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Power Systems

Power Systems
Operating time of pumped storage plant is

 low
 can't say
 high
 very high

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Power Systems
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 Charging current under no load?

 0.144∠90° A/phase
 1.144∠90° A/phase
 0.344∠90° A/phase
 0.512∠90° A/phase

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Power Systems
High capacity generators and motors are of

 star connected network
 delta connected network
 star connected with grounding network
 any of the above

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Power Systems
In thermal power stations, economiser will

 increase the thermal efficiency
 both 2 and 3
 reduce the thermal efficiency
 reduce the heat

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Power Systems
The annual depreciation of hydro power plant is about

 20 - 25 %.
 10 - 15 %.
  0.5 - 1.5 %.
 15 - 20 %.

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Power Systems
Units of incremental cost is

 Rs/MWhr
 RsMW/hr
 MWhr/Rs
 Rs/hr

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