Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Is it reuired to use house service barcket for 31/2 core 300 Sq.mm cable,if the distance between pole & shop is around 2 mtrs only or can I hang the cable with GI support in air? upto what size of cable GI serrvice btacket is necessary?

HAL,

1 3495

What is Gnat,Ant,Rabbit &Dog overhead conductor? Please explain.

1 9317

Can I do body earthing of machine by using Cable armour or I have to run another GI wire for body earthing and how many wires I need to run. Is there any rule for this. eartnig

HAL,

3 5700

can we use existing 6300V alternator for generating 6600V by increasing excitation,what are advantages & disadvantages to alternator & motors of 6600V.

GMR,

1 4126

can we charge 3 ph power transformer delta-star wound with neutral grounded 6.6kV/415V from secondary side(415V) but with primary(6.6kV) open by dg,what are the disadvantages or losses.

1 3021

why the transformer connected like STAR- STAR, DELTA- DELTA, STAR- DELTA, DELTA-STAR ...? why these connections ,,, explain the advantages these connections?

2963

what is the diff between VCB & ABCB breaker in substaions? explain the operating priciples of VCB & ABCB

1 6242

explain the operating principles of CVT & RVT

2 8300

For a certain load i need 100kw load ,In that case what rating mccb should i use?

5 12996

What are protections for dty type transformers

1771

What is Dry type transformer.How it works

Vatika,

6 15990

Where the Dry type tranformers are used.

5 7111

WHat is the general checks required for Dry type transformers

2023

what is the difference between ACTIVE POWER and REACTIVE POWER.I WANT CLEAR ANSEWER.

8 13071

how we can find out the speed of fan without using any measuring instrument

2 4922

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Un-Answered Questions { Electrical Engineering }

How impulse levels are calculated that for 11kV impulse is 75kvp, for 24kV impulse is 125kvp ?

1949

WHAT IS DEGREE OF COMPOUNDING IN D.C MACHINE MEANS? HOW TO READ THE OPERATING CHART FOR ANY ELECTRICAL MACHINES?

4806

what is the profesional board for electrical engineer what is thepast and during construction for electrical engineering

2005

HOW THE OLTC TRANSFORMER SAVE ENERGY IN COMPARISON TO OFF LINE TRANSFORMER AND IS IT ECONOMICAL TO REPLACE THE OFF LINE TRANSFORMER TO OLTC TRANSFORMER

2142

impliment (AB)`+C to transistor representation

1789

Operation of isolators.

1832

After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

1928

how rectifier transformer work in electroststic precipetatore(esp?

2556

WHAT IS IEC? & WHAT IS BENEFIT TO PRODUCT FROM IEC?

2077

how to calculate slip ring induction motor stator and rotor currents??

2208

HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

1906

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2276

how to compute kAIC? with formulas...

4183

What will happen if we introduce negative feedback to a control system that uses a positive feedback?

1045

electrical knowelge

1116

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