POWER SYSTEMS QUIZ

Electrostatic precipitators in thermal power plants are used for

control flow rate

All of these

removal of ash from flue gas

remove moisture from the cole

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Asynchronous tie line is a

DC transmission line

AC transmission line

either 1 or 2

None of these

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Water hamming process in pen-stocks results in

noise increases, pressure increases, velocity decreases.

noise increases.

pressure increases.

None of these

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In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is

1000 Ω

25 Ω

500 Ω

250 Ω

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Generation of of one watt needs about ______________ fission per second

3.1 × 107.

3.1 × 106.

3.1 × 1010.

3.1.

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A loss less transmission line has a length of 600 km, find the phase shift of voltage signal?

45°

42°

36°

90°

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In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)?

3.5 Ãƒâ€” 106 kV / sec.

2 Ãƒâ€” 106 kV / sec.

3 Ãƒâ€” 106 kV / sec.

1 Ãƒâ€” 106 kV / sec.

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For transmission line which one of the following relation is true?

AD + BC = 0

AD - BC = 1

AD - BC = 0

AD - BC = -1

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The commercial sources of energy are

none of above.

fossile fuels and radioactive substances.

solar, wind, biomass.

wood, animal wastes and agricultural wastes.

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A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage?

45 kV

40 kV

36 kV

32 kV

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