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Power Systems

Power Systems
Ferranti effect occurs under

 any of the above
 no load
 full load
 half load

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Power Systems
Condition for zero voltage regulation is

 tanφ = R/X
 cosφ = R/X
 cosφ = X/R
 tanφ = X/R

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Power Systems
Specified quantities of load bus are

 P and Q
 V and δ
 Q and V
 P and δ

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Power Systems
Which of the following is/are the disadvantages of phase modifiers?

 Initial cost of synchronous phase modifier is higher
 It requires more maintenance because of running equipment
All of these
 It consumes both active and reactive power

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Power Systems
For variable heads of near about but less than 30 meters, which type of turbine is used in hydro power station?

 Pelton
None of these
 Kaplan
 Francis

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Power Systems
If the load is short circuited, then reflection coefficient of voltage is

 0
 -1
 1
 -2

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