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Power Systems

Power Systems
Pelton turbine is a ----------- turbine

 axial flow
 inward radial flow
 impulsive
 any of the above

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Power Systems
The load current in short circuit calculations are neglected because

 nether 1 nor 2
 short circuit currents are much larger than load currents
 short circuit currents are greatly out of phase with load currents
 both 1 and 2

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Power Systems
A 200 MW capacity generator has a speed regulation of 4% for a frequency drop of 0.05 Hz. Find the power input supplied by the turbine for maintaining constant frequency?

 10 MW
 5 MW
 20 MW
 15 MW

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Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.5 pu
 0.4 pu
 0.1 pu
 0.2 pu

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Power Systems
IF the time of operation of a relay for unity TMS is 10 sec then the time of operation for 0.5 TMS is

 none of these.
 10 sec.
  5 sec.
 20 sec.

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Power Systems
Condition for zero voltage regulation is

 tanφ = R/X
 cosφ = X/R
 tanφ = X/R
 cosφ = R/X

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