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Power Systems

Power Systems
Based on the discharge, Kaplan turbine will discharge

 >10000 lpm
 1000 lpm

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Power Systems
Positive, negative and zero sequence impedances of line are 2,2 and 5 pu respectively. Find self and mutual impedances respectively?

 2 and 2 pu
 1 and 3 pu
 3 and 1 pu
 2 and 5 pu

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Power Systems
The per unit impedance Z(pu) is given by

 ZΩ* (MVA)b/((KV)²b *100)
 ZΩ* (kVA)b/(KV)²b
 ZΩ* (MVA)b*100/(KV)²b
 ZΩ* (MVA)b/(KV)²b

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Power Systems
The specific speeds of Kaplan, Francis and Pelton turbines are in

 neither increasing nor decreasing order.
  the decreasing order.
 the increasing order.
None of these

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

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

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Power Systems
The surge impedance of a 400 km long overhead transmission line is 420 Ω. For a 200 km length of the same line, the surge impedance will be

 420 Ω
 210 Ω
 840 Ω
 400 Ω

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