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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

The formular of how to calculate a cross sectional cable to feed an electric motor. Examle: 15KW, 26.1A, 415V. Calculate the cable size in mm2

Sona,

3 7789

Can you explain the phase displacement between primary and secondary of power transformer of any vector group(for ex)?

1 3165

I have two power supply.a)govt. power b)Captive power.3 phase load connected inside factory.when source change govt. source to captive some motor rotate reverse. Is phase sequence changes when if off & on?If I off generator & on it again is it possible to get changed phase sequence??

ABB,

4 6526

what is the relationship between current and frequency in AC circuit?

3 40274

if i have one capacitor=80 micro farad which correct the unity power factor,but i want to make capacitor bank who correct the power factor.so,how to split this capacitance value?

2 4303

What is function of condenser in fan?

3 8438

WHAT IS RMU AND WHAT IS ITS FUNCTION AND HOW TODISCONNECT

Bhel,

3 8368

WHAT IS REACTIVE POWER?

2 5335

In the diesel generator wihch type of power we can get it ? Like AC / DC

Aditya Birla, Indian Steel, PTPS,

2 5581

in breather of transformer how sillicon gel absorb the moisture?wat happen when the moisture in that oil?

1 4100

why transformer ratings are in kva

4 6439

What are all the points to be checked while decanting diesel from tanker lorry to HSD YARD

Cisco,

1 3778

What are all the points to be checked for a newly re-winded motor before installation

Cisco,

1 4308

sail kaott diploma ece ke interviw me qus.kis parkar ke aate hai aur G.S me kya puchate hai kya sameedyaan me kis parkar ke qu.puchate hai

Sail,

3385

What motor is used in ceiling fans and what motor is used in table fan.? why table fan is costlier than ceiling fan?

Bhel,

6 28519

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Un-Answered Questions { Electrical Engineering }

The inventer is a battery, but if lost current at home u will turn on the fan but the is AC and inventer battery is dc . Then how the fan was rotating. What device Or machine in fan converst the Dc power to Ac power

1106

How does an oscillator differ from an amplifier?

1114

Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

2084

What are the disadvantages of hydropower?

1166

Differentiate between kirchhoff’s first law and kirchhoff’s second law?

1013

Explain about c.t?

1085

what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

2046

What determines the thickness of the lamination or stamping?

1619

What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.

2665

How calculated single phase induction motor req. Capacitor?

1538

A well system is when , no. of bus bar is less or more. Tell me the concept of it.

1880

lorteny method

1953

What are the commonly used schemes for the bus zone protection?

1012

what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?

2213

how pt is using

1907

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