Electrical Engineering Interview Questions
Questions Answers Views Company eMail

if 400kv line is connected to the load but neutral ii not be connceted then wt ll happen

1 3134

what is gapless metal oxide techniques?

1 2654

why generator is star connected ?

Voltech,

3 17804

I have a 33 KV sub stn with two mother transformers 33/11 KV of capacity 3150 and 1600 KVA respectively. The total connected load 16809 KVA(11/0.433KV).how i calculate the max current & how i decided the CMD.

2 2485

What is the rate of WCT on the Electrical Contracts comprising of DG Sets and Civil Works in Delhi ?

MES Military Engineer Services,

1603

Application wise, where we should use AC motors and where we should DC motors?

Nespak,

1 3261

eddy current losses depends on?(a-max magnetic feild,b-avg magnetic feild,c-on frequency,d-on square of frequency)?

Ecil,

3 4392

For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel

Ecil,

2497

Sparking occur when a load is switched off because the circuit has high – a.) Inductance b.) Capacitance c.) Resistance d.) None

Ecil,

3 11550

how do we calculate cable sq mm size,that if 50 A load

GTL, PowerTech,

2 4271

can we start slipring motor on star delta like we start induction motor ? if yes where will we connect ?

NovaTech,

1474

VCB in closed position during opertion if vaccume break then what will happend? it has any protection ?

1 2802

For Eg a 30 kw motor at full load how much kw it takes And at no load how much KW it will take?

GEPL,

1 2613

For an induction motor wat is the loading/unloading cycle duration or interms of L/UL ratio/ percentage?

GEPL,

1556

At full load wat is the motor p.f And at no load will is the motor p.f?

GEPL,

1692


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Un-Answered Questions { Electrical Engineering }

can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?

863


A 100KVA SINGLE PHASE TRANSFORMER 10000/200V,50HZ REQUIRES 300V AT HV SIDE TO CIRCULATE FULL LOAD CURRENT WITH LV SHORT CIRCUITED.THE INTAKE IS 1000W.THE % OF REGULATION ON FULL LOAD AT 0.8 PF LAGGING WILL BE HOW MUCH AND THE SECONDARY TERMINAL VOLTAGE ON 0.8 PF LEADING WILL BE

2038


Safety of on line ups

1461


what r the checklist while installing 500 kva transformer

1771


Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?

1657






why r we using shell transformer for low voltage

1522


how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

1865


HOW DOES THE ELECTRONIC ENERGY METER WORKS?

1595


what is Fault level? why it is calculated? how will u decide same for our plant?

1535


how is capacitor bank look like

1900


i want wipro vlsi placement pattern please send me

1277


what is different between relay and plc?

3962


Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.

1654


what is the effect of back reactive power on the generator ?

1719


what is difference between isolation and ultra isolation transformer?, what is the method of testing ?

3801