Electrical Engineering Interview Questions

how will i find Transformer rating if supply voltage is 11k.v and how will i find incomer if transformer rating is 12MVA

4754

Sir, I need a power supply at 380V. The supply I get in three phase is rated 415V. The total supply I have from the supply company is 70KW. Kindly inform if it is better to use a voltage stabiliser for this purpose or a transformer

5319

from where the self excitrd induction generator get the power?why is the voltage regulation is poor of seig?

1768

why bulbs when connected in series glow dim

10224

How we can change the direction of rotation of Induction motor? Prove it using graphical

1671

What happens with squirrel induction machines if the ends of rotor conductors are kept open? Explain

4808

How we can change the direction of rotation of Induction motor? Prove it using graphical methods.

4377

if we increase the frequency given to a transformer then wat will happen to the transformer size, whether it will increase?

7805

How calculate the Transformer Impedence With Example

6034

How can we reduce the reactive power consumption of your 12.5 MVA power transformer.

7125

what is motor

7385

How to decrease or increase the range of voltmeter? can an ammeter be used to measure voltage? can a wattmeter used as voltmeter and ammeter?

23236

When batteries are connected in series the voltage increases but the current remains unchanged, how can this be? When you consider ohm's law. i.e. If voltage increases, current increases, providing resistance remains the same.

10601

What makes the difference between 50Hz supply and 60Hz supply which one is economical and how can you support your answer...........?

7049

Witch do depand of Power factor and theory of power factor?

1696

Un-Answered Questions { Electrical Engineering }

3 phase induction motor connection star or delta while using ac drive motor is .75 to 5.5 kw

1568

What will happen if we introduce negative feedback to a control system that uses a positive feedback?

721

What is value of earth resistance required for substation and equipment earthing and what are the reference guidelines

1325

how to compute kAIC?  with formulas...

3755

whate is the meaning of balance/unbalance,in stabilizers type

1704

Hi, Next week Iam appearing RRB exam for section engineer. So help me to get modal question papers for this position. Iam very thankful to you. Whether question will be fully techanical format or general form. Please give me a details regarding this exam.

1507

1.how many earth pits are required for 1000 k.w plant include substion , transformer ? 2. how many earth pits are required for 500kva generator.what is formula to calcute?

2357

i m in need of current rating chart of heavy duty pvc/xlpe, cu/al cables. can somebody provide me? if yes, plz send me at ashish_patel111@yahoo.com

1571

Why 1/3 is used in symmetrical components?

1437

How wire size can define in electrical wiring? What is the ratio?

1846

what is negative and zero impedance in 3 phase induction motor ??

1531

How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.

1387

with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....

1537

I am going to appear RRB Sr. Section Engineer Exam, Electrical. Can you send me previous year questions of RRB Electrical engineer. specially Section Engineer questions. my email id is likerahulworld@gmail.com

1413

How does the slip regulator works as a startor

1541