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Per Unit System Part - 1 GATE 2024 Fundamental Quiz

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Question 1

If the capacity of an alternator is increases by 4 times and voltage is halved then what will per unit reactance of an alternator –

Question 2

A 80 MVA, 11 KV synchronous generator has an impedance of 8 Ω. Calculate the per unit impedance of generator, if the Machine rated at the base value of the system?

Question 3

A short transmission line is operated at a 0.8 P.f Lagging. The per unit impedance is given as is 0.02 p.u calculate the impedance angle of the transmission when the voltage regulation of transmission Line is 16%

Question 4

Which of the following is per unit reactance diagram for the system shown below.

Question 5

What is the per unit reactance on alternator if the capacity of alternator is tripled and voltage is halved?

Question 6

A 250 MVA, 11 kV synchronous generator has an impedance of 1.8 p.u. What will be the per unit impedance at 400 MVA and 10 kV ?

Question 7Multiple Correct Options

A 100 MVA, 230/100 kV power transformer has per unit impedance 0.4 p. u on low voltage side. Which of the following is/are true?
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