1
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
A $$1000$$ $$kVA,$$ $$6.6$$ $$kV,$$ $$3$$-phase star connected cylindrical pole synchronous generator has a synchronous reactance of $$20\Omega .$$ Neglect the armature resistance and consider operation at full load and unity power factor.

The power angle is close to

A
$$13.9$$ degrees
B
$$18.3$$ degrees
C
$$24.6$$ degrees
D
$$33.0$$ degrees
2
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
The synchronous speed for the seventh space harmonic $$mmf$$ wave of a $$3$$-phase, $$8$$ pole, $$50$$ $$Hz$$ induction machine is
A
$$107.14$$ rpm in forward direction
B
$$107.14$$ rpm in reverse direction
C
$$5250$$ rpm in forward direction
D
$$5250$$ rpm in reverse direction
3
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A hydraulic turbine having rated speed of $$250$$ $$rpm$$ is connected to a synchronous generator. In order to produce power at $$50$$ $$Hz,$$ the number of poles required in the generator are
A
$$6$$
B
$$12$$
C
$$16$$
D
$$24$$
4
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A $$500$$ $$MW$$ $$3$$-phase $$Y$$-connected synchronous generator has a rated voltage of $$21.5kV$$ at $$0.85$$ $$pf.$$ The line current when operating at full load rated conditions will be
A
$$13.43$$ $$A$$
B
$$15.79$$ $$kA$$
C
$$23.25$$ $$kA$$
D
$$27.36$$ $$kA$$
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