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Power Systems

Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 500 MJ
 5 MJ
 50 MJ
 10 MJ

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Power Systems
The ABCD constants of a 3-phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° â„§. The sending end voltage is 400 kV. The receiving end voltage under no load condition is

 350 kV
 400 kV
 500 kV
 600 kV

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Power Systems
Maximum efficiency of modern coal fired steam raising thermal power plants is restricted to about 035 (a low value), mainly because of

  high energy loss from turbine exhaust to condenser.
 low alternative efficiency.
 low steam turbine mechanical efficiency.
 high energy loss in boiler.

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Power Systems
Find the number of strands of ACSR conductor for 4 layer transmission line?

 37
 7
 1
 29

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Power Systems
A cable has the following characteristics, L = 0.201 µH/m and C = 196.2 pF/m. The velocity of wave propagation through cable is

 32 m/s
 159.24 m/µs
 159.24 m/s
 0.0312 m/s

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Power Systems
In thermal plant most of the energy is wasted in

 condenser
 turbines
 boiler
 ESP

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