Which of the following are the constants of the transmission lines ? (a) Resistance (b) Inductance (c) Capacitance (d) All of the above

Which of the following are the constants of the transmission lines ? (a) Resistance (b) Inductance (c) Capacitance (d) All of the above
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(d) All of the above
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Which of the following are the constants of the transmission lines ? (a) Resistance (b) Inductance (c) Capacitance (d) All of the above

Description : Which of the following are the constants of the transmission lines ? (a) Resistance (b) Inductance (c) Capacitance (d) All of the above

Last Answer : (d) All of the above

A transmission line is said to have distributed constants of inductance, capacitance, and resistance along the line. What units of measurement are used to express these constants?

Description : A transmission line is said to have distributed constants of inductance, capacitance, and resistance along the line. What units of measurement are used to express these constants?

Last Answer : Inductance is expressed in micro henrys per unit length, capacitance is expressed in picofarads per unit length, and resistance is expressed in ohms per unit length.

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

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

Last Answer : (d) steel

High voltage transmission lines use (a) suspension insulators (b) pin insulators (c) both (a) and (b) (d) none of the above

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Most of the high voltage transmission lines in India are (a) underground (b) overhead (c) either of the above (d) none of the above

Description : Most of the high voltage transmission lines in India are (a) underground (b) overhead (c) either of the above (d) none of the above

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Which of the following is the demerit of a 'constant voltage transmission system' ? (a) Increase of short-circuit current of the system (b) Availability of steady voltage at all loads at the line terminals (c) Possibility of better protection for the line due to possible use of higher terminal reactants (d) Improvement of power factor at times of moderate and heavy loads (e) Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission

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Last Answer : (a) Increase of short-circuit current of the system

Which of the following materials is not used for transmission and distribution of electrical power ? (a) Copper (b) Aluminium (c) Steel (d) Tungsten

Description : Which of the following materials is not used for transmission and distribution of electrical power ? (a) Copper (b) Aluminium (c) Steel (d) Tungsten

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

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

Distribution lines in India generally use (a) wooden poles (b) R.C.C. poles (c) steel towers (d) none of the above

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What is the effect of resistance , inductance and capacitance in transmission line ?

Description : What is the effect of resistance , inductance and capacitance in transmission line ?

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The minimum clearance between the ground and a 220 kV line is about (a) 4.3 m (b) 5.5 m (c) 7.0 m (d) 10.5 m

Description : The minimum clearance between the ground and a 220 kV line is about (a) 4.3 m (b) 5.5 m (c) 7.0 m (d) 10.5 m

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The material commonly used for sheaths of underground cables is (a) lead (b) rubber (c) copper (d) iron

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Last Answer : (a) lead

The material generally used for armour of high voltage cables is (a) aluminium (b) steel (c) brass (d) copper

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The material commonly used for insulation in high voltage cables is (a) lead (b) paper (c) rubber (d) none of the above

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

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The distributors for residential areas are (a) single phase (b) three-phase three wire (c) three-phase four wire (d) none of the above

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The voltage of the single phase supply to residential consumers is (a) 110 V (b) 210 V (c) 230 V (d) 400 V

Description : The voltage of the single phase supply to residential consumers is (a) 110 V (b) 210 V (c) 230 V (d) 400 V

Last Answer : (c) 230 V

Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ? (a) Circulating current method (b) Thevenin's theorem (c) Superposition of currents (d) Direct application of Kirehhoffs laws (e) All of the above

Description : Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ? (a) Circulating current method (b) Thevenin's theorem (c) Superposition of currents (d) Direct application of Kirehhoffs laws (e) All of the above

Last Answer : (e) All of the above

A booster is a (a) series wound generator (b) shunt wound generator (c) synchronous generator (d) none of the above

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Which of the following D.C. distribution system is the simplest and lowest in first cost ? (a) Radial system (b) Ring system (c) Inter-connected system (d) None of the above

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Last Answer : (a) Radial system

Due to which of the following reasons the cables should not be operated too hot ? (a) The oil may loose its viscosity and it may start drawing off from higher levels (b) Expansion of the oil may cause the sheath to burst (c) Unequal expansion may create voids in the insulation which will lead to ionization (d) The thermal instability may rise due to the rapid increase of dielectric losses with temperature (e) All of the above

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Last Answer : (e) All of the above

Which of the following methods is used for laying of underground cables ? (a) Direct laying (b) Draw-in-system (c) Solid system (d) All of the above

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The operating voltage of extra high tension cables is upto (a) 6.6 kV (b) 11 kV (c) 33 kV (d) 66 kV (e) 132 kV

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Last Answer : (d) 66 kV

The operating voltage of supertension cables is up to (a) 3.3 kV (b) 6.6 kV (c) 11 kV (d) 33 kV

Description : The operating voltage of supertension cables is up to (a) 3.3 kV (b) 6.6 kV (c) 11 kV (d) 33 kV

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The operating voltage of high voltage cables is up to (a)l.lkV (b)3.3kV (c)6.6kV (d)llkV

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Last Answer : (d)llkV

The square root of the ratio of line impedance and shunt admittance is called the (a) surge impedance of the line (b) conductance of the line (c) regulation of the line (d) none of the above

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The phenomenon qf rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the (a) Seeback effect (b) Ferranti effect (c) Raman effect (d) none of the above

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310 km line is considered as (a) a long line (b) a medium line (c) a short line (d) any of the above

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The corona is considerably affected by which of the following ? (a) Size of the conductor (b) Shape of the conductor (c) Surface condition of the conductor (d) All of the above

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The usual spans with R.C.C. poles are (a) 40—50 meters (b) 60—100 meters (c) 80—100 meters (d) 300—500 meters

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Galvanised steel wire is generally used as (a) stay wire (b) earth wire (c) structural components (d) all of the above

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Last Answer : (d) all of the above

The wooden poles well impregnated with creosite oil or any preservative compound have life (a) from 2 to 5 years (b) 10 to 15 years (c) 25 to 30 years (d) 60 to 70 years

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If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as (a) Kelvin's law (b) Ohm's law (c) Kirchhoffs law (d) Faraday's law (e) none of the above

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Overhead system can be designed for operation up to (a) 11 kV (b) 33 kV (c) 66 kV (d) 400 kV

Description : Overhead system can be designed for operation up to (a) 11 kV (b) 33 kV (c) 66 kV (d) 400 kV

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The underground system cannot be operated above (a) 440 V (b) 11 kV (c) 33 kV (d) 66 kV

Description : The underground system cannot be operated above (a) 440 V (b) 11 kV (c) 33 kV (d) 66 kV

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are the conductors, which connect the consumer's terminals to the distribution (a) Distributors (b) Service mains (c) Feeders (d) None of the above

Description : are the conductors, which connect the consumer's terminals to the distribution (a) Distributors (b) Service mains (c) Feeders (d) None of the above

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By which of the following systems electric power may be transmitted ? (a) Overhead system (b) Underground system (c) Both (a) and (b) (d) None of the above

Description : By which of the following systems electric power may be transmitted ? (a) Overhead system (b) Underground system (c) Both (a) and (b) (d) None of the above

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What is the propagation velocity of a signal in a transmission line whose inductance and capacitance are 5μH/m and 20μF/m respectively? A. 100x103 m/s B. 100 m/s C. 10x103 m/s D. 100x106 m/s

Description : What is the propagation velocity of a signal in a transmission line whose inductance and capacitance are 5μH/m and 20μF/m respectively? A. 100x103 m/s B. 100 m/s C. 10x103 m/s D. 100x106 m/s

Last Answer : A. 100x103 m/s

Which of the following determines the characteristics of a transmission line? A. Inductance B. Capacitance C. Physical dimension D. Length

Description : Which of the following determines the characteristics of a transmission line? A. Inductance B. Capacitance C. Physical dimension D. Length

Last Answer : C. Physical dimension

Referred to the dielectric constant of a transmission line material. A. Inductance and capacitance B. Velocity factor C. Characteristic impedance D. Propagation velocity

Description : Referred to the dielectric constant of a transmission line material. A. Inductance and capacitance B. Velocity factor C. Characteristic impedance D. Propagation velocity

Last Answer : B. Velocity factor

. What are two of the three physical factors that determine the values of capacitance and inductance of a transmission line?

Description : . What are two of the three physical factors that determine the values of capacitance and inductance of a transmission line?

Last Answer : (1) Type of line used, (2) dielectric in the line, and (3) length of line.

effect of inductance and capacitance on performance of transmission line.

Description : effect of inductance and capacitance on performance of transmission line.

Last Answer : Following are the effect on performance of transmission line:  1. Due to inductance (L) voltage drop in transmission line produces.  2. Capacitor (C) draws charging current ... , transmission line efficiency, voltage regulation & also power factor of transmission line gets affected. 

A 800 kV transmission line is having per phase line inductance of 1.1 mH/km and per phase line capacitance

Description : A 800 kV transmission line is having per phase line inductance of 1.1 mH/km and per phase line capacitance of 11.68 nF/km. Ignoring the length of the line, its ideal power transfer capability in MW is (A) 1204 MW (B) 1504 MW (C) 2085 MW (D) 2606 MW

Last Answer : A 800 kV transmission line is having per phase line inductance of 1.1 mH/km and per phase line capacitance of 11.68 nF/km. Ignoring the length of the line, its ideal power transfer capability in MW is 2085 MW

'Farad' is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Description : 'Farad' is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Last Answer : (1) Capacitance Explanation: The Farad is the SI derived unit of capacitance. It is named after the English physicist Michael Faraday.

The fuse in our domestic electric circuit melts when there is a high rise in – (1) Inductance (2) Current (3) Resistance (4) Capacitance

Description : The fuse in our domestic electric circuit melts when there is a high rise in – (1) Inductance (2) Current (3) Resistance (4) Capacitance

Last Answer : (2) Current Explanation: In electronics and electrical engineering, a fuse is a type of low resistance resistor that acts as a sacrificial device to provide over protection, of either the load ... fuse interrupts excessive current (blows) so that further damage by overheating or fire is prevented.

The formula for computing impedance in a series circuit containing resistance, capacitance, and inductance is _____________. [ NOTE: the symbol * stands for 'multiplied by' ] A. Z = RT + XL + XC B. Z = R + XL - XC C. Z * Z = R * R + (XL - XC) * (XL - XC) D. Z = R * R + (XL * XC) - (XL * XC)

Description : The formula for computing impedance in a series circuit containing resistance, capacitance, and inductance is _____________. [ NOTE: the symbol * stands for 'multiplied by' ] A. Z = RT + XL + XC B. Z = R + XL - XC C. Z * Z = R * R + (XL - XC) * (XL - XC) D. Z = R * R + (XL * XC) - (XL * XC)

Last Answer : Answer: C

Capacitance is the property of an electric circuit opposing a change in the _____________. A. current in the circuit B. voltage in the circuit C. inductance in the circuit D. resistance in the circuit

Description : Capacitance is the property of an electric circuit opposing a change in the _____________. A. current in the circuit B. voltage in the circuit C. inductance in the circuit D. resistance in the circuit

Last Answer : Answer: B

AC circuits develop resistance, inductance, and capacitance. The inductive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Description : AC circuits develop resistance, inductance, and capacitance. The inductive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: A

Alternating current circuits develop resistance, inductance, and capacitance. The capacitance of individual capacitors is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Description : Alternating current circuits develop resistance, inductance, and capacitance. The capacitance of individual capacitors is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: D

Alternating current circuits develop resistance, inductance and capacitance. The inductance of a coil is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Description : Alternating current circuits develop resistance, inductance and capacitance. The inductance of a coil is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: C