Electrical Engineering Interview Questions

Basic motor transformer generator

348

How to perform a DC resistance test In Alternator and their proceduces?

352

if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

369

what is difference between KW and KVA

526

how to select rating of HT Panel

374

if we have 320KVA Genset kindly advice how much load we can put it.

394

For 35 HP motor how much amount of capacitor should be on in kvr to reduce the current bill

532

Why transformer used in UPS??

JLL,

437

The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

420

if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.

484

435

1.4 What is meant by CT knee point voltage and how would you determine it

461

If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?

303

If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

ABC,

299

i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

291

Un-Answered Questions { Electrical Engineering }

what is diff. between earthing grid,earthing mess, earting grid?

1288

WHY CBCT USE ONLY IN Y PHASE NOT OTHER PHASES

981

Why Utility Distribution System in India is mainly at 11 kV? Why not Utility go for 33 kV?

765

How to do cable earhing? whether by grounding Armour to ground or by running extra G.I wire along with cable? which one is preferred mostly amoung them? If the second one is more preferable how many GI wires to be run along with cable (1 or 2)?

952

which type of questions asking for solar companies?

612

Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??

1005

although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?

920

How to calculate loses in transformer of 160 KVA ?

648

how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???

885

what is the best method of grounding in 30 MW generator?

926

What is the difference between grid and off- grid system??

878

how can i get the formula to find out the cable size if i know the load of main fuse protection.

899

WHAT IS THE CURRENT CARRYING CAPACITY OF 2.5/3 CORE HI TUFF CABLE,WILL IT SAFLEY CARRY 8.6 AMPS OVER 120 METRES,CAN YOU ALSO ANSWER WITH FORMULA FOR WORKINGS OUT ,THANK YOU 3RDYR APPRENTICE.

2413

what is laser diodes?

110

There are Two questions about Steam Turbine Generator... What is HRSG bypass of LP, HP used for in power generation? In particualar, in the event that fault of HP bypass, there would be STG TRIP in operation but none on the LP bypass fault...what's the reason ?

1299