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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 Q
 P and V
 δ and Q

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Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 -6.92%
 10%
 -10%
 6.92%

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Power Systems
Highest pressure generating pump inside the thermal plant is

All of these
 boiler feed pump
 high pressure heater
 low pressure heater

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Power Systems
The positive, negative and zero sequence impedances of a transmission line are 0.5,0.5 and 1.1 pu respectively. The self (Zs) and mutual (Zm) impedances of the line will be given by

 Zs = 0.5 pu, Zm =0.6 pu
 Zs = 0.6 pu, Zm =0.5 pu
 Zs = 0.7 pu, Zm =0.2 pu
 Zs = 0.2 pu, Zm =0.7 pu

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Power Systems
The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor?

 75%
 50.5%
 62.5%
 25%

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Power Systems
Electrostatic precipitators in thermal power plants are used for

 removal of ash from flue gas
 control flow rate
 remove moisture from the cole
All of these

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