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POWER SYSTEMS

Power Systems
Operating time of pumped storage plant is

 can't say
 very high
 high
 low

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Power Systems
Advantages of per unit system is/are

All of these
 Need of transformation ratio
 It has units for all quantities
 No units for any quantity

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Power Systems
Sparse matrix is matrix which contain

 less number of memory elements
 more number of non zeros
 more number of zeros
 more number of memory elements

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Power Systems
How to find the total number of strands (N) when number of layers (x) are given

 Total number of strands N = 3x² - 3x - 1
 Total number of strands N = 3x² + 3x + 1
 Total number of strands N = 3x² - 3x + 1
 Total number of strands N = 3x² + 3x - 1

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Power Systems
Reactance relays are used for the protection of

 long transmission lines only
 medium transmission lines only
 short transmission lines only
All of these

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