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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 V and δ
 P and V
 P and Q
 δ and Q

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Power Systems
Earthing switch is used for

All of these
 discharging residual energies
 protection of equipment from ground faults
 measuring of safety voltage

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Power Systems
Surge tank is kept very close to the

 generator
 turbine
 spill way
 pen stock

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Power Systems
When a nuclear reaction is operating at constant power the multiplication factor is

  1.
 greater than 1.
 less than 1.
 may be any of the above.

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Power Systems
One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is

 120 MWhr
 135.3 MWhr
 140 MWhr
 130.2 MWhr

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Power Systems
A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?

 28.28 kV
 30.28 kV
 31.28 kV
 29.28 kV

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