Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

How to calculate the heat load for a electrical room

3039

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

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

12 188922

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 18811

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

Voltas,

7 15128

if we use fuse in neutral what will happen?

L&T,

9 19125

What is Ten Delta Test ?

Areva,

8 32439

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

1 3995

what is the importance of Partial Dischage test for Electrical Equipments

1879

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

HCL,

4 21507

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 5979

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

1995

What is the difference between INVERTER and UPS?

7 14910

what is the use of earthing ?

Electrical Tech,

8 34612

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

2 4987

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

5 10544

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Un-Answered Questions { Electrical Engineering }

What are the advantages and disadvantages of closed-loop control system?

1153

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

3451

Is it required to lay 2 runs of GI wires along with armoured cables from one power DB to another Power DB?

1905

Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?

1453

how to calculate the torque of a motor?

2080

what is the difference between electrical choke and electronic choke?

2491

This is urgent!! What is a Thyristor-based 3-ways selector switch with Zero crossing control? how does it operate and where is it mostly found in a system?

2018

What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?

1053

(1)WHAT HAPPENS WHEN SUDDENLY LOAD GIVEN TO THE INDUCTION MOTOR ? (2)CAN WE MAKE WOOD AS MAGNET ? (3)WHAT IS THE VALUE OF MAGNETIC FLUX DENSITY IN TRANSFORMER ? (4)WHY WE ARE USING ELECTROMAGNETI NOT ELECTROSTATIC IN MACHINE ?

2136

What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.

2281

How to calculate the current of Highpressure Mercury Vapour Lamp?what is the basis?whether we have to consider power factor or not?

2096

does the Trivector Meter of three phase automatically takes care of the low power factor and gives the reading accordigly or it does not take care of the Power factor while giving the readings please explain

1867

Explain Random and Deterministic signals?

1763

how much leakage current is allowed in MC61A L&T make relay?

3618

Is RTCC panel needs any control supply.

1999

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