Electrical Engineering Interview Questions

What is center gravity load in substation?

1988

why transformer neutral and CT Secondary neutral is connected to earth?

NCC,

3683

What is the main difference between generator and alternator

3657

How to calculate current carrying capacity of copper conductor _ such as cable size 25sq mm,50 sq mm, 75 sq mm, 100 sq mm

3455

What is the difference between diesel generator engine with and without turbo charger with the same capacity?

1236

what is PDU in transformer?? which company manufacture??

1419

a 440v 60hz 03 phase 100kw generator can deliver how much power in kw for 220v 60hz 01 phase load?

1807

can we use the 110 v primary Tr 240 v secondary step up Transformer as reverse 240 pri 110 sec

3329

Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir

1471

how ups works ? various parts of ups and working principle

1514

Explain Power factor in simple words

ETO,

3572

Describe Non I.S. Earth System and why is it used?

KPJV,

1335

Why lose 1 phase voltage in 33kv to 415v stepdown transformer

1376

why wire sizes are 3/29 or 7/29 and why not wire sizes are 2/29 or 6/29?

4704

why generation voltages are 6.6kv or 11kv and why not some one give that stander that generation voltages are 5kv or 12kv?

AES,

3304

Un-Answered Questions { Electrical Engineering }

how to calculate kvar in Akiva

1515

A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?

1557

What is mean by spike arrester(Voltage Operated)

1660

Explain the fundamental difference between emf (electro motive force) and pd (potential difference) ?

680

What is the basis for selecting Vk/2 or Vk/4 for REF and Differential protection of Transformer and What is the significance of magnetising current

1963

hi, in the event earth grounding is not available in a project, is there any other way to make the elcb work? fyi, i have an instant water heater (6.5kw) installed, however if there is grounding in the heating element inside the heater assembly, i will get grounded. thank you in advance to those who will answer my question.

1566

hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?

1509

Explain (in simple ) - root mean square. whats its role in electrical fundamandal.where its used

1858

determine two methods to find loose connection in operational electrical system?

1277

I am apply the AAI. So i want electrical sample question paper in technical with answer my id is vijayjobsmart@gmail.com

2249

If any HVDC line is going with positive & negative(the negative usually have return path of current with earthing electrode). Now the question is if this HVDC earthed electrode which is using as return path and earthed any nearby 400kv or 220kv AC substation equipments. which will be the impact of this on AC substation & its equipment, how severe may be this and what should be the minimum distance require between HVDC earthed electrode and AC substation equipments? It's really an high engineering level question...Dare to answer and increase your knowledge.

1514

What is the basic rule for block diagram reduction technique?

800

how can we select the appropriate VCB ?

1875

What is the function of Governor in Hydro Power Station? What is the Function of Lightning Arrestor Voltage Transformer (LAVT)?

2413

what is a reactive power? what is the relation with power factor?

1685