GATE EE 1999 | GATE EE Year Wise Previous Years Questions

GATE EE 1999

MCQ (Single Correct Answer)

-0.3

An overhead line having a surge impedance of $$400$$$$\Omega $$ is connected in series with an underground cable having a surge impedance of $$100$$$$\Omega $$. If a surge of $$50$$ $$kV$$ travels from the line end towards the cable junctions, the value of the transmitted voltage wave at the junction is

$$30$$ kV

$$20$$ kV

$$80$$ kV

$$-30$$ kV

GATE EE 1999

MCQ (Single Correct Answer)

-0.3

Corona losses are minimized when

Conductor size is reduced.

Smooth conductor is reduced.

Sharp points are provided in the line hardware.

Current density in conductors is reduced.

GATE EE 1999

MCQ (Single Correct Answer)

-0.3

The load carrying capability of a long AC transmission line is

Always limited by the conductor size

Limited by stability considerations.

Reduced at a low ambient temperatures.

Decreased by the use of bundled conductors of single conductors.

GATE EE 1999

MCQ (Single Correct Answer)

-0.6

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

$$0.05+0.2$$ $$ln$$ $$60$$

$$0.2$$ $$ln$$ $$60$$

$$0.05+0.2$$ $$ln$$ $$(60/0.5)$$

$$0.2$$ $$ln$$ $$(60/0.5)$$

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