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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

On what principle reluctance motors work?

1 4079

What is the difference between magnetic loading and electric loading of a machine?

2 36765

How the size of electic machine vary with the sped? Between slow and fast running machines of equal ratings, which one is more economical to design?

1 3588

what is the relation between frequency and inductive reactance in a d.c supply?

L&T,

2 7143

Why machines are avoided to work is saturation region of B- H curve?

3 6072

Why different values of B’s (magnetic flux density) are chosen for DC machines and Induction Motors?

1 3347

How the output,losses and temperature of machines varies with linear dimension?

1 5033

Why air gap in rotating machines should be small?

3 8009

Why rotating machines are not allowed to run near critical speed region?

2 6737

From stability point of view,What(higher/lower) should be the value of inertia constant of rotating machines?

1 3894

how to reduce humming noise in transformer?

3 10416

There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 6891

Why oil preferred over the air as a cooling medium for high rated transformer?

1 4460

What is emperical relation.Name few of them which are used in electriacl engineering?

1 4262

In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem

1 2025

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Un-Answered Questions { Electrical Engineering }

I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?

3868

sir pls send the je exam - 2008 and other model question papers..

2134

can you send me the placement papers of electrical engg. from companis like NTPC,DRDO,IOCL,HPCL,BPCL etc.?If,plz send as soon as possible.Thanks.

2207

I need bhel electrical test pattern & paper

1912

Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason

1991

Define the overload capacity of the motor?

2125

I want single line diagram for AMF & DG syncronizing panel

7263

what will happen if synchronous machine rotor fed from single phase ac supply

1806

what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.

3852

Why neutral point is consider as zero potential?

2726

Draw the circuit of clapp oscillator?

1207

i want bhel placement paper for electrical if anybody having pl send to my id kavitha867@myway.com immediately

2046

how to avoid electrical shock how capacitor store charges wat are the speed control of induction motors state faradays law flemings left hand rule what is rotary converter wat is transmission and distribution what are the sources of energy abrevation of acb,vcb,sf6,igbt what is output equation of transformer which test copper iron and iron loss are calculated what is eddy current draw a single line diagram (10 marks) draw direct online starter(10 marks)

2043

hello!my name is sheikh iam preparing for indian engineering servieces,please send me the old question papers..to sheikhshaazforjobs@gmail.com

2150

why lightning arrestor are made in two stack of insulator but why not cvt

2131

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