Electrical Engineering Interview Questions

what is power system.........?

1921

why the starting current of a motor is high?

5395

how many types of ACB breakers, describe briefly..?

1786

If a ACB breaker is tripping and closing problem, then what will we check internal..?

5743

WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?

2079

In DC current-excitation to transformer, why it sucks more current? Eventhough there is no power transfer between primary and secondary? R is very low so it should suck less current only na thn y its current increases?

4301

why a fan starts rotating in the reverse direction when condenser gets damaged?

3805

what are earthing material

2707

how to carried out tan delta test in 11 KV alternator ?

2538

how to carried out DAR test in 11 KV Alternator ?

1863

how to can we synchronize different capacity of DG sets.60kva& 250kva?

4027

what is the minimum insulation resistance for HT AND LT motor ?

7203

why leading pf indicates a negative sign???

3802

inductance and capacitance may result in periodic reversals of the direction of energy flow,how???

2600

For two systems transmitting the same amount of real power, the system with the lower power factor will have higher circulating currents due to energy that returns to the source from energy storage in the load.???

Bhel,

1448

Un-Answered Questions { Electrical Engineering }

What are the different losses In a de mac1une'! t.xplam

2281

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1702

delta motor winding resistance I take normally single winding is 2.5, which value is came delta connection ie RY ?

1552

I have 4 busbar of 1000 ampere. we use 4 busbar to make 4000 ampere in one phase.my problem is that when we applied 60% load on that then busbar produced high noise.what is the reason of that and how can i minimize that noise.

1310

What is “pu” in ee?

660

What is sink and source?

708

The synchronous machine excitation system explain

1348

What is meant by turbo alternators?

670

If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.

1006

Electrical 'C' license full abbreviation , and full form

1355

132/66kv sub-station procation ?

1734

7066

best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?

1263

how ct burden,magnetising current,ratio and knee point voltage are related & derived

1780

In a power conditoining unit (inverter) of a solar plant when we measure the d.c. current fed by different strings of solar plates to inverter, the current in the negative wire is less almost by 1 ampere to the current in its positive wire say current in positive wire 5 A , then current in negative wire of the same string is 4 A. Since the current entering should be equal to current leaving then why the current is noticably less in negative wire.

1154