Q.1
An isolated generator connected to a turbine with its continuous maximum power ofMW,Hz. Generator connected with two loads of 8 MW, each operate atHz.. Generator hasdroop characteristic. If an additional load of 6 MW is added then the change in the frequency will be ____________
  • a) 0.25
  • b) 0.75
  • c) 0.5
  • d) 1
Q.2
For the given system the Ybus matrix is show below.
Questionpower-systems-questions-answers2.jpg
  • d) None of the mentioned
Q.3
If short TL is delivering a lagging power factor load, sending end p.f. would be ________
  • a) (VrcosФr+IR)/Vs
  • b) (VrcosФr+IRsinФr)/Vs
  • c) (VrsinФr+IR)/Vs
  • d) (VssinФr+IRcosФr)/Vs
Q.4
If all the sequence voltages at the fault point in a power system are equal, then fault is __________
  • a) LLG fault
  • b) LG fault
  • c) Three phase to ground fault
  • d) Line to Line fault
Q.5
The below mentioned graph is a recorded data of the voltage fluctuation of the network, then it can be concluded that these faults are __________
Questionpower-systems-questions-answers5.jpg
  • a) L-G
  • b) A three phase motor short
  • c) Feeder fault
  • d) Any of the mentioned
Q.6
The inertia constant of two groups of machines which do not swing together are 4 andMJ/MVA, the equivalent inertia constant of the system is _________
  • a) 2.85
  • b) 14
  • c) 6
  • d) 12
Q.7
A fault current ofpassing through the primary side of a 400/5 CT. On the secondary side an inverse time over current relay is connected whose current setting is 75%, the plug setting is __________
  • a) 5
  • b) 3.75
  • c) 6
  • d) 4
Q.8
The three phase line is working atHz with conductors rearranged as shown. The Cph of TL atkV is ___________
Questionpower-systems-questions-answers8.jpg
  • a) 8.75*10-9
  • b) 8.75*10-12
  • c) 26.2*10-12
  • d) 26.2*10-9
Q.9
For aMVA,kV three phase Alternator observes a three phase fault at terminals of it. If the fault current isA, the pu value of positive sequence reactance ______
  • a) 2.62
  • b) 0.46
  • c) 1.31
  • d) 0.92
Q.10
A lossless TL having SIL ofMW is provided with uniform distributed series capacitance compensation ofand shunt compensation ofthen the SIL of compensated TL will be _______________
  • a) 3949.9
  • b) 3289
  • c) 2784.9
  • d) 2877.6
Q.11
A lossless TL having SIL ofMW is provided with uniform distributed series capacitance compensation ofand shunt compensation ofthen the compensated impedance of TL will be(in pu) ____________
  • a) 0.7595
  • b) 2.88
  • c) 0.647
  • d) 3.27
0 h : 0 m : 1 s