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 158095

how to calculate the loss tangent of electrical cables

729

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

724




why are use star delta startor.

4 14055

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

IBM,

11 27922

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 3055

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 14079

How to select Main CB Rating for 187 KW Load?

6 6228




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

832

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

HCL,

7 19759

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

Voltas, Carrier,

11 81417

what is efficient load of transformer in percentage

4 3335

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

5 5146

Explain the working principle of Synchronous Generator and Assynchronous generator?

826

How many Cylinders are there in Diesel Generator?

4 3169


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Un-Answered Questions { Electrical Engineering }

1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

1923


why in the three pin plug all 3 pins are cutted ?

660


explain the functions of main isolation switches

370


how to decide choke rating for drive?

1004


What are the different power system losses and how can it be eliminated?

788






how do i work out the Amps of a incommer if i am running 1 37 KW motor and a 0,75 KW motor and some solinoids

633


How are load losses and no-load losses measured at site in a DG set?

540


What is an alternator impedance value?

1644


what causes contact chatter when there is no demand on the air conditioning unit?

636


what happens when series resonance occurs?

568


wat is the first thing dat is needed, 2 lay a cable in some area??

609


EXPLAIN THE WORKING OF SERIES REACTOR IN HT CAPACITOR BANKS (FOR VOLTAGES & CURRENTS)

5861


In DC generator, we use commutator, having no. of segments. Then how it is possible to get a half wave of voltage and current for half rotation of armature?

725


How eddy current generation support the idea of train braking?

617


What is the meaning of Insulation H for transformers????

905