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Power Systems

Power Systems
Cheapest plant in operation and maintenance is

  hydroelectric.
  diesel power.
  nuclear.
  steam power.

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Power Systems
Reheat cycle in thermal power plant is used to

 utilize heat of flue gases.
 improve condenser performance.
  increase thermal efficiency.
 reduce loss of heat.

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Power Systems
The receiving end voltage for a long line under no load condition is

 equal to the sending end voltage
 less than the sending end voltage
 more than the sending end voltage
 any of the above

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Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

 7.25 pu
 2.5 pu
 3.75 pu
 4.28 pu

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Power Systems
The power output from an hydroelectric plants depend on

 type of turbine, type of dam and type of catchment area.
 type of dam, type of catchment area and discharge.
 type of dam, head, system efficiency.
  discharge, system efficiency.

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Power Systems
The SWR on a lossless transmission line of the characteristic impedance 100 ohm is 3. The line is the terminated by

 A resistance of j300 ohm.
 A resistance of j100/3 ohm.
 A resistance of 100 ohm.
 A resistance of 100/3 ohm.

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