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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how squirrel cage & slip ring motor works? how they differ from each other

1 4075

why the earth pin in a 3-pin socket is longer and thickest?

5 5902

which is better 50 HZ supply or 60 HZ supply?

6 8078

Difference between KW & kVA

7 6997

why -48 volts dc used in telecommucation

1517

What will happen if primary of transformer is fed with Square wave instead of sinsoidal wave ?Will it operate or Not?

Areva,

3 14357

i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester

1168

Sir,In our company there are 3 caterpillar make(capacity:(1) 3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make (capacity:11KV,3.8MW)gas engines utilised,all are running in paralell. There are three transformer utilised,(1) 6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence voltage:7.2% used for one generator of 2.5MW & (3) 5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one generator of 2.5MW.all generator breakers capacity of 1250Amps. Sir,I want the details of fault level calculation of generator,transformer individually & for whole system. If you require any information from me.feel free for contact me sir.pl.send the answer of my question as the earliest as possible.

Piramal Healthcare,

1203

Why indicate only 440V to 3-phase supply.

4 6355

whatis mean by voltage?

7 5639

Main Differance between Primary Distribution & Secondary Distribution Of Electricity....?

1 20410

Why is a synchronous motor always star connected??

Bhushan Power Steel,

1643

what is the benift of HT metering & LT metering

1 3157

what is the wattage of 'zero watt' bulb?

PSEB,

16 24839

Megger type of instrument is used to check??

8 6055


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Un-Answered Questions { Electrical Engineering }

1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

1102


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?

1038


need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

876


Explain about Leakage Test.

972


What is a surge supressor why its is used in synchronous generators

1087






oltc of a transformer, how it works? and what are the equipment consist of describe briefly?

1012


Which motor will you choose which can operate in both lagging as well as leading power factors?

193


what is the use of permanent magnet generator in exciter

1193


What do you mean by an instrument transformer?

166


What are the types of the glands and difference between single and double compression type of cable Glands.

1152


what are factors comes under relay setting (distance relay 7sa52) under OPEN DELTA VTs connection??

1618


WHTA IS LIMT OF LEAKGE CURRENT OF 11 KV 1 CORE 1000SQ.MM. XLPE CABLE.LOAD ON CABLE IS AROUND 600AMP .LENGTH 500 MTRS.

1085


how to Select its CORE in electrical cables based on its applications? or Application of various types of electrical cable based on it CORE?

2255


What is force on a conductor in a magnetic field ?

154


What is the Difference between Ac Drives and Dc Drives? According to application, speed, Torque, cost, Reliability, Construction, Motor etc... Thankyou !!!

1207