Electrical Engineering Interview Questions
Questions Answers Views Company eMail

plzzzzzzzzz plzz send me the papers of JSPL WRITTEN TEST..SO that i can prepare for the test in electrical engg..

749

tate and explain super position theorem

2 2134

explain the application of reciprocity theorom

797




How we check vector group for a Dyn1 transformer?

6 17880

why rating of motor in HP

MSL,

2 3848

What are the types of Bus bar?

CTEVT,

8 24085

sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me

HPCL,

727

from which subjects most of the technical que will b asked for hpcl(electrical).pls help me

ABB, HPCL,

854




Generally in AC we consider voltage, frequency and phase sequence for parallel operation ... Can we parallel two DC battery chargers? If yes, then what precaution to be taken when we parallel two DC power?

Reliance,

5 4117

sir please send me techinical questions for junior engineer posting in bangalore railway i am diploma holder

RRB,

747

what is the series parallel connection of capacitors? and how can we use these application in three phase motors for controlling torque?

801

Ohm's law applicable for semi-conductors?

4 7094

60 watts bulb and resistor home heater is connected in series and 230v is given to the circuit. The heater is giving some amount of heat. If instant of 60 watts bulb replace 100 watts bulb what will be the output of the heater?

NPCIL,

2 2953

can anybody sent me power grid questions. what subject should i prefer for preparation?

Reliance, Vascon,

879

different between highvoltage & lowvoltage source

5 4072


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Un-Answered Questions { Electrical Engineering }

If not into production, how far did you follow the design and why did not you see it into production?

837


What happens if i apply 500V to 440V rotary Switch ?

652


I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)

647


Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?

517


HOW CAN YOU CALCULATE PRACTICAL EFFICIENCY OF A ASYNCHRONOUS INDUCTIONMOTOR OF 7.5KW,& MOTOR IS RUNNING WITH AVOLTAGE OF 410 VOLTS,& TAKING CURENT OF 13 AMPS

641






WHICH SIZE A.B.CABLE IS USED FOR 11KV.

912


why ct ,cvt should be stored in a vertical position?

1018


What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas

360


Why does the radius of armature is less than the radius of pole shoe?

893


how to calculation increase power factor for single phase

1027


An active element is one which a. Supplies energy b. Absorbs energy c. Supplies energy and convert energy from one form to another

615


How to do stting of vl250 siemens MCCB

1682


why 5kW motor becomes unbalance if its relay trip 1st time and its set value is 7.0 A

751


I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

482


what is the difference between capacitive and resistive voltage divider?

2055