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Power Systems

Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 six
 one
 three
 two

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Power Systems
Out of the following plant categories which is not the base load power plant?

 Diesel.
 Nuclear.
 Run of river.
  Pump storage.

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Power Systems
A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

 0.8 lag and 0.8 lead
 0.6 lag and 0.8 lead
 0.8 lag and 0.6 lead
 0.6 lag and 0.6 lead

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Power Systems
If the diameter of the conductor is increased

 the inductance is decreased
 the resistance is increased
 the inductance is increased
 no change in inductance and resistance

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Power Systems
A 3 - Φ, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is

 3600 A.
 1200 A.
 104.8 kA.
  35 kA.

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Power Systems
High capacity generators and motors are of

 any of the above
 star connected network
 delta connected network
 star connected with grounding network

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