Electrical Engineering Interview Questions

What is the value of 3 phase voltage?

3542

why do we need a 4th wire in 3phase 3wire transmission line

3891

What are the limiting factor for controlling maximum hot point temperature within a hydrogen and water cooled generator?

1513

resistance of transformer oil=?

HCL,

1701

What shall be minimum thickness of firewall in between two transformers and which code specifies it ?

11780

Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)

1280

Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)

3883

what is the internal working of star delta starter

656

in a plug point why the hole size at the top is large?

TCS, Bhel,

6474

what is 'A' Check & 'B' Check ?

1624

What is single break or Double break related to MCB?

2401

How to convert KW to KVA or KVAR OR kvar/kva to kw?

47770

open circuit test when performed on double the voltage & double the freq, then what will happen with p.f and current magnitude?

457

what is an S.C.R. and how do they work?

GE,

2866

How line capacitance & line inductance varies with increase in height tower.

806

Un-Answered Questions { Electrical Engineering }

5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch

2048

which is chemical used as in ro water what is difference betweeen multi grade filter&dual media filter

472

how to Select its CORE in electrical cables based on its applications? or Application of various types of electrical cable based on it CORE?

1495

1600 KVA ka transformer hi aghar lt side par 800A aur voltage 420 ho to HT side ki cable ki rating keya ho gi?

506

Why we use circular(Stepped) cross section in transformer core?

594

please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula

633

dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

515

1. If 8.35%Z means the percentage impedance of 132kV-line from power company, we will like to reconfirm its base capacity.

480

What is the types of HT motor testing

1862

What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?

394

How do you compute voltage drop and cable size over distance?

657

When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?

562

What do you mean by Stimulastion Test in Diesel Genarator / Why & when it's conducted ?

78

what is acceptable leakage current for 33kv cable while doing high voltage test for cable? how to calaulate the leakage current for 33kv or any rated cable?

1657

How to calculate Ith (I thermal) for curent transformer

499