Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to synchoronize the generator (with gcb,GT) to grid????? ????? from Grid iam getting power (rated 400kv/20kv) through GT and its goes to UAT.,,ST.,, now my generator(rated 20kv ) ready.,, now iam closing my GCB.,, in GT iam suddenly giving 20kv on that Gt.,, what will happend

1614

what is the response time of relays when a FAULT OCCURS IN A POWER SYSTEM?

2 4153

What is the role of power pack in substation protection system?

Facor,

2221

why there is a high voltage line in multiplication of 11?i.e.- -66kv,11,kv,22kv

Bhel,

4 7961

how capacitor pass ac voltage practically?with increase frequency and cpacitance?

DELL,

1 3902

What is battery Amphere-hour? How the battery back up time period is calculated?

2 11260

What is Difference Between static & Dynamic Pressure of Fan & Blowers

2 10246

WHY IS THE NO LOAD CURRENT SMALL FOR A TRANSFORMER COMPARED TO OTHER ROTATING ELECTRICAL MACHINES??

1 3641

Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

2 3530

What is the real function of reverse power relay in generator panel while syncronising?

Triveni,

1594

What is the Minimum winding resistance of motors ( small & big)? referance range

TATA,

1836

What is core CT & it's function?

1618

A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1510

A 6.6 KV/ 440V Xformer. what are the imporatant parts & equipment required for it's protection panel.

APTransco,

1831

what are the main Parts of VCB

1 4504


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Un-Answered Questions { Electrical Engineering }

We have 5 Distribution sections with variable loads&We have 3 Gensets(500kva,380kva&250kva) our total load is between 400kva to 600kva. so how could we connect 3gensets.

1407


what is the purpose that we use PLC system in power system

4171


How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?

1744


Write a note on Treatment for electric shock.

1407


How can we calculate ac current from the given DC current when AC voltage is given?

1522






What are the types of piano switches?

1429


we have consol make 3 phase servo stabilizer for cnc m/c. while installing the earth neutral voltage is 1.7 volts at stbilizer off condition and when stabilizer get on en voltage reaches 4.8 volts (new earthing is done and neutral is helthy condition all phase to neutral volts 440,442,441 v)why this happen.solution for cause.

5542


What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?

1979


What are motor generator sets and explain the different ways the motor generator set can be used ?

700


fuel-air ratio in a petrol engine fitted with suction carburettor,operating with dirty air filter as compared to clean filter will be

608


i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.

1405


Can anyone tell the proper diagram of star delta starter????

1459


What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

891


Define piezo-electric effect?

693


How to perform a DC resistance test In Alternator and their proceduces?

1062