Electrical Engineering Interview Questions

Can the Neutral and Body Earthpits of a transformer conncted together by Earth strips under ground.

9468

What is the battery voltage limit

2450

How much load with stand the copper cable by sq mm apro..

2957

why use generator Earthing/Graunding.

5686

what is earthing.how we make it,describe briefly.

HAL,

1102

If one 10 Hp 3phase induction motor connected in 380volt 50Hz. and again its connected to 380volt 60Hz. howmuch currrent and power take on both time?????

3318

how to calculate AH of a battery?

32744

define digital electronic

791

Can any one explain me about 2 phase motors ?

L&T,

3091

What is the difference between Isolator & Load Break Switch?

37696

does a DG set has low fault level as compared to that of a transformer.If yes then why.

689

what happenes if the core of the transformer saturates?

4982

1.In two wattmeter method if one wattmeter shows Negative reading then wat is reason? 2.Wat is the reason for low voltage in houses? 3.Wat is meant by current and voltage? wat is difference between the two?

40647

what is the easiest method of short circuit current calculation ? pls. derive with a mathematical example in real life application.

1217

how to calculate the no. of earth pits required for an electrical installation?

4507

Un-Answered Questions { Electrical Engineering }

Can anyone explain me about the capacitor calculation

808

Define end float in a motor?

4628

Please brief working principle & construction of permanent magnet AC Servo motor

971

Is it a better option to procure screw type air compressor rather than reciprocating air compressor?If so, what is the reason?How should we select an air compressor(100 CFM)? Please mention the important parameters of air compressor.

769

Why is tan-delta test and capacitor measurement done on alternator?

775

674

1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?

829

what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW

5887

How to findout raw or ups power? its not indicated in socket,

780

The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

1204

what is the max. acceptable leakage current in 33kv bus bar

1380

Types of test in Switchgears, MCC, NGR and DB's how it should be procced. Can anyone give me the details here or email me to pasuvaraj.k@gmail.com

811

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

960

l&t switch FN 63 handle position can we change

1270

How many types of oil using in H/T & L/T Oil Circuit Breakers. need Explenation ?

1476