Electrical Engineering Interview Questions
Questions Answers Views Company eMail

defination of static variable compensator

1 2325

definition of transformer

10 6675

defination of transistor controlled series capacitor

992




KVAR Kilovolt-Ampere-Reactance

2 2010

what is the difference between concentrated winding and Distributed winding in motor?

TCS, BSL, Infosys,

7 36965

what are the energy savings methods that are existing in coal based power plant?

1 1736

we have 1000 litre water tank,it located at 25m hight from ground level,the water level on 10m below from ground level.for fill the tank within 1 hour,how much of motor rating(HP) want to select?

691

What is mean by PID controller? And what is its Long form?

Jindal,

9 22066




In AC Drives How can change & control its output Frequency?

Jindal,

5 4423

What is Difference Between Induction Motor & Servo Motor

Jindal, KTTM, Kirloskar, Toyota, Star Technocrates,

31 76665

why ac supply neutral should earth not in dc (-)

2 2580

110 KW MOTER DOL STATER 240SQ.MM CABLE MOTER AND STARTER DISTANCE IS 110 METER WHAT IS VOTAGE IN MOTER END AND SYSTEM VOTAGE IS 415 V HOW I CAN CALCULTE

2 4539

What is Biased Generator Differential Relay?

2 4686

what is interlocing and what is the purpose of this?

L&T,

4 4173

what should be the minimum rating for using HT Motors?

BSL,

1 3252


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Un-Answered Questions { Electrical Engineering }

Difference between a pilot wire and a normal conductor?

536


Disadventage of cable-gland earthing if any ?

634


what is the difference between neutral and earth

741


How good are you in resolving the commercial issues to Employer's advantage?

1001


how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?

736






What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????

621


how we can calculate chiller required ampear?

740


Explain the different methods used in the choice of rotor slots for reduction of harmonic torques in an induction motor.

587


1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?

1267


i m in need of current rating chart of heavy duty pvc/xlpe, cu/al cables. can somebody provide me? if yes, plz send me at ashish_patel111@yahoo.com

729


What is shunt voltage and u v voltage witch one best

478


TRAFO 1. WHY BREATHER IS USED. 2. WHY OIL GOES DOWN IN CONSERVATOR TANK. 3. WHY WE ARE TAKING OIL SAMPLE TAKING FROM BOTTOM OF TRANSFORMER. 4. HOW TO CHECK IR VALUE OF TRANSFORMER. 5. WHY OLTC HAVING BUCHHOLZ TRIP ONLY; WHY NO ALARM. 6. OFF LOAD TAP CHANGER OPERATION PROCEDURE. 7. TR. SHUTDOWN / ISOLATION PROCEDURE. 8. WHEN THREE TRS. IN PARALLEL, ONE TR. IS NOT SHARING THE LOAD – WHAT IS REASON AND WHAT YOU WILL DO. 9. WHY TR. HAS OLTC IN HV SIDE. 10. WHAT IS % IMPEDANCE. 11. WHY TR. RATING IN MVA. 12. WHAT IS VECTOR GROUP IN TR. 13. CONDITION FOR PARALLEL OPERATION OF TRS. 14. WHAT IS TERTIARY WINDING. WHERE IT WILL BE. 15. IF TR. TRIP ON BUCHHOLZ OR TAP CHANGER RELAY, WHAT YOU WILL DO. 16. DIFFERENCE BETWEEN OIL TEMP. AND WINDING TEMP. PROTECTION 17. HOW WINDING TEMP. IS MEASURED IN CAST RESIN TR. 18. DIFFERENT TYPES OF FAULTS IN TR. Trafo - Page-1 of 2 19. WHAT HAPPENS WHEN TR. CHARGED FROM LV. 20. WHAT WILL YOU DO IF MEGGER READING SHOWS ZERO BETWEEN LV WINDING AND EARTH. 21. CAN WE INTERCHANGE BUCHHOLZ RELAY OF MAIN TANK AND OLTC TANK. 22. IF THE LINE BETWEEN BREATHER AND CONSERVATOR TANK 23. LOCKED, WHAT WILL HAPPEN DURING LOAD CYCLE. 24. WHAT IS THE FUNCTION OF OIL SEAL IN BREATHER. 25. WHAT ARE LOCATIONS FOR BUCHHOLZ RELAY FIXED IN POWER TR. 26. WHAT ARE CHECKS IN POWER TR. DURING MAINTENANCE. 27. WHAT IS IMPORTANT WHEN WE CHECK OLTC OPERATION DURING MAINTENANCE. Trafo - Page 2 of 2

1080


How do u analyse protection fault when vcb tripping on load

377


How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

622


Earth leakage relay basic knowledge principle

887