If a current -8+6sin6t is flowing three ammeter, one is a centre zero PMMC meter, one is true rms meter and one is moving iron meter. What are the reading of these three meter respectively?

0 Answers   National Insurance Company Limited,

---

why 1.7Uo for HV cable Hi pot test?IE standard why?

0 Answers   ABB,

---

33kv Rated output avilable in market (any where in india)

0 Answers   C2C,

---

Why transformer rating in kVA not in kW?

5 Answers   ABB,

---

respected sir, sir recentely i have applied for chennai and tiruvananthapur section enggineer and juniour engg in electrical dept. but still i donot get how i have to syart my preparation and also t the same time i donot know exactly what they r going to give in the examinations i mean which sections they r going to give i donot know exactly, can u prefer whichh books i have to follow and model papers or both boards

1 Answers  

---

what is prniciple of three phase IM?

3 Answers  

---

what is servo motor & how does it work.

0 Answers  

---

what is mean by dry frequency

0 Answers   Siemens, TCS,

---

WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

0 Answers  

---

what will happen if delta - star , 400V to 6.6KV step up transformer neutral is not grounded, Neutral is not used but transformer is provided with neutral.

2 Answers  

---

in dc machines in the armature nature of power is ac but why we take rasistance instead of impedance?

1 Answers  

---

Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

0 Answers  

---