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Reliance Energy Placement paper 26th Dec 2007

Posted on :12-04-2016
WRITTEN TEST (Electrical):


Q1. In a series  RLC circuit Fo  is  resonance  frequency, if  LC r  doubled what  is  new  resonance frequency?


Q2.  R=5 ohm, V= 5v, f=200 hz, and given conditions r   VL=VC= 2VR , find    L=?


Q3.  Comparision between maxwells and hey bridge.


Q4. VPQ=?


Q5. Find  R   in a balanced bridge network.?


Q6.  Choose right  statement among following….

ANS:  CT secondary should not open.


Q7. In a Transfer   at    no –load      friction and windage losses   r   called   as   ………..

ANS:   Iron losses


Q8. Maximum   power  transfer through line ..V1= 110 kv, V2= 100kv, X=22 ohm,….

ANS:  500 mw


Q9. Shunt   reactor   effect  on Transmission Line


Q10. Series capacitor   effect  on Transmission Line


Q11.   Velocity  in distilled water(e= 81)…magnetic field intensity find electrical field intensity(I did not remember)


Q12. Question on pointing vector


Q13.   If a dc machine (p=6;z=some value ;r=some value having lap winding then re winded machine winding as a wave winding find armature resistance?


Q14.   In a Dc series motor having 2 pice of field winding in series   if the field winding is re- wounded as two parallel paths then speed of motor(at constant  torque)


Q15.   For above rated speed the type of speed controls method (in case of DC motor)?


Q16.  Statements regarding transformer (1.constent flux.2..3..4..)


Q17.  Question on regulation of alternator at  zero leading PF

ANS:   50)


Q18.   Question on power transmission in Transmission line   Transmission line having 2 generators at either ends A,B. To reduce the power angle …….

ANS: decrease power B and increase power A.


Q19. Regarding  relay   parameters,  settings.(problem)


Q20.  In a synchronous motor if load is increasing then armature current is decreasing then initially machine is operating at what PF?( I AM NOT SURE …..

Q21. IN  slip ring induction motor if the supply is given to rotor and stator is SC ted then the speed of motor W.R rotating magnetic field?


Q22. At what condition synchronous  machine absorbs  reactive power ?


Q23. Question on parallel operation of alternators load sharing?


  
   






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