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Electrical Engineering Interview Questions

In a 11KV 3phase system do you need to earth both sides of the cable?

4170

what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)

1215

what is the main difference between simplex RTD and Duplex RTD?

59418

by using pump duty, how we will can calculate the motor duty(KW)? is there any standard or formula.

HP,

1075

why most of junction box vendors providing T5/T6 Temp class jb's for T3 area any special reason?

1133

what will be the motor terminal box connection arrangement (star or delta). on what basis it decided?

6993

what happens if the phase sequence of parrlel connected sys will changed & phase displacement

2138

What is the actual formula for transformer short circuit test? below i given rating of the transformer.. 1000KVA, pri 11KV, Pri amp 56A. %Z 5.95..

4423

What do you mean by per capita requirement of electrical energy in india

1175

why cant we use earth as neutral at home whereas neutral is actually grounded at transformer end?

4715

What is meant by a stray loss of a induction motor??? What is the equation to find it

2044

when a airgap of the induction motor gets larger does it draw more current ??? does it power factor gets lower?

2963

how to maintain frenquncy with syncronising sub-station for distribution

1195

use of choke in APFC panels

3987

What is the de rating factor of cable? What is the importance of the de rating factor in cable select

1391

Un-Answered Questions { Electrical Engineering }

HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

1181

What is open loop and control loop systems?

146

what is the difference between 2 way and 4 pole selector switch???

1365

Why are iron cores in transformers made laminated?

176

3ph motor running with unequal kw and different pf what are the reasons

765

Keywords: Die, Card, Coin, B/N 2 To 12

199

what are the reasons of CT circuit faulty in busbar protection scheme?

489

A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?

1032

What is a surge supressor why its is used in synchronous generators

1086

WHAT HAPPENED DC SERIES MOTOR FIELD WINDING OPEN. CAN POSSIBLE.

2483

what is the minimum recommended leakage current of an earthed cable connected to the body or skid of an alternator

1090

Why the cores of large transformers build up of circular cross section?

1091

with help of neat sketch explain principle of TIG welding process

839

how to find out 3 phase complex power in per unit in unbalanced system?

1118

why so maney smaller size capacitor use instead of single Big size capacitor in apfc panel

936