POWER SYSTEMS QUIZ

Fault calculations using computer are usually done by

Z bus method

Y bus method

None of these

either 1 or 2

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A moderator material should have

small atomic mass.

large atomic mass.

may be any of the above.

None of these

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

1600 MW

400 MW

800 MW

200 MW

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The total number of strands(N) is concentrically stranded cable with total annular space filled with strands of uniform diameter is given by (if x is number of layers)

N = 3x²-2x+1

N = 3x²-3x+1

N = 3x²+3x+1

N = 3x²-6x+1

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The generating station suitable to operate as peak load plant is

Pumped storage.

Power station.

Thermal power station.

Nuclear power station.

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The area under a flow duration curve represents

total power available.

total of units of energy available.

maximum rate of run-off during the period.

total quantity of run-off during that period.

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On which one of the following cycles does a modern steam power plat work

Otto cycle.

Rankine cycle.

Bell - Coleman cycle.

Carnot cycle.

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Pin insulators are used up to

33 kV

any voltage level

120 kV

11 kV

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What will be the thermal efficiency of a 240 V, 1000 W electric kettle if it brings 2 liters of water at 15° C to boiling point 15 Minutes

80.25 %.

79.33 %.

78.96 %.

74.56 %.

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In relay coil which is used?

Power transformer.

Current transformer.

Instrument transformer.

Potential transformer.

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