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ISRO EE Quiz 10
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Question 1
The minimum number of relays required for a complete protection of three phase system from the short circuit faults?
Question 2
A 500 MVA, 50 Hz, 3-phase turbo-generator produces power at 22 kV. Generator is Y-connected and its neutral is solidly grounded. Their sequence reactances are X1 = X2 = 0.15 and X0 = 0.05pu. it is operating at rated voltage and disconnected from the rest of the system (no load). The magnitude of the sub-transient line current for single line ground fault at the generator terminal in pu will be
Question 3
The admittance parameter matrix [y] is
Question 4
A 50Hz, 4 pole 400 MVA, 25 KV turbo generator is supplying rated MVA at 0.85 pf lagging. when fault occurs electrical power output is reduced by 50%. Assuming constant input to the shaft and neglecting all the losses. Electrical power output at the time of fault will be –
Question 5
For the circuit shown below if i(t)= 3e-2t cost u(t), then the voltage across the capacitor Vc(t)
Question 6
The open loop transfer function of a unity -ve feedback system is given by
The value of K that will result in a phase margin of 60° is __________?
Question 7
A sequence x[n] is shown in the figure below.
Match List I (shifted version of x[n]) with List II (corresponding sequence) and choose the answer using the codes given below:
List I
P) x[n - 2]
Q) x[n + 2]
R) x[–n + 2]
S) x(–n – 2]
List II
1) 
2) 
3) 
4) 
Question 8
The transfer function V2/V1 of the system shown in below is
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ESE & GATE EEGeneralMay 1ESE & GATE EE
