Electrical Engineering Interview Questions
Questions Answers Views Company eMail

HAI,HOW TO SET THERMAL OVERLOAD RELAY FOR DOL STATRTER FEEDER AT START AND RUNNING?

L&T,

4 11875

HAI,I HAVE 6,60KW MOTOR FEEDERS IN MY MCC PANEL.HOW CAN I DO MY SETTINGS FOR OVERLOAD,SHORTCIRCUIT,GROUNGFAULT,INSTANTANEOUS TRIP FUNCTION IN MY 4000A CIRCUIT BREAKER?

1 2082

What power factor maintain you maintain at u r organisation

Wheels India,

14 10651




I have 500A load (WHICH IS SEPARATE MDP PANEL),an MCC panel with 4000A Breaker.Already I have 2500A load.Can I connect this load directly to the Busbar since I have PROTECTION IN MY MDP Panel ?

4 4470

During the troubleshooting of an inoperative shunt generator, you found the voltage to be 2+ volts; what is known from this. Is it (1). odds are the armature is good (2). odds are there is no field current flowing in field windings (3). odds are the armature is bad (4). both 1 & 2 are correct (5). both 2 & 3 are correct

Air Force,

2 2958

We are having a 2000KVA DG set. It trips with Over speed and Engne Hot when the mahine is stopped in full speed. How shall I analyse the block load and reverse power.Is the problem related to power factor. The machine which runs on this DG is having all Synchronous motors with incividual Drives.

1 1747

how to calulate bearing number of any motor ?

Transfield,

685

how we can find of current direction(supply comming/out going direction) when a transmission line passing through sides.

ONGC,

1052




why various test are performed on electrical panels & power cables before commissioning on site & what are these test???

Lavasa,

755

I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?

2485

sir please send me iocl written test paper in my e-mail account. i'll be obliged to you........ thank u roshan

IOCL,

877

what is the significance of KV & MVA rating of the transformer and how they are related.

8 64417

what is the permissible bend in the LT& HT CABLES.

2 3440

WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.

799

WHAT IS DGA TEST FOR THE TRANSFORMERS.

ABB,

3 15485


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Un-Answered Questions { Electrical Engineering }

diameter of cable and core is doubled then the value of capacitance is

1887


What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

942


how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?

777


advantages and disadvantages of inverse definite minimum time RELAY

17


Explain the different methods used in the choice of rotor slots for reduction of harmonic torques in an induction motor.

629






how to synchronize 3 phase slip ring induction motors of different ratings.

926


why tertiary winding is used in transformer with diagram?

900


v/f drive basic princeple

1110


wat is the current produced in a 5000v megger? when the positive and negetive terminals are touched on our body get s shock?

719


explain the Trip supervision circuit

865


pls tell me about ups internal connection & we have given only 3 phase supply to ups system how get 4 wire (R Y B N )

1390


How to calculate Grid rotor resistance(GRR) losses in slip ring induction motor?

307


The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?

687


what is dc mator?types of dc motor?losses in dc motor?what is the mechanical,electrical and commercial efficiency of a dc motor?

693


can anyone explain 11kV 3core cable megger,hi pot test procedure with connection details?

1818