POWER SYSTEMS QUIZ

Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is

200 MW

1600 MW

800 MW

400 MW

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The modern trend in electric power generation

to have large size thermal plants near load centre.

none of above.

to have large number of small size thermal plants located at different places.

to have large size thermal plant located near coal fields.

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An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 500/5. The plug setting multiplier for a fault current of 5 kA is

5

6

8

2

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A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠90° Ω, C = 0.5*10-6∠90° â„§. Find the no load receiving end voltage?

400 kV

320 kv

500 kV

600 kV

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Tarapur nuclear power plant has which type of reactor?

CANDU type reactors.

Boiling water type.

Pressurized water reactors.

None of these.

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A thermal protection relay provides protection against what?

any of the above

Over load

Short circuit

Temperature

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Inductance of transmission line will decrease when

both GMD and GMR increase

GMD increase and GMR decrease

both GMD and GMR decrease

GMD decrease and GMR increase

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In transmission lines distribution constants are

resistance

inductance and capacitance

inductance and resistance

both 1 and 2

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A power generating station has a maximum demand of 1000 MW. The annual load factor is 75% and plant capacity factor is 60%. Calculate the reserve capacity?

1250 MW

250 MW

500 MW

750 MW

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Communications lines are treated as

long transmission lines

any of the above

short transmission lines

medium transmission lines

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