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ELECTRICAL POWER SYSTEM BITS

1) Y bus matrix is used for which of the following analysis 
   a) fault analysis
   b) load flow analysis
   c) power analysis
   d) none

2) Z bus matrix is used for which of the following analysis
   a) fault analysis
   b) power analysis
   c) reactive power analysis
   d) load flow analysis

3) Which of the following matrix in power system analysis is a spare matrix
   a) z bus matrix
   b) y bus matrix
   c) k bus matrix
   d) none

4) Which of the following conductors internal inductance is zero 
   a) ACSR conductors
   b) hallow conductors
   c) solid conductors
   d) none

5) Practically which of the following configuration used in transmission lines 
   a) horizontal configuration
   b) triangular configuration
   c) trapezoidal configuration
   d) none

6) Reactance relay is normally preferred  for the protection against 
   a) earth fault only
   b) phase fault only
   c) both
   d) none

7) how to eliminate the ferranti effect in transmission line 
   a) by connecting reactor
   b) by connecting capacitor
   c) both at a time
   d) none

8) Mho relay is normally used for the protection of 
   a) long transmission lines
   b) medium length lines
   c) short length lines
   d) no length criterion

9) The stability of arc in vacuum depends upon 
   a) the contact material only
   b) the contact material and its vapour pressure
   c) the circuit parameters only

10) Which time ferranti effect is occurs on transmission line 
   a) lightly loaded
   b) on full load
   c) on full load at 0.6 p.f lag
   d) in all the cases


  



                                     

                                                                                             




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