Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to calculate the heat load for a electrical room

1792

what is the difference in MCB, MCCB, RCCB, ELCB, & MPCB (motor protection circuit bracker)

Siemens, Lupin, L&T, Afcons, CIHSR, DCS, IOCL, Bhel,

12 172877

How can we calculate the rating of capacitor bank to be connected for a particular load(ex.100kw)to improve the power factor from 0.8 to 0.9?

Voltas,

4 14920




when neutral will carry the current?what could be the magnitude?

Voltas,

7 9186

if we use fuse in neutral what will happen?

L&T,

9 12398

What is Ten Delta Test ?

Areva,

8 24756

What is the importance of Form B to state Electricity Boards?

1 2271

what is the importance of Partial Dischage test for Electrical Equipments

655




The potential difference between a phase and neutral is 230v , but the potential difference between two phases is 400v. why?

HCL,

4 9864

Suppose the incoming power is 11 kw, but the load require only 8 kw means how can we save or use the excess power?

3 2811

In 90 kva alternator that produce the output voltage is 115(p-n),200(p-p) at 1500 rpms means what ampere it produced ?

714

What is the difference between INVERTER and UPS?

7 9254

what is the use of earthing ?

Electrical Tech,

8 27285

how we protect the motor & what are the components required for that ?

2 2547

Why 60Hz frequency is used in America what are all the benifits?

5 6186


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Un-Answered Questions { Electrical Engineering }

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

790


1. Design a counter which counts 0, 4, 8, 2, 6, and repeats using: 1.a using JK flip flops 1.b using T flip flops 1.c using D flip flops

585


How to calculate total harmonic distortion level(THD) in VFD? and how can we reduce harmonics?

2585


Cables Construction hi friends, 0.6/1/1.2 kV LV , DC and Control cables are concentric copper conductor what does its means and what is the use of concentric copper conductor,and are this with copper tape shield or copper screening, ? thanks

446


i have faced a problem in ro plant grunfos make bm30type pump it is 22kw pump. We start this pump using siemens 3rw 4423-ibc44, 30kw softstarter but this soft starter will frequently failier so we planed to change dol starter. So pls tell anybudy its possible or not.

695






how to carried out DAR test in 11 KV Alternator ?

946


What happens when ac supply is given as excitation voltage instead of dc supply

2032


what is the voltage between earth to neutral in lift.

562


why single CT used in DOL starter power circuit?

1084


How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?

889


how copper and aluminium wires or cables are choose for current rating? please provide copper and aluminium wire selection chart for different current rating ?

815


what is the difference between ups & inverter

3396


which book to refer in electrical engineering for iocl exam & which book for general english.

923


Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

1115


in india per day how much power is generated including all power station

645