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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

HOW TO CALCULATE THE CABLE SIZE FOR POWER CABLE, CONTROL CABLE AND INSTRUMENT CABLE

CA,

2 9383

what is the difference between KW and KVA?

15 60811

how do find power factor in practically and what it means?

3 5593

why transformer rating in kva ?

Eltel, RRB,

14 16389

Why the transformer rating is denoted in VA rating why not in KW

7 12567

what are the types used for alternator earthing,what will happen if more than two alternator is working in parallel with each having own system earthing.is there any possibility for circulating current in between two system.

BEL,

3 7806

What is the reactive power and how to control the reactive power in power plant

14 19642

Why we should use delta connection in primary and star connection in an distribution transformer, which converts 400v a.c. voltage to 33kv.

ABC, Kirloskar, Sify,

15 39738

What is the difference between CRNO and CRGO in an transformer and what is the advantages of these two.

Anchor, CIL, ETA, Kirloskar,

13 59701

sir iam from electrical and electronics branch ,can i appear for the hpcl offline requirtment? if yes please mail me on vikram_raju25@yahoo.co.in

HPCL,

1143

i want bhel placement paper for electrical if anybody having pl send to my id kavitha867@myway.com immediately

Bhel,

1116

in india,we use 230V,50 Hz,whereas many other countries use 110V,60Hz.what r d advs and disadvantages of each of them?

11 21507

What is the difference between Neutral and Earth

Bhel,

6 7499

How do you select a cable size(cu and Al) for a particular load

Pepsi,

6 9555

How do you select a cable size(Cu&Al) for a particular load

Adhunik, BPCL Bharat Petroleum, Hiecon, TATA,

10 26967


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Un-Answered Questions { Electrical Engineering }

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

1070


What is reactive power and where it is used.

759


What is the difference between electronic regulator and ordinary rheostat regulator for fans?

199


Why the magneti fields are not passes from southpole to north pole

1216


Comment on the working principle of operation of a single-phase transformer.

223






How can we findout the maximum efficiancy of Transformer? At which load?

1197


raleigh method

1182


What is the principle of HIGH SPEED DIRECT DRIVE MOTOR ?

1138


What is the meaning of utility ground and clean ground? How the distribution panel is grounded?

1636


what is differentila pilot supervision in the incomer control panel in the power station?

1108


Define de-sensitivity?

213


I want to replace the 3 KW DC motor with AC motor so what should be the rating of AC motor? Details Of DC motor to be changed with AC are - Kw - 3, Vf - 310, If - 0.15, Va - 400, Ia - 13, RPM - 2400

950


DG SET BLOCK DIGRAM

1309


Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.

820


in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com

1595