ALTERNATOR 3
Alternator Mastery Quiz
Test your knowledge on alternators with our challenging quiz designed for electrical engineering enthusiasts and professionals. Whether you're preparing for an exam, brushing up on your skills, or just curious about alternators, this quiz covers essential concepts in a fun way!
- 10 thought-provoking questions
- Multiple-choice format for easy answering
- Immediate feedback on your performance
21. In an alternator, for a coil having a span of 2/3 of pole pitch, the coil span factor will be ___________
0.866
0.707
0.6
0.2
22. The speed of an alternator is changed from 3000r.p.m. to 1500r.p.m. The generated e.m.f./phase will become ______________
ONE FOURTH
HALF
DOUBLE
UNCHANGED
23. In an alternator the armature reaction is mainly influenced by ___________
The power factor of the load
Short circuit ratio
Speed of the alternator
Total current drawn
24. Regulation of an alternator supplying resistive or inductive load is ________
Always negative
Always positive
Either of the above
None of the above
25. Non-salient pole type of rotor construction is usually provided in the alternators used to _____________
Hydro power stations
Thermal power stations
Either of the above
None of the above
26. Generated e.m.f. For same field current and double speed will be _____________
Same
Double
Less than double
More than double
27. A commercial alternator has _______________
Stationary armature and rotary field
Rotating armature and stationary field
Both armature and field rotary
Both armature and field fixed
28. The power factor of an alternator is determined by its ____________
Prime mover
Excitation
Speed
Load
29. For parallel operation, A.C.polyphase alternators must have the same ___________
KVA rating
Excitation
Speed
Voltage rating
30. Unlike D.C.generator kW rating, alternators are rated in _________
MW
KVAR
KWH
KVA
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