Electrical Engineering Interview Questions

why Y CONNECTION IS BETTER INTERMS OF EFFICIENCY AND P.F FOR A LAOD LESS THAN 40% AND WHY AFTER DELTA IS BETTER FOR > 40%

1523

what is real and reactive power?

3601

what is mean by drives?

1551

what is Bucholtz Relay test???? Explain??

KSEB,

6727

What are the procedures followed for underground cable laying.....???

KSEB,

9954

Give a brief idea about Control circuit wiring in Substation...???

KSEB,

5168

what is oti and wti

7268

why we choose 50 or 60 hertz not other value for the power system?

6712

how maney type tempereture measurement ?

1879

Why the rating of dc machine is in HP??/ Do reply guys..Its very important......

5797

why transformer ratinh is in KVA????/

8148

what is the relation between the size of the machine and the frequency? (when the frequency increases the size of machine will increase,why?)

4188

why we have and use 3 phase not 2 or 4 or other in power system?

1734

can I improve the furnace power factor (10 mva transformer) by adding a capacitor bank before the transformer.Does system power factor vary a lot with the furnace PF?

1643

what is trip circuit supervision relay? How does it work in switchgear?

37108

Un-Answered Questions { Electrical Engineering }

Explain Even and Odd signals?

1473

The inventer is a battery, but if lost current at home u will turn on the fan but the is AC and inventer battery is dc . Then how the fan was rotating. What device Or machine in fan converst the Dc power to Ac power

653

What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor

1029

How to calculate the copper in HT motors if KW, RPM & Voltage is given

2636

what is the difference between megger and earth resister ??

1389

2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?

1640

how to differentiate a mpcb,mcb with a contactor? Explain their working operation

1691

working principle of AC Servo Motor with its construction

8398

what will be d.g. capacity to cater together for 14hp A.C. load & 3kw lighting load

1601

when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??

1562

What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?

695

I COMPLITED MY B.TECH AND 10TH CLASS WITH 70%MARKS BUT 12TH CLASS 55%MARKS..CAN I GET INDIAN RAILWAY RECUREMENT EXAMINATION?

1773

Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

1618

what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?

1940

Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

1510