1 Answer

Answer :

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

Related questions

Description : Overhead lines generally use (a) copper conductors (b) all aluminium conductors (c) A.C.S.R. conductors (d) none of these

Last Answer : (c) A.C.S.R. conductors

Description : Bundled conductors are mainly used in high voltage overhead transmission lines to (a) Reduce line loss (c) Reduce corona (b) Reduce harmonics (d) Increase strength

Last Answer : Bundled conductors are mainly used in high voltage overhead transmission lines to Reduce corona 

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.

Description : ACSR (Aluminium Conductor Steel Reinforced) are used as (A) over head transmission lines. (B) super conductors. (C) fuse (D) underground cables.

Last Answer : (A) over head transmission lines.

Description : 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

Description : Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron

Last Answer : (3) copper is a better conductor of electricity than iron Explanation: Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and low resistivity.

Description : Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron 

Last Answer : copper is a better conductor of electricity than iron

Description : Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal

Last Answer : C. ground

Description : In transmission lines the crossarms are made of (a) copper (b) wood (c) R.C.C. (d) steel

Last Answer : (d) steel

Description : Which of the following materials is used for overhead transmission lines ? (a) Steel cored aluminium (b) Galvanised steel (c) Cadmium copper (d) Any of the above

Last Answer : (d) Any of the above

Description : In transmission lines the cross-arms are made of (a) copper (b) wood (c) R.C.C. (d) steel

Last Answer : (d) steel

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

Last Answer : Because copper conductor are costlier than aluminium conductor

Description : Bulk power transmission over long HVDC lines is preferred because of

Last Answer : Bulk power transmission over long HVDC lines is preferred because of Low cost of HVDC terminal

Description : If the operating frequency is 450 MHz what length of a pair of conductors is considered to be a transmission line? A. 2.19 ft B. 2.19 m C. 0.219 ft D. 0.219 m

Last Answer : C. 0.219 ft

Description : A pair of current-carrying conductors is not considered a transmission line unless it is at least ___ λ long at the signal frequency. A. 0.1 B. 0.3 C. 0.2 D. 0.4

Last Answer : A. 0.1

Description : A transmission line consisting of two conductors that have equal resistance per unit length. A. Unbalanced line B. Open-wire line C. Balanced line D. Coaxial line

Last Answer : C. Balanced line

Description : The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is (a) proportional to 7 (b) proportional to X (c) proportional to distance between the conductors (d) inversely proportional to I

Last Answer : (b) proportional to X

Description : 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

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.

Description : The ……… consists of two conductors, where one is the inner conductor of solid copper -Technology

Last Answer : (c) Co-axial cable consists of two conductors which are parallel to each other, i.e. inner and outer conductor.

Description : How many valence electrons do conductors such as copper have?

Last Answer : Good conductors have one to three valence electrons. Copperitself has one valence electron.

Description : To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor - (1) should be made of a good conductor but can be of any shape (2) should be in the form ... can be of any shape (4) should be made of a good conductor like copper with sharp-pointed edges

Last Answer : (4) should be made of a good conductor like copper with sharppointed edges Explanation: A lightning conductor is made up of a sharp pointed metal (usually copper metal, as it is a very good ... cloud, it will first strike the pointed tip of the lightning conductor and quickly travel to the earth.

Description : The metal used to make lightning conductors is – (1) Iron (2) Aluminum (3) Copper (4) Zinc

Last Answer : (3) Copper Explanation: A lightning rod is a metal rod or metallic object mounted on top of a building, electrically bonded using a wire or electrical conductor to interface with ground or "earth" ... wire, instead of passing through the building, where it could start a fire or cause electrocution.

Description : The best conductors of heat are A) Silver and Copper B) Lead and Mercury C) Iron and Tin D) Gold and Platinum

Last Answer : A) Silver and Copper

Description : Define the metal solvent action that takes place when copper conductors are soldered together.

Last Answer : The solder dissolves a small amount of the copper, which combines with the solder forming a new alloy; therefore, the joint is one common metal.

Description : A single fiber can handle as many voice channels as ∙ A. a pair of copper conductors ∙ B. a 1500-pair cable ∙ C. a 500-pair cable ∙ D. a 1000-pair cable

Last Answer : B. a 1500-pair cable

Description : Asingle fiber can handle asmanyvoice channel as a. a pair of copper conductors b. a1500-pair cable c. a 500-pair cable d. a 1000-pair cable

Last Answer : b. a1500-pair cable

Description : To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor (1) should be made of a good conductor but can be of any shape (2) should be in the form of ... can be of any shape (4) should be made of a good conductor like copper with sharp-pointed edges

Last Answer : should be made of a good conductor like copper with sharp-pointed edges

Description : The metal used to make lightning conductors is (1) Iron (2) Aluminium (3) Copper (4) Zinc

Last Answer : Copper

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).

Description : Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be?

Last Answer : Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be 10 ohms.

Description : Different components of the motherboard of a PC unit are linked together by sets of parallel electrical conducting lines. What are these lines called? A) Conductors B) Buses C) Connectors D) Consecutives

Last Answer : Answer : B

Description : Different components on the motherboard of a PC processor unit are linked together by sets or parallel electrical conducting lines. What are these lines called? a. Conductors b. Buses c. Connectors d. Connectively

Last Answer : Buses

Description : What happens to the H lines between the conductors of a coil when the conductors are close together?

Last Answer : The H lines cancel.

Description : Different components on the motherboard of a PC processor unit are linked together by sets or parallel electrical conducting lines. What are these lines called? a. Conductors b. Buses c. Connectors d. Connectively

Last Answer : b. Buses

Description : Generally Non-metals are not conductors of electricity. Which of the given is a good conductor of electricity? a) Diamond b) Graphite c) Sulphur d) Fullerene

Last Answer : b) Graphite

Description : Multicore cables generally use (a) square conductors (b) circular conductors (c) rectangular conductors (d) sector-shaped conductors (e) none of the above

Last Answer : (d) sector-shaped conductors

Description : Current ratings of MCB for Air conditioners is generally used as _________. A. 10/15 Amp B. 5/10 A C. 20/25 Amp D. none of these 

Last Answer : Current ratings of MCB for Air conditioners is generally used as 10/15 Amp. 

Description : Computers cannot communicate with each other directly over telephone lines because they usedigitalpulses whereas telephone lines useanalog sound frequencies. What is the name of the device which permits digital to analog ... A. Interface B. Modem C. Attenuation D. Teleprocessor E. None of the above

Last Answer : Modem

Description : Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.

Last Answer : Parts Insulating Materials  Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils.  ... Transformer bushings Porcelain  Insulation between transmission line and pole. Porcelain

Description : What happens insulators when high voltage passes through transmission lines whether it breaks or lose it's insulating property?

Last Answer : I think it will breaks when it crosses breakdown voltage .

Description : Why are overhead transmission lines not insulated?

Last Answer : Insulators are useful to help separate electrical conductors when they come into physical contact. Overhead Transmission Lines Are Not Insulated: The overhead transmission line is carrying extreme high voltage and ... a whole lot of thick insulation to absorb the heat produced by such high voltage.

Description : What type of earthing is used by transmission lines?

Last Answer : Preventive  multiple  earthing  PME.

Description : The main limitation for power handling capability of short length transmission lines and cables is (A) power factor (B) stability (C) thermal effect limit (D) conductor size

Last Answer : The main limitation for power handling capability of short length transmission lines and cables is thermal effect limit

Description : Transmission lines are transposed to : (A) Reduce copper loss (B) Reduce skin effect (C) Prevent interference with neighbouring telephone lines (D) Prevent short-circuit between any two lines

Last Answer : a

Description :  Transmission lines connect: -  a) Generating station to a switching station / step down transformer station b) Step down transformer station to service transformer banks c) Distribution transformer to consumer premises d) Service points to consumer premises

Last Answer :  Transmission lines connect: - Generating station to a switching station / step down transformer station 

Last Answer : The transmission lines which feed different sub-stations represent primary distribution.

Last Answer : On the basis of distance from generating station to distributers

Last Answer : Transmission lines use high voltage to reduce the amount of power loss over long distance. This power loss can come from large current running through the cable due to the resistance of the cable conductor. Stepping up the voltage reduces the amount of current through transmission lines.

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)