Alternator Multiple Choice Questions and Answers
26. The slip rings employed in a 3-phase alternator in hydro station are insulated for
A.Low voltage
B.Very low voltage
C.Full armature voltage
D.Extra high tension voltage
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A.Low voltage
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27. Non-salient pole type of rotor construction is usually provided in the alternators used in
A.Hydropower stations
B.Thermal power stations
C.Either of the above
D.None of the above
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28. A commercial alternators has
A.Stationary armature and rotary field
B.Rotating armature and stationary field
C.Both armature and field rotary
D.Both armature and field fixed
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29. The load between two steam driven alternators operating in parallel may be adjusted by varying
A.Steam supply to their prime movers
B.Speed of the alternators
C.Field strengths of the alternators
D.Power factors of the alternators
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30. The maximum current that can be supplied by an alternator depends on
A.Exciter current
B.Strength of the magnetic field
C.Number of poles
D.Speed of the exciter
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