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Power Systems

Power Systems
Reflector nuclear reactor are made of

  beryllium.
 steel.
 cast iron.
 boron.

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Power Systems
Maximum power capacity of a transmission line can be increased by

 decreasing reactance value
 increasing voltage level
 either 1 or 2
 nether 1 nor 2

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Power Systems
An alternator having an induced emf of 1.6 pu is connected to an infinite bus of 1 pu. If the bus bar has reactance of 0.6 pu and alternator has reactance of 0.2 pu, what is the maximum power that can be transferred?

 6 pu
 2.67 pu
 5 pu
 2 pu

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Power Systems
What are the methods of laying underground cables?

 Draw - in - system / duct - pipe laying.
 Direct laying.
 None of these.
  Both A and B.

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Power Systems
The inductance of single phase two wire line is given by

 0.4×10-7× ln(d/r') H/m
 4×10-7× ln(d/r') H/m
 0.4×10-7× ln(r'/d) H/m
 4×10-7× ln(r'/d) H/m

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Power Systems
The daily energy produced in thermal power station is 720 MWh at a load factor of 0.6. What is the maximum demand of the station?

 50 MW
 30 MW
 72 MW
 720 MW

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