Electrical Engineering Interview Questions
Questions Answers Views Company eMail

when we decide to use soft starter drive or vfd drive in mcc to operate apump?

1522

What are the components ofan HT panel in a 11kv power station?

Reliance,

2 17831

From what on-site components does the HT panel monitoring the bus-bars in a 11kV system take inputs?

1511

how to set earth fault relay

1 3423

In single phase ac ups supply when current is measured with tong tester neutral current is found more than phase current.What is the reason?

1597

WHY R USE IN BRUSH IN THE MOTOR?

L&T,

6 7337

why PT transformer primary r the grounded?

L&T,

2 5403

why r use the wave taper in the substation ?

L&T,

2 4433

I want to know the principle of rotating flux transformer.

1 2881

why dc supply is given for excitation of ac alternator?how dc can produce flux?

5 6364

Where r use in Dc motor in power plant?

2 6973

How to work to the x'mer as a induction motor?

1 3156

how the specific fuel consumption of 320 kva deisel genarator set (explain with formulas please)?

RRB,

2 4970

Is there thumb rule to calculate how many Insulators to be used for Transmission line of different volatges

CS,

3 5247

what is the difference between isolator and circuit breaker

3 8599


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Un-Answered Questions { Electrical Engineering }

for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?

1518


salam&hi, i need to know about how can i calculate an enough current for the new building before i submit it to the suppliers

1601


how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

1313


What is the difference between isolators and electrical circuit breakers?

614


iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

1736






what is maxemo work permit procedure

1670


In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?

702


how withstand of hi-pot test outputs of transformer wire 2.5mm

1493


What is difference is of VSD,VFD,VSDS, are they the same as the direct current to control dc using above mention

987


Why arc quenching is used in Diode ?

1559


How grounding is different than earthings?

709


why we r not earthed Control cable of C.T. terminals

1535


what is the difference between pvc & fiber glass cables

1037


What is highest size of HT motor like 11 kv or 33 kv,and how to make it 750 rpm.i think the size will be very big.any idea ? pl. reply..

1494


What is the dependency of stiffness on load angle??

816