR" are conductors composed of a fillter between the inner steel and the outer aluminium strands to increase the overall diameter of the conductor.

A three phase over head transmission line has its conductors horizontally...

Description : A three phase overhead transmission line has its conductors horizontally spaced with spacing between adjacent conductors equal to 'd'. if now the conductors of the line are rearranged to form and the equilateral triangle of sides equal to 'd' then?

Last Answer : A three-phase overhead transmission line has its conductors horizontally spaced with spacing between adjacent conductors equal to 'd'. if now the conductors of the line are rearranged to form and an equilateral triangle of sides equal to 'd' then average capacitance and inductance will increase.

When bundle conductors are used in place of single conductors, ...

Description : When bundle conductors are used in place of single conductors, the effective inductance and capacitance will respectively

Last Answer : When bundle conductors are used in place of single conductors, the effective inductance and capacitance will respectively decrease and remain unaffected.

For equilateral spacing of conductors of an untrasposed 3-phase line, we have

Description : For equilateral spacing of conductors of an untrasposed 3-phase line, we have?

Last Answer : For equilateral spacing of conductors of an untrasposed 3-phase line, we have balanced receiving end voltage and communication interference.

For a single phase overhead line having solid copper conductors of ...

Description : For a single phase overhead line having solid copper conductors of diameter 1 cm, spaced 60 cm between centers, the inductance in mH/km is?

Last Answer : For a single phase overhead line having solid copper conductors of diameter 1 cm, spaced 60 cm between centers, the inductance in mH/km is 0.05 + 0.2 ln (6010.5).

Solid type cables are considered unreliable beyond 66 kV because (a) insulation may melt due to higher temperature (b) skin effect dominates on the conductor (c) of corona loss between conductor and sheath material (d) there is a danger of breakdown of insulation due to the presence of voids

Description : Solid type cables are considered unreliable beyond 66 kV because (a) insulation may melt due to higher temperature (b) skin effect dominates on the conductor (c) of corona loss between conductor and sheath material (d) there is a danger of breakdown of insulation due to the presence of voids

Last Answer : (d) there is a danger of breakdown of insulation due to the presence of voids

What is corona loss?

Last Answer : Corona is nothing but the ionization of surrounding air around the conductor which produces hissing noise,

Corona loss is less when the shape of conductor is:

Description : Corona loss is less when the shape of conductor is:

Last Answer : Circular

Corona loss is minimum in:

Description : Corona loss is minimum in: (1) Monopolar HVDC line (2) Bipolar HVDC line (3) Both in Monopolar& Bipolar HVDC lines (4) EHV AC lines

Last Answer : Corona loss is minimum in: Monopolar HVDC line

The corona loss of a 3-phase transmission line is 100 kW at 60 kV/phase and 25 kW at 50 kV/phase....

Description : The corona loss of a 3-phase transmission line is 100 kW at 60 kV/phase and 25 kW at 50 kV/phase. The disruptive critical voltage is (A) 40 kV (B) 43.6 kV (C) 49.6 kV (D) 50 kV

Last Answer : The corona loss of a 3-phase transmission line is 100 kW at 60 kV/phase and 25 kW at 50 kV/phase. The disruptive critical voltage is 40 kV

A loss less transmission line having Surge Impedance Loading (SIL) of 2280 MW is provided with a uniformly

Description : A loss less transmission line having Surge Impedance Loading (SIL) of 2280 MW is provided with a uniformly distributed series capacitive compensation of 30%. Then, SIL of the compensated transmission line will be (A) 1835 MW (B) 2280 MW (C) 2725 MW (D) 3257 MW

Last Answer : A loss less transmission line having Surge Impedance Loading (SIL) of 2280 MW is provided with a uniformly distributed series capacitive compensation of 30%. Then, SIL of the compensated transmission line will be 2280 MW

A loss less line terminated with its surge impedance has

Description : A loss less line terminated with its surge impedance has

Last Answer : A loss less line terminated with its surge impedance has flat voltage profile.

A 100 km long transmission line is loaded at 110 kV.if the loss of line is ...

Description : A 100 km long transmission line is loaded at 110 kV.if the loss of line is 5 MW and the load is 150 MVA, the resistance of the line is?

Last Answer : P = I^2  *  R 5*10^6  = [(150*10^6) / (110*10^3)  *  R R = 2.7 ohm/phase

Isoxsuprine increases limb blood flow in normal individuals, but is of limited efficacy in Buerger’s disease, because in this disease: A. Vasodilator β adrenoceptors are deficient B. There is loss of sympathetic innervation C. Blood flow to the affected limb is reduced by organic obstruction D. The drug is not delivered to the affected site

Description : Isoxsuprine increases limb blood flow in normal individuals, but is of limited efficacy in Buerger's disease, because in this disease: A. Vasodilator β adrenoceptors are deficient B. There is loss ... affected limb is reduced by organic obstruction D. The drug is not delivered to the affected site

Last Answer : C. Blood flow to the affected limb is reduced by organic obstruction

Isoxsuprine increases limb blood flow in normal individuals, but is of limited efficacy in Buerger’s disease, because in this disease: A. Vasodilator β adrenoceptors are deficient B. There is loss of sympathetic innervation C. Blood flow to the affected limb is reduced by organic obstruction D. The drug is not delivered to the affected site

Description : Isoxsuprine increases limb blood flow in normal individuals, but is of limited efficacy in Buerger's disease, because in this disease: A. Vasodilator β adrenoceptors are deficient B. There is loss ... affected limb is reduced by organic obstruction D. The drug is not delivered to the affected site

Last Answer : C. Blood flow to the affected limb is reduced by organic obstruction

The heating of conductors as a result of resistance in a distribution circuit causes a power loss expressed as _____________. A. line droop B. line loss C. IR drop D. hysteresis

Description : The heating of conductors as a result of resistance in a distribution circuit causes a power loss expressed as _____________. A. line droop B. line loss C. IR drop D. hysteresis

Last Answer : Answer: B

For conductors, the loss tangent will be a) Zero b) Unity c) Maximum d) Minimum

Description : For conductors, the loss tangent will be a) Zero b) Unity c) Maximum d) Minimum

Last Answer : c) Maximum

how fat are you and you will die in 23/04/2021 by corona because you have dibities?

Description : how fat are you and you will die in 23/04/2021 by corona because you have dibities?

Last Answer : youw david or shela or alex or morgan or lusy or hamid or isa or muhamed or mustafa or dany..... are you turcish

Can I pray obligatory prayers at home because of corona virus ? Although there is no excuse! ?

Description : Can I pray obligatory prayers at home because of corona virus ? Although there is no excuse! ?

Last Answer : Due to Corona virus, obligatory prayers can be read at home. However, this virus should be seen as an excuse. Because , it is a sin not to join the congregation of the mosque without any excuse. ... excuse or if he is a traveler then pray at home instead of going to the mosque. Have permission

Because of Corona ? Corona seems to be in the village now.

Description : Because of Corona ? Corona seems to be in the village now. The problem in the village is mobile internet. Grameenphone or banglalink net does not get bad but net price is much higher. It goes without ... . And can I increase the speed of the net a bit by using network booster or something else ?

Last Answer : GP is the best , although its offer price is high. However, its speed is better than Airtel. I don't use Airtel internet at all. So I will suggest - it is wise to use GP.

The presence of ozone due to corona is harmful because it (a) reduces power factor (b) corrodes the material (c) gives odour (d) transfer energy to the ground (e) none of the above

Description : The presence of ozone due to corona is harmful because it (a) reduces power factor (b) corrodes the material (c) gives odour (d) transfer energy to the ground (e) none of the above

Last Answer : (b) corrodes the material

When inspection doors on the walls of boilers are opened, flame does not leap out because

Description : When inspection doors on the walls of boilers are opened, flame does not leap out because  (1) These holes are small (2) Pressure inside is negative (3) Flame travels always in the direction of flow (4) These holes are located beyond the furnace

Last Answer : When inspection doors on the walls of boilers are opened, flame does not leap out because Pressure inside is negative 

Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above

Description : Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above

Last Answer : Ans:(b)

On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because – (1) metals have higher thermal capacity than plastics (2) plastics have a lower density than metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Description : On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because - (1) metals ... metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Last Answer : (3) metals are good conductors of heat Explanation: On a chilly day, the room temperature is lower than our body temperature. Since metals have a higher coefficient of thermal conductivity than plastic, they ... from our fingers will flow to the metal cap much more quickly than to the plastic body.

Metals are good conductors of electricity because - (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Description : Metals are good conductors of electricity because - (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Last Answer : (1) they contain free electrons Explanation: Copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points.

Metals are good conductors of electricity because – (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Description : Metals are good conductors of electricity because – (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Last Answer : (1) they contain free electrons Explanation: Copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points.

Metals are good conductors of electricity because they have: (a) Large number of bounded electrons (b) Small number of electrons (c) Large number of free electrons (d) Small number of free electrons

Description : Metals are good conductors of electricity because they have: (a) Large number of bounded electrons (b) Small number of electrons (c) Large number of free electrons (d) Small number of free electrons

Last Answer : (c) Large number of free electrons

Which of the following statement is correct: (a) Similar charges attract each other (b) Similar charges attract and repel each other (c) Similar charges repel each other (d) Similar charges neither attract nor repel 9. Metals are good conductors of electricity because they have:

Description : Which of the following statement is correct: (a) Similar charges attract each other (b) Similar charges attract and repel each other (c) Similar charges repel each other (d) Similar charges neither attract nor repel 9. Metals are good conductors of electricity because they have:

Last Answer : (c) Similar charges repel each other

Metal are good conductors, because (1) they contain free electrons (2) the molecules in them are very close to each other (3) the molecules in them collide very freely (4) they contain reflecting surface

Description : Metal are good conductors, because (1) they contain free electrons (2) the molecules in them are very close to each other (3) the molecules in them collide very freely (4) they contain reflecting surface

Last Answer : they contain free electrons

On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals have higher thermal capacity than plastics (2) plastics have a lower density than metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Description : On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals ... metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Last Answer : metals are good conductors of heat

Copper conductors are generally used for transmission lines because it _________.

Last Answer : Copper conductors are generally used for transmission lines because it has longer life and high conductivity.

The following is true of fenfluramine except: A. It lacks CNS stimulant action B. Its use has been associated with cardiac abnormalities and pulmonary hypertension C. It causes weight loss independent of reduced food intake D. It enhances serotonergic transmission in the brain

Description : The following is true of fenfluramine except: A. It lacks CNS stimulant action B. Its use has been associated with cardiac abnormalities and pulmonary hypertension C. It causes weight loss independent of reduced food intake D. It enhances serotonergic transmission in the brain

Last Answer : C. It causes weight loss independent of reduced food intake

Which of the following would be the result of a spinal lesion at the level of C8? A. a reduced brachioradialis reflex B. inability to abduct the shoulder C. loss of sensation over the lateral aspect of the arm D. winging of the scapula E. weakness of finger flexion

Description : Which of the following would be the result of a spinal lesion at the level of C8? A. a reduced brachioradialis reflex B. inability to abduct the shoulder C. loss of sensation over the lateral aspect of the arm D. winging of the scapula E. weakness of finger flexion

Last Answer : Ans: E

How can loss be reduced during construction (or fabrication) of optical fibers?

Description : How can loss be reduced during construction (or fabrication) of optical fibers?

Last Answer : By removing the impurities from optical fiber.

When light strikes a flat polished end of a fiber, the fiber loss produced can be reduced by ∙ a. Splicing ∙ b. Antireflection coating ∙ c. Insulation jacket ∙ d. All of these

Description : When light strikes a flat polished end of a fiber, the fiber loss produced can be reduced by ∙ a. Splicing ∙ b. Antireflection coating ∙ c. Insulation jacket ∙ d. All of these

Last Answer : ∙ b. Antireflection coating

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Description : What is NOT related to the normal aging process? A. Progressive bone loss B. Reduced elasticity of muscles C. Decreased elasticity of the skin D. Lower pain threshold

Last Answer : D. Lower pain threshold

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Last Answer : M. Cylinder peripheral speed

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Description : Health benefits afforded by the combined estrogenprogestin oral contraceptive pill include the following except: A. Reduced menstrual blood loss B. Lower risk of fibrocystic breast disease C. Lower risk of myocardial infarction D. Lower risk of endometrial carcinoma

Last Answer : . Lower risk of myocardial infarction