Electrical Engineering Interview Questions
Questions Answers Views Company eMail

wwht is wave trap used in ht line

4 5953

why use celling fan wing is two or three ?

2 4291

How can we calculate the KVA rating of a Distribution transformer from its core details?

ABB,

1732

How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?

HAL,

1568

What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.

ABB, HAL,

3 8604

We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

Siemens,

5 10752

explain in detail HV & LV bushing connection in power transformer (110 / 11 kv 16 MVA)

TNEB Tamil Nadu Electricity Board, wbsedcl,

6 18388

How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?

13422

When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?

1 3204

How can I communicate with an Areva MiCOM P121 relay by RS485 port? In other word, which command can I send and what information can I have recieved? please send some refrences, please. thanks

3 9647

the distance from my office to d.g is aprox 400mtrs and voltage drops ibn my office near about 40 volt what should i do p[ls suggest.

6 5912

1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.

Wipro,

1655

Can we operate a DG Set in paralell with Transformer ?

NDDB, Sobha Developers,

6 11958

what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??

9034

in flemings lefthand rule thumb indicate for....

APPSC,

2 4585


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

how to check regenerative load in drived motor

1825


why we dont prefer ac voltage controller instead dimmerstat [if both have same rating] for conducting experiments in laboratories?

1822


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

3845


What do you mean by the zone of protection?

745


The slip during plugging operation is given by= A 1-s B 2+s C 1+s D 2-s

2551






What is meant by reverse polarity and how it can be fixed?

853


A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.

1812


Why is better to have a minimum ceiling voltage of 250% than 160%?

1521


How can eliminate noise problem inside temperature controller temp. variation due to contactor chattering problem.

1299


What is the suitable transmission voltage?

793


Why the symbol of register is "zig zag"

1285


Two liquids hot and cold in two vessels are there and an metal bar acts as a conductor of heat between the two vessels. what happens then. what happens after 24 hrs?

1813


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

3859


Differentiate between kirchhoff’s first law and kirchhoff’s second law?

749


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

740