ENGINEERING ECONOMICS QUIZ

220 kV transmission line voltage is economical for a distance of

200 km

400 km

100 km

22 km

TRUE ANSWER : ?
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If the height of transmission tower is increased, which of the following parameters is likely to change?

Inductance

Capacitance

All of the listed here

Resistance

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A line which connects a consumer to the distributor is called

Distributor

Feeder

Service mains

None of the listed here

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The line voltage on the L. T. Side of a distribution transformer is

11 kV

230 V

400 V

800 V

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The cause of damage to the lead sheath of a cable is

crystallisation of the lead through vibration

chemical action on the lead when buried in the earth

all of these

mechanical damage

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Power system stability is least affected by

Reactance of generator

Reactance of transmission line

Losses

Input torque

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When the load at the receiving end of a long transmission line is removed, the sending end voltage. This effect is known as

Proximity effect

Kelvin effect

Skin effect

Ferranti effect

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

CB

All of the listed here

Fuse

G. O. Switch

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Transmission line insulators are made of

porcelain

P.V.C.

iron

glass

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The term service mains refers to

Primary distribution

Secondary transmission

Secondary distribution

Primary transmission

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