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Power Systems

Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 500 MJ
 10 MJ
 5 MJ
 50 MJ

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Power Systems
When a pumped storage power plant is operated in conjunction with a steam power plant

 the operating cost of the steam plant become optimum
All of these
 load factor of the steam plant is increased
 chances of the tripping of the system decrease

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Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is

 Francis
 Pelton
 Kaplan
 Impeller

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Power Systems
Critical disruptive voltage is a voltage at which

 both 1 and 2
 corona is just initiated
 corona is visible with blue or violet colour
 nether 1 nor 2

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Power Systems
If the diameter of the conductor is increased

 the inductance is decreased
 no change in inductance and resistance
 the inductance is increased
 the resistance is increased

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Power Systems
Find the number of insulator discs required in string insulator, if operating voltage is 220 kV and maximum voltage of each disc is 11 kV?

 13
 20
 21
 10

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