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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

How will you calaculate the Ct ratio based on connected load 500KVA,and 11KV supply ?

3 12900

what is the diff. b/w balanced and unbalanced load..?

12 52861

what is synchronous speed.? if an induction motor is made to run at full load, then is this synch. speed too..?

2 7555

why power is generatd at 50 hz only..? can we do this on another freq...?

7 9629

What will happen if we give DC supply to AC motor?

9 37777

What will happen if we give AC supply to DC motor?

4 14198

What is the formula for calculating the Instantaneous Short Circuit & overcurrent for any breaker

2009

In case of power/distribution transformer what is percent impedence?

1 3833

If we increase frequency in transmission line in lieu of voltage what will happen?

1 5052

How can be decreased the size of transformer?

6 8271

which type of material is used to transformer laminated core?

6 13685

What is fault level?How it is calculated and how it is Expressed?

2 5069

IF % IMPEDANCE OF A TRANSFORMER IS INCREASED FROM 5.8% TO 8% HOW MUCH THE EFFICIENCY OF THE TRANSFORMER WILL COME DOWN?

ABB,

2374

What are the special protection given for high capacity Motor, more then 10mw

2 4325

What happens if a +vely charged particle is placed in the centre of a room and assume that the north side wall is having magnetised with north polarity and south side wall is magnetised with south polarity. In which direction the particle will move

BSNL,

5 8003

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Un-Answered Questions { Electrical Engineering }

how can maintaince the acb contactor moveing and fixing kit

2078

How to size Air Circuit breaker (ACB)? What is the most important factors?

2260

A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.

1920

What are the types of instrument transformer?

1173

How will be the single line diagram of series trip HT breaker? how it works?

2605

A 100KVA SINGLE PHASE TRANSFORMER 10000/200V,50HZ REQUIRES 300V AT HV SIDE TO CIRCULATE FULL LOAD CURRENT WITH LV SHORT CIRCUITED.THE INTAKE IS 1000W.THE % OF REGULATION ON FULL LOAD AT 0.8 PF LAGGING WILL BE HOW MUCH AND THE SECONDARY TERMINAL VOLTAGE ON 0.8 PF LEADING WILL BE

2585

what is current check gurd relay?

2598

Why we are use dol starter up to 10 hp

1374

WHAT IS IM (INDEX OF MOUNTING )IN MOTORS

2038

is ac supply can store

2103

According to underground cables a) stress b/w sheath & conductor is high b) inrush of core & conductor

1974

What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

1995

. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?

2156

Why we find the sensitivity for the CT's to check?

1864

How to calculate the sag of OPGW during stringing???

2584

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