Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to calculate the current carrying capacity of electrical cables

Havells, Polycab, Grasim, HM Cables, Janapriya, Barqaab,

16 160780

how to calculate the loss tangent of electrical cables

769

what is the reactance,capacitance & impedence electrical armoured & unarmored Cables.

757




why are use star delta startor.

4 14257

why AC cannot to be stored and DC cannot be transmitted?

IBM,

11 28404

what happen to the voltage and current in all phases when an earth fault occur in a phase in three phase three wire system(delta connected)...

1 3114

if we know Fault level say 25 KA , How to decide busbar size for Distribution network of 1000 Amp Breaker ? Sample Calculation or Farmula Available or not ?

TCS,

4 14309

How to select Main CB Rating for 187 KW Load?

6 6354




What is the Surge suppresor? Why using in a UDB's and How it works?

869

I have 725KVA DG set how to Calculate the Ratio of KWH? Whatb is the Formila

HCL,

7 20202

How to calculate the CFM to TR? What is the Formula

Voltas, Carrier,

11 83884

what is efficient load of transformer in percentage

4 3415

why we use to transmit the power in three phases intead of single phase ?

5 5229

Explain the working principle of Synchronous Generator and Assynchronous generator?

859

How many Cylinders are there in Diesel Generator?

4 3254


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Un-Answered Questions { Electrical Engineering }

What is the capacitance values of 132,220,400 & 765 kV current transformer

655


What effect does a very low impedance have on the Voltage regulation? On the short-circuit current?

4446


i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle

737


I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

588


how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

857






solor panels arrange some angle,panel is flat fitted energy was produced or not why?

610


please send me previose rrb junior engineer qustion papers

664


What is transformation ratio what it describes?

361


what is the difference between linear choke and suction choke?

1279


what is the control circuit for operating the clean room air shower

882


Which power will flow first if we switch on a motor Active or Reactive? How?

2669


If more than rated DC voltage appears across trip coil of the breaker, what will happen? e.g. in 110V DC circuit system, if voltage across battery terminal showing 121 V

397


What is the important precuations need tocarried out while working with Electrolite in Battery PM?

721


DESCRIBEPNEUMATIC SYSTM OF ASH HANDLING PLANT

3602


DEFINE BREAKING CAPACITY OF BUSBAR & HOW IT IS CALCULATED?

3844