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Power Systems

Power Systems
Specified quantities of slack bus are

 P and V
 V and δ
 P and Q
 P and δ

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Power Systems
Which of the following is a reaction turbines

  Kaplan and Pelton turbine.
  None of these.
  Francis turbine and Kaplan turbine.
  Pelton turbine and Francis turbine.

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Power Systems
The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of

 high energy loss in condenser
 low alternator efficiency
 high energy loss in boilers
 low steam turbine mechanical efficiency

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Power Systems
The area under a flow duration curve represents

 total power available.
  total quantity of run-off during that period.
 maximum rate of run-off during the period.
 total of units of energy available.

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Power Systems
A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?

 medium transmission line
 long transmission line
 short transmission line
 any of the above

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Power Systems
Units of incremental cost is

 Rs/MWhr
 MWhr/Rs
 Rs/hr
 RsMW/hr

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