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ESE-2018 Electrical Engineering Quiz 25

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Question 1

Taking the density of water to be 1000 kg/m3, how much power would be developed by a hydroelectric generator unit, assuming 100% efficiency, with 1.0 m head and 1.0 m3/s discharge?

Question 2

Reactive power compensation is applied at the midpoint of an EHV line of total reactance 0.2 p.u. so as to maintain the voltage there at 0.98 p.u. The voltage at both ends of the line is 1∠0o p.u. The steady state power transfer limit, in p.u. is

Question 3

Which one of the following fuels is used by the slow thermal nuclear reactors for power generation?

Question 4

The per unit value of a 4Ω resistor at 100 MVA base and 10 kV base voltage is

Question 5

The direct axis reactance Xd of a synchronous generator is given as 0.4 p.u. based on the generator's name plate rating of 10kV, 75 MVA, The base for calculation is 11 kV, 100 MVA. What is the pu value of Xd on the new base?

Question 6

For a graph of power system network shown in the figure below, where bus numbers and impedances are marked, assuming equal R/X of impedances, find the bus impedance matrix element Z22.

Question 7

Two generating stations connected to a load centre having capacity of 50 MVA and 75 MVA deliver 100 MVA to the load. The incremental cost of plant 1 is 15 + 0.15 P1 and that of the plant 2 is 18 + 0.15 P2. What are the values of P1 and P2, respectively?

Question 8

If the inertia constant H= 8 MJ/MVA for a 50 MVA generator, the stored energy is
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Nov 19ESE & GATE EE