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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How stabilizer works??

1166

what are the disadvantages in GIS over AIS

Tata Steel Limited,

1470

How could I get a certificate of competency as Electrical Supervisor? I have completed By BTech in Electrical this year(2012) for VJTI Mumbai Maharashtra. Is it compulsory to be produced while joining?

ONGC,

2587

why the manufacturer provide M and C terminals ? why they will not internally short them ?

1 2127

how to get electrical supervisour certificate in gujarat

1094

When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

TATA,

1242

What is the difference between Contactor and Circuit breaker ?

8 6894

how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

1093

what is demagnetising effect & crossmagnetising effect and how it is related to electrical system?is there any more effects are available or only these two??

Telco,

1 28019

why the rotor current becomes in steady state during high slip region? please verify with equations.

1159

I am getting diesel genset 62 kv for my house In addition there are 6 meters of 11kv for the house Lift also being installed for house plot sise 200sq yds total 4 + 2 foloors I want to know how much earthing required how deep it should be

2 3077

why in india the voltage generate multiply by 11,,,like 220v,440v,11kv,33kv,66kv,220kv,

NTPC, Servotech, Tata Power,

3 8896

how to select energy meter? have any calculation?

1905

why the Parameters : Base Voltage & Maximum Voltage can't be equal in value in a VFD (Variable Frequency Drive) ? How much the base voltage would be lower than the maximum voltage ? If 400 V is the 3 phase output of a VFD ... then what should be the base voltage ? thanks a lot

Yaskawa,

1 2403

Do inductive loads have distorted current waveforms ?

961


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Un-Answered Questions { Electrical Engineering }

How much of the total hydro power potential has been exploited so far in india?

180


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.

2331


sir, i am 3 years diploma course pass out candidate.what type of certificate can i got in marine service.

1006


What is a differential amplifier?

191


Difference between Lugs and Thimbles

8468






How to size fuse? How to size MCB?

571


What is the formuala to calculate the rating of motor protection circuit breaker

1249


How many types of oil using in H/T & L/T Oil Circuit Breakers. need Explenation ?

1874


how can i improve the power factor in domestic (230v)

1088


how to select size of hardware for linking aluminium busbar is it depend on area of busbar or current flowing through bus bar

1105


working of diesel generator ?

891


Why two phase welding machine is used instead of three phase welding machine.

879


Dear all i am kumaravel. now in chennai. my work is control and relay panel auto cad designing.up to 11kv to 400kv then question is i am improving my knowledge. i want some books name and auther are available for this C&R panel related. plese any one help me

987


what is different between relay and plc?

2986


what is the clear formula to calculate cable size for a load

1015