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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the rating of a power transformer?

ACME,

1 2906

I have an 15A fuse MCB that controls a night storage heater. It needs replacing and is now obsolete. Is a 16A C curve MCB the correct replacement?

2 2163

1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

L&T, PK,

1287

george phenomenon of synchronous machine

JU,

6084

Q) Write VBscript code along with QTPscript code in QTP tool for below scenario 1. Launch yahoo site(i know) 2. Do loogin(i know) 3.Click inbox link(i know) 4.Go to every page of mail box and count no.of read mails and no.of unread mails(i know) 5.Store page numbers, read mail count and unread mail count in a new excel file sheet 6.Create 10 types of graphs on that data 7.Do logout and close site(i know) 8.Save new excel files with graph

1594

what is thermal setting and magnetical setting?

1 2327

How to connect the chemical earthing and complete process tell me plz

991

how to calculate the ac and dc wire losses with calculations plz tell me

Apollo,

3 3439

I want to wire sizing calculator which website is available it

1 2128

in india are trains run by DC or AC? if DC , from where it receives negative potential? because pentograph receives singe potential only?

GATE, PSU,

2 3287

What is the difference between in Fourier series and Fourier Transform. and please tell me the difference between both of them and the why we use them in communication system?

1087

Why there is no provision of breaker in between primary of UAT and generator

1 1999

a power supply to be constructed from voltage cells is required to provide Max. 20A Current with a terminal voltage of 6v.Several voltage cells are available each of which has terminal voltage of 1.5V & each of which can supply a max current of 5A .the no of cells required will be ??

5 2752

What are the safety devices on Cumins Diesel Generators from 500 kva to 1500 kva.

Maruti Suzuki,

1 2750

What are the safety devices on Cumins Diesel Generators from 500 kva to 1500 kva.

Maruti Suzuki,

1 3316


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Un-Answered Questions { Electrical Engineering }

1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

1061


What is the loss of transformer of 220kv/11kv, 63/80 MVA and 18.05% impedance

1107


how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

1183


at what base you will tell the direction of rotation of dc motors and generators?

215


What is the difference between electrical earthing and electrical grounding?

203






How to Prepare preventive maintenance shedule of machine tool.

1065


I NEED RRB SYLABUS FOR JE ELECTRICAL ,PLEASE SEND TO MY E- MAIL ID joo28_eee@yahoo.co.in

2006


plz send me Bhel, Mahagenco, sbi previous exam paper for electrical engineer on my email-id kambali_smita@yahoo.co.in

1452


What are factors to be considered while we selecting the Core Balance Current Transformer for Earth fault protection

1032


To make a basic instrumentation amplifier, it takes A One op-amp with a certain feedback arrangement B Two op-amp and seven resistors C Three op-amps and seven capacitors D Three op-amps and seven resistors

1072


Explain about p.t?

220


please send me latest & previous years question papers for IOCL Technical level questions

1028


what is transient enclosure vltage , very fast transients, very fast transient over voltages

1149


why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?

2674


How many lightning arrestors to be installed on 50MX60MX10M building and is there any formular for that?

1020