Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is bushing in transfermor

Bokaro Steel, Visa Steel,

7 7054

what is electrostatic presipitator in thermal power plant,and why it is used?

ACC,

2 5232

Why we oil in tranformer/

5 5749

how will you calculate rated Primary and Secondary voltage and Current for 2500 KVA, 11kv/443V Transformer

2 4095

how calculate cable size in squre mm, when the load is given by in kw? do u have current rating chart of elctrical cables?

4 10963

I have three phase 400 KW,390 A MOTOR.For this motor which type of Cable is required....specifically rubber cable required. Can anyone help me..

5 7583

Why celling fan rotates in anticlockwise direction and table fan in clockwise direction ? Give technical reason.

5 16434

how can we phase identification in a distribution line,how we recognise that which phase is coming for a house hold connection.help me............

1589

Which are resistive loads & which one are inductive loads : Refrigerator, Split air conditioner, ceiling fans, well pump, fluoresecent bulbs, T.V, CRT Monitors, Adsl Routers, C.P.U, Printers, Deep Freezers, Speakers, DVD Players, Microwave oven etc. ? Output Power for these Appliances Would be same like this : P = V * A * P.F Or would be changed ? thanks

3421

1. name the relay for protecting transformer 2. Current Transformer 3. potential Transformer

1 3277

Are Refrigerators & Deep Freezers the Inductive load ? How to calculate the Power Factor & hence the Output Power for them ?

4632

How can we calculate the power factor of an electrical appliance ? Is there any formula ? Is there any meter around to calculate it ? And how to use that meter ? thanks

Essar, Philips,

2 5747

upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.

ABC,

1636

how can we use isolator as breaker

4 4346

what is the formula to calculate kva genset required for a given load in kw.

3 11365


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Un-Answered Questions { Electrical Engineering }

please give me all the Alarm .Trip ,Safety Relays & Conditions of UPS Systems mail me on ashokbabunhce@gmail.com

1370


How can you calculate the size of the down conductor cable for the lightning protection system. Is 70mm2 cable can replace 95mm 2 bare copper cable when the copper tape size is 25Wx3 thk mm.

4954


previous year paper of ntpc bhel for degree in electrical enng

2765


What happen when neutral point connected to core balance current transformer? (Neutral point of an alternator of a 180KVA DG. Neutral point connected to CBCT means enter to the CBCT)

1843


Hi, Next week Iam appearing RRB exam for section engineer. So help me to get modal question papers for this position. Iam very thankful to you. Whether question will be fully techanical format or general form. Please give me a details regarding this exam.

1468






solar inverters was not connected to the nuteral link .this nutwral possible to any other systems

1353


how can we select the appropriate VCB ?

1826


Is there a possibility to use such a treshold voltage for the NMOS part of a CMOS circuit that during the switching it will start conducting only after the PMOS part will be already closed, by this eliminating the leakedge current? Please note, I'm not asking about the well bias in standby mode, but about the "antileakedge" measures during normal operation.

1571


Can we check ELCB constantly from R1 to R8 phase in 1 no DB?

1226


while doing high potential for 11KV 3 core cable how much leakage current will obtain?, what will be acceptance value?

2429


The advantages of Magnetic flux leakage technique over Ultrasonic technique for non distructive testing of material.

1494


is that any software calculator to calculate the size of cable

1866


WHY CBCT USE ONLY IN Y PHASE NOT OTHER PHASES

1624


WTA used cb?

1448


what id a dry type transformers and its function ?

1348