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Doctors Medicines MCQs Q&A

  1. Rating of the alternator must be the same as other alternators
  2. Phase of the alternator must be identical with the phase of busbar voltage
  3. Terminal voltage of the alternator must be same as busbar voltage
  4. Frequency of the alternator must be same as busbar voltage
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1 Answers

Option 1 : Rating of the alternator must be the same as other alternators

Synchronization of alternator means connecting an alternator into the grid in parallel with many other alternators, which is in a live system of constant voltage and constant frequency.

Before connecting an incoming alternator with an already operating alternator, the following conditions must be satisfied:

  1. Equal voltage: The terminal voltage of incoming alternator must be equal to the bus-bar voltage.
  2. Same frequency: The frequency of generated voltage must be equal to the frequency of the bus-bar voltage.
  3. Phase sequence: The phase sequence of the three phases of alternator must be similar to that of the grid or busbars.
  4. Phase angle: The phase angle between the generated voltage and the voltage of the grid must be zero.
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Related Questions

In the following question the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct.. 1. Industrially raised chicken can be abnormally forceful, and are regularly kept in obscured sheds to avoid them pecking at each other. P. The feathered creatures invested much a greater amount of their energy—up to a third—pecking at the lifeless things in the pens, as opposed to fowls in different pens which invested a considerable measure of time assaulting others. Q. In low light conditions, they carry on less pugnaciously, yet are more inclined to ophthalmic scatters and respiratory issues. R. In an examination, forceful head-pecking was everything except killed among fowls in the improved condition. S. Modifying the birds’ condition, by adding parcels of wood-shavings to their pens, can work wonders. 6. Bundles could lessen forcefulness and decrease wounds; they may even enhance efficiency, since a glad chicken is a profitable chicken.?
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