Easy Transmission Lines Questions – Electrical Engineering (Page 3)

#41📜 EE Pre-Board August 2018📘 PowerhouseEasy

If the effect of earth is taken into account, then the capacitance of line to ground

Adecreases

Bincreases

Cremains unchanged

Dbecomes infinite

#42📜 EE Pre-Board August 2018📘 PowerhouseEasy

The effective resistance of conductor is increased by

Askin effect

Bproximity effect

Ccorona effect

Dboth skin effect and proximity effect

#43📜 EE Pre-Board August 2018📘 PowerhouseEasy

The surge impedance of a transmission line is given by

A\(\sqrt{C/L}\)

B\(\sqrt{LC}\)

C\(1/\sqrt{LC}\)

D\(\sqrt{L/C}\)

#44📜 EE Pre-Board August 2018📘 PowerhouseEasy

A two terminal pair of network of a transmission line can be represented by a

Aπ-network

BT-network

Ceither π or T

Dtree network

#45📜 EE Pre-Board August 2018📘 PowerhouseEasy

An ACSR conductor has (n-1) layers around its single center strand, the total number of strands will be

A\(3n^2 + 3n + 1\)

B\(3n^2 - 3n - 1\)

C\(3n^2 + 3n - 1\)

D\(3n^2 - 3n + 1\)

#46📜 EE Pre-Board August 2018📘 PowerhouseEasy

The effect of corona is

Aincreased reactance

Bincreased inductance

CIncreased energy loss

Dall of these

#47📘 EE Pocket Reviewer RojasEasy

During “load shedding” what will happen?

AFeeder loads are recomputed and distributed properly to the three lines

BLoad power factor is corrected using capacitors

CSome loads are being switched off

DSome loads are transferred to another feeder

#48📘 EE Pocket Reviewer RojasEasy

Which of the following is not the voltage at which power is usually transmitted?

A20 kV

B33 kV

C66 kV

D132 kV

#49📘 EE Pocket Reviewer RojasEasy

Bus bars are rated according to which of the following parameters?

ACurrent only

BCurrent and voltage

CCurrent, voltage and frequency

DCurrent, voltage, frequency and short time current

#50📘 EE Pocket Reviewer RojasEasy

Which statement below is correct about the line loss of a transmission line for a given power?

AIt is inversely proportional to supply voltage and power factor

BIt is directly proportional to supply voltage and inversely proportional to power factor

CIt is inversely proportional to supply voltage and directly proportional to power factor

DIt is directly proportional to supply voltage and power factor

#51📘 EE Pocket Reviewer RojasEasy

What type of conductors are used in overhead transmission lines?

ASolid

BStranded

CHollow

DEither solid or stranded

#52📘 EE Pocket Reviewer RojasEasy

Skin effect is noticeable only at what frequency?

ALow frequency

BHigh frequency

CResonant frequency

DBelow resonant frequency

#53📘 EE Pocket Reviewer RojasEasy

What type of steel is used in a steel cored conductors?

AHigh speed steel

BStainless steel

CLow carbon steel

DMild steel

#54📘 EE Pocket Reviewer RojasEasy

Which of the following parameters is neglected in a short transmission line?

ACapacitance

BInductance

CResistance

DNone of these

#55📘 EE Pocket Reviewer RojasEasy

Skin effect exists only on which of the following?

AHigh voltage DC overhead transmission

BLow voltage DC overhead transmission

CCables carrying dc current

DAC transmission

#56📘 EE Pocket Reviewer RojasEasy

Which type of poles are used to carry transformers?

AI-type

BH-type

CY-type

DA-type

#57📘 EE Pocket Reviewer RojasEasy

Which of the following are the stages in providing electrical energy to a consumer?

AGeneration, distribution and dissipation

BGeneration, distribution and transmission

CGeneration, transmission and distribution

DTransmission, generation and distribution

#58📘 EE Pocket Reviewer RojasEasy

What is the purpose of a booster in transmission lines?

ATo increase the current

BTo reduce current

CTo reduce the voltage drop

DTo compensate for voltage drop

#59📘 EE Pocket Reviewer RojasEasy

In a power system, the feeder is feeding power to which one?

ADistributors

BSub-stations

CGenerating stations

DTransmission lines

#60📘 EE Pocket Reviewer RojasEasy

Due to which of the following reasons aluminum is being favored as busbar material?

ALow density

BLow cost

CEasier to fabricate

DAll of these

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