I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id: vsujith_rajan@yahoo.co.in
RRB,
3 4365can any one help me? 1.what is corona extinction voltage&corona inception volatage 2.what is mean by CFVV?
KSEB,
1 12193which type of breaker sould be used for different level of voltage ? (i.e at 11 Kv, 33 Kv, 66 Kv....
8 17867What happen if we re-start H.T motor whose rotor is running at 40% rated speed. Is it will damage motor winding?
1 2868If an induction motor is restarted before its rotor stop rotating, then what will be the amount of current drawn? Is this current will be the same as motor starting current?
5 6102without any theoretical calculations, can u approximately tell the current rating of a motor(above 30hp)working at 415VAC.
7 7448Post New Electrical Engineering Questions
why the India electrical supply transmission loss is high when compare to us
explain with diagram how to protect transformers and substations from over current with help of CT's?
State ohm’s law?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
Explain advantages of storage batteries
What is dielectric loss?
how to calculate insulation level of transformer?
i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester
Dear all i want to know SEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me zohairaukllah@yahoo.com
75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?
is oil viscosity affect on motor current?
How many turns are there in primary winding? (In Transformer)
i need list of swg(standard wire guage) or area of conductor v/s current carrying capacity of conductor copper & alluminium...
what is different between phase and netural
what is protection class current transformer.
