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DRDO Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Two electronic energy meters are connected to seperate phase wires, but connected to a looped neutral. Are these going to function correctly?

8 8431

why we use star connection on the primary side of a transformer?

5 13272

Questions :- HR- Q.1 about yourself & family background ? Q.2 Why u choose Power sector as ur carrier starting not any other sector ?? Q. 3 What think abt NTPC ? Techincal Questions:- Q.1 about Vocational Training……What u did , see the main equipments….etc Q.2 Why a transformer Noise during its running condition ? Q.3 about transformer oil material & Test name for the measurement of its dielectric strength & wht will u do if its dielectric strength goes low ? ……..some discussion type ? Q.4 What is relation between transmission lines & Communication lines ? Q.5 Which Machine u will prefer to use at a place where flammable gases are coming out & why ? Q.6 how fault in an electric system is detected & hw protection of equipments is done ? Q.7 Why we didn’t feel electric shock in an electric train ?? Q.8 Anything u want to ask from us ??

44 27099

What happens if a three phase induction motor is suddenly single-phased while running? Which type of winding connection will be affected?

22 57447

campared to ac, in dc corona loss is

4 7577

Describe the control mechanism of missile launcher???


what is the difference between thyristors and capacitors

2 7016

two bolbs of 100w and 40w respectively connected in series across a 230v supply.which bolb will glow bright and why?

16 53133

A separately excited dc motor having 2 ohm armature resistsance draws a current of 10A and torque developed is 20 Nm under rated field condtion. the speed of the motor under the rated field condtion , when it is connected to a 100V DC source and delivering 10Nm torque....

2 3200


2 3120

if u give d.c. supply to transformer primary then what happen.&why??????????????

4 6370

In simply words(not explain any formula )what do you mean by power factor.?

5 4546

What is the minimum load that you can keep in a 3 Phase 40 KVA Diesel Generator? Is it neccessary to load all the 3 phases? Can a phase be left without load?

2 3979

What is the difference between voltage and emf ?

3 4658

What is complex power?

1 2032

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