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Electrical Engineering Interview Questions
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WHY THE RATINGS OF TRASNFORMER IS IN KVA?

Jindal,

5 6867

What is main cause of cable's terminal point burned in Lug on high temperature although lug and cable selection is ok as per stantard and also tightness is ok as per situation. so please take in deep and tell correct answer thanku.

 1 7487

How do we calculate the maximum amount of current in a 300 SQ.MM cable ?

Roto Power,

1 2664

If the maximum demand is 120 KVA in a building, then what is the Current taken according to load given ? Formula for it ?

 3 5511

Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

Pride Hotels,

1607

how the frequency was generated in power station

 2 3853

As per which Indian Standard induction motors are manufactured?

 2 3783

Who we calculate the generator NGR resistant, generator voltage 11 KV ?

ABB,

2 4512

if a motor is running at 1500rpm then how you can find its HP

Construction,

1 3824

WHERE NEUTRAL WIRE IS CONNECTED AT DOMESTIC TO TRANSMISSION LINE(SINGLE PHASE TO THREE PHASE)

 1386

i want wipro vlsi placement pattern please send me

 1349

calotropis is an example of the following phyllotaxy

APGenco,

1 6684

Radio Carbon dating is used in a) find diseases b) find the age of relics c) find the carbon content in the atmosphere d) none of these

 2 3428

How to improve insulation resistance of Motor

2 6988

why a single phase motor of same rating takes more amps than the three phase motor? as single phase motor at 230v takes 5amp per HP while 3 p motor takes 2.5amp per hp at 230v.

 1 3986

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Un-Answered Questions { Electrical Engineering }

Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.

1758

which network topology offers the greatest level of tolerance?

1629

how to do the ductor test?

6603

How to Prepare preventive maintenance shedule of machine tool.

1557

Why in metering Ct for ammeters ct secondary side is grounded for each Ct but not in case of CBCT (Core balance current transformer)..kindly some1 highlights the reason..is it because net flux is zero?

999




why impedance relay is used for medium transmission line protection

1856

What is the difference between a Root Locus plot and a Bode plot?

818

What happens to voltage when current through the inductor is constant?

714

What is sink and source?

731

how to select electronic timer(Star-Delta) setting for diff. rating motors

1486

Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason

1401

Explain Circuit Breaker Trip Characteristics in detail.

1711

explain single phase series motor

1504

why we not used 11kva as a direct our electrnics component.

2389

HOW TO CALCULATE THE VT SIZING?

2499

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