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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Why earthing transformer used in Distribution Sub-Station?

3 12316

how to calculate the voltage drop in electrical cable while laying cables?

2 5640

when ur using single phase type of load for a 3.5core power cable .Why neutral is .5 and how much current in the neutral if we consider neutral as a reverse path for three phases.

2 5641

what is the working principle of dc motor & its application ?

3 7843

what is the difference between brush & brushless dc motor explain its operation ?

1 5661

What is partial discharge in power cable?

1 3280

why rating of motor in HP ?

2 5785

following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

2066

Is it possible to download the Siemens Selection Chart(TYPE 2 coordination) for 1) fuseless selection 2)Fuse selection

8239

how to calculate cooling requirement of datacentre from electrical load?

2416

Is any generator is developed which is operated with out diesal or other expensive source?

2113

In a house wiring why we are using only one neutral wire and so many phase wires from the main board, when the load is common for both wires?

3 17065

plz tell me Motor IP formula

2004

plz tell me about detailof induction motor Slip

2 4976

plz tell me about BACK emf and how it generates?

2 5556

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Un-Answered Questions { Electrical Engineering }

what is residuel magnetism. and how order lead acid batteries for 24 volt. emergency lighting system.

1989

how i can calculate the size for fire cable

2023

what is the range of maximum DOL and SDS can be use for pump and fan application

1118

wht is embedded systems? what is new inthis field?

2010

how to select battery for 15 KVA UPS with formula

2551

if any house we instaled a 1.5 ton ac and its phase cable of wiring is installed but netrual cable of wiring not instaed. my question is that is neutual of house(for other wiring is capable for ac load or a sepeart neutrual wiring required

2479

I want to know the 'Test voltage' for Tandelta testing of 3.3 / 6.6 / 11 KV Motors. Please explain

2268

The metal-enclosed switchgear and controlgear is subdivided into three types: 1. metal-clad switchgear and controlgear; 2. compartmented switchgear and controlgear 3. cubicle switchgear and controlgear. What is the main differnence between them. State some example.

1984

errection check list for transformer maintenance

2609

Usage of flywheel diode in relays

1931

I Just want do EHS Certified Certification Distance Course From Govt approved,so can any body provide me details.

2139

There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2

1895

how to select the isolation tranformer for siemens 802dsl cnotroller

2069

-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.

2104

What are the advantages and disadvantages of negative feed back?

1154

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