A power system network with the capacity at 100MVAhas a source impedance at 10% at a Point. The fault at that point is

1.  10MVA

2.  30 MVA

3.  3000MVA

4.  1000 MWA

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4
Correct Answer :

Explanation :
No Explanation available for this question

The impulse response of linear time invariant system is given as g(t)=et,t>0 The transfer function of the system is equal to

1.  1/s

2.  1/s(s+1)

3.  1/s+1

4.  s/s+1

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4
Correct Answer :

1/s+1


Explanation :
No Explanation available for this question

The open-loop transfer function of a unity feedback control system is given by G(s)=Ke-Ts where K and T are variables and are greater than zero. The stability of the closed-loop system depends on

1.  K only

2.  Both K and T

3.  T only

4.  Neither K nor T

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4
Correct Answer :

Both K and T


Explanation :
No Explanation available for this question

Four identical alternators each rated for 20 MVA, 11kV having a subtransient reactance of 16% are working in parallel. The short-circuit level at the bus bars is

1.  500 MVA

2.  400 MVA

3.  125 MVA

4.  80 MVA

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4
Correct Answer :

500 MVA


Explanation :
No Explanation available for this question

Which one of the following polar plots corresponds to G(jω)=1/(jω)2(1+jωT)

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

A phase lead compensating network consists of only capacitors and resistors. The locations of its pole and zero in s-plane are at Pc and Zc respectively. Which of the following conditions must be satisfied

1.  Both Pc and Zc in LHS and Pc

2.  Both Pc and Zc in LHS and Pc>Zc

3.  Pc is in LHS and Zc can be in RHS

4.  Zc is in LHS and Pc can be RHS

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4
Correct Answer :

Both Pc and Zc in LHS and Pc>Zc


Explanation :
No Explanation available for this question

The following sequence currents were recorded in a power system under a fault condition : Ipositive=j 1.653 p.u. Inegative =-j0.5 P.u Izero = -j 1.153 p.u. The fault is

1.  line to ground

2.  three phase

3.  line to line ground

4.   line to line

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4
Correct Answer :

line to line ground


Explanation :
No Explanation available for this question

For a given unity feedback system with G(s)=k(s+3)/s(s+1)(s+2)(s+5) what is the real axis intercept for root locus asymptotes

1.  2/3

2.  1/4

3.  -5/3

4.  -3/2

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4
Correct Answer :

-5/3


Explanation :
No Explanation available for this question

The open loop transfer function of a unity negative feedback control system is given by G(s)=k/(s+2)(s+4)(s2+6s+25) what is the value of k which causes sustained oscillation in the closed loop system

1.  590

2.  666.25

3.  990

4.  1190

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4
Correct Answer :

666.25


Explanation :
No Explanation available for this question

A single line to ground fault occurs on a three- phase isolated. neutral system with a line to neutral voltage of V kV. The potential on the healthy phase rise to a value equal to

1.  √2 VkV

2.  √3VkV 1

3.  3V kV

4.  1/√3 VkV

View Answer  
4
Correct Answer :

√3VkV 1


Explanation :
No Explanation available for this question
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