Electrical Engineering Interview Questions

difference b/w semiconductor and dielectric

12537

does any one know where we can purchase insulation oil for high voltage oil filled cables

1867

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,

4425

What is CBCT ? Why & Where it is used?

BCT,

81847

can any one help me? 1.what is corona extinction voltage&corona inception volatage 2.what is mean by CFVV?

KSEB,

12241

Why diversity factor are applied to the load?

8968

which type of breaker sould be used for different level of voltage ? (i.e at 11 Kv, 33 Kv, 66 Kv....

17971

what happens if commutator is removed in an dc machine?

5012

why maintain the Dg PF is 0.8? Explain?

14046

What is mean demand of the Plant?

4001

How can we checked Killo Watts of Motor & Alternator?

1700

What happen if we re-start H.T motor whose rotor is running at 40% rated speed. Is it will damage motor winding?

2890

If 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?

6151

without any theoretical calculations, can u approximately tell the current rating of a motor(above 30hp)working at 415VAC.

7542

what is meant by negative sequencing in power system.explain in detail

1884

Un-Answered Questions { Electrical Engineering }

What is the angle of inclination for the oil connection from transformer conservator to Bucholz relay and why?

1703

List examples of voltage source?

622

We have two APFC panels in same station. I need how to connect CT in two APFC panels.can we take one CT in series connection or two separate CTs.

991

What is the minimum underground tank size capacity considered for firefighting purpose?

1487

3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??

898

what is level 2 automation?

2726

can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.

4470

How many types of interlocking use in screw type air compressor,make-Kaser(BSD MODEL)?

1610

What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas

1226

If Neutral Grounding Resistor (GR) failed/shorted. Is it repairable.

1157

What is the difference between the impedance percent and impedance voltage ?

1704

I am interested to know what does 15 KVA DG set actually means? If I dont know the DG rating, is it possible to identify KW by simply knowing the diesel consumption?

1622

What is online and offline ups? how does it works?

1627

Give idea about General Engineering. From which book i can study this topic. Pl. reply me via email. My email is ravi@bhelhwr.co.in, also give the name of book/website, from where i can prepare it.

1618

what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:

1535