Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to calculate the heat load for a electrical room

2578

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

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

12 184609

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 17383

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

Voltas,

7 12830

if we use fuse in neutral what will happen?

L&T,

9 16705

What is Ten Delta Test ?

Areva,

8 30010

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

1 3295

what is the importance of Partial Dischage test for Electrical Equipments

1443

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

HCL,

4 19989

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 4665

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

1569

What is the difference between INVERTER and UPS?

7 12715

what is the use of earthing ?

Electrical Tech,

8 32348

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

2 3960

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

5 8706


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Un-Answered Questions { Electrical Engineering }

If we use 250A MCCB as a incomer in Control panel for a fault level of 50kA for one second ,assuming temperature rise from 85 Deg. to 100 Deg , Then what will be the Aluminium Bus-bar size for 250A MCCB? Explain in detail.

1817


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

1378


WHAT IS THE USE OF PIG TAIL IN WINDOW CT ?

1879


How impulse levels are calculated that for 11kV impulse is 75kvp, for 24kV impulse is 125kvp ?

1510


why we used dc supply for field in dg set

1895






How to choose size of the cable w.r.to current carrying capacity ...

1655


why are installed water leakage detection system data centers & server rooms

1818


What is gross error?

665


difference between main metering kiosk and check metering kiosk

2292


If one lamp connects between two phases it will glow or not?

590


why transformer tank is in rectangular shape what happen when it is in step shape

927


how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.

1419


how to check ac servo motor

1695


how to calculate compresor capacity?

1650


tell me about eletrical contractor

1502