# Objective Questions on Alternators | Part 2

- Link: https://studyelectrical.com/2014/10/objective-questions-on-alternators-2.html
- Published: 2014-10-13T12:45:00+00:00
- Author: 

16. A winding is having a number of slots is equal to the number of poles, then 
this winding is called
  (A) concentrated winding. (B) short pitch winding. (C) 
full pitch winding. (D) distributed winding.

17. Symmetrical waveform does not have

 (A) capacitance. (B) odd harmonics. (C) both even and odd harmonics. (D) even 
harmonics.

18. A synchronous machine
  (A) can operate at unity power factor. (B) can operate
at leading power factor. (C) can operate at lagging power factor. (D) can operate
at any power factor.     19. A winding is having number of slots is greater than
number of poles, then this winding is called  (A) concentrated winding. (B) distributed
winding. (C) full pitch winding. (D) integrated slot winding.

   20. When the number of slots / pole / phase is fractional, then this winding
is called  (A) short pitch winding. (B) full pitch winding. (C) fractional slot 
winding. (D) integral slot winding.

   21. When the number of slots / pole / phase is integer, then this winding is
called  (A) fractional slot winding. (B) integer slot winding. (C) concentrated 
winding. (D) short pitch winding.

   22. Which alternator are more suitable for the high-speed system?  (A) Salient
pole. (B) Non-salient pole. (C) Both (A) and (B). (D) None of these.

   23. The number of poles in turbo alternator are  (A) 2. (B) 6. (C) 8. (D) 10.

   24. When two alternator are operating in parallel and at perfect synchronization,
their synchronizing power will be  (A) negative. (B) infinite. (C) positive. (D)
zero.

   25. The stationary alternator must not be connected to live bus bars because
it will results _______________ .  (A) short circuit. (B) open circuit. (C) nothing
will happen. (D) floating.

   26. Floating of alternators with busbars occurs at when  (A) synchronized generated
emf is less than the busbar voltage. (B) synchronized generated emf is greater than
the busbar voltage. (C) synchronized generated emf is equal to the busbar voltage.(
D) none of above.

  27. Which of the following conditions is to be fulfilled, for connecting an alternator
to infinite bus?  (A) Phase sequence should be same. (B) Frequency is need not same.(
C) Terminal voltage of alternator need not to be same with existing bus. (D) None
of above.

  28. If a slot consists of one coil side then the winding is called  (A) double
layer winding. (B) full pitch winding. (C) single layer winding. (D) short pitch
winding.

   29. If the slot consists 2 coil sides of different coils is called

(A) double layer winding.
 (B) single layer winding. (C) concentric winding. (D)
distributed winding.

30. Distributed winding and short chording employed in AC machine will result in
(
A) increase in emf and reduction in harmonics. (B) decrease in emf and increase 
in harmonics. (C) increase in both. (D) decrease in both.

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