TRANSMISSION & DISTRIBUTION QUIZ

The operating voltage of super-tension cables is up to

11 kV

6.6 kV

3.3 kV

33 kV

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the source of heat generation in the cables?

Dielectric losses in cable insulation

losses in the conductor

All of these

Losses in the metallic sheathings and armourings

TRUE ANSWER : ?
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The distribution transformer is rated in

kW

KVA

None of the listed here

kVAR

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YOUR ANSWER : ?

Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system?

Superposition of currents

Circulating current method

Thevenin's theorem

All of these

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The power transmitted will be maximum when

Receiving end voltage is more

Reactance is high

Sending end voltage is more

Corona losses are minimum

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In the event of the fault, line can be opened quickly by

All of the listed here

Fuse

G. O. Switch

CB

TRUE ANSWER : ?
YOUR ANSWER : ?

Transmission line insulators are made of

P.V.C.

iron

glass

porcelain

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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

Kirchhoff's law

Kelvin's law

Ohm's law

Faraday's law

TRUE ANSWER : ?
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The steel used in steel cored conductors is usually

Mild steel

Stainless steel

High speed steel

Alloy steel

TRUE ANSWER : ?
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The cause of damage to the lead sheath of a cable is

chemical action on the lead when buried in the earth

crystallisation of the lead through vibration

mechanical damage

all of these

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