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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why can we use cosine wave instead of sine in ac supply as both have same rms vale and ripple factor

Indcoil Transformers, Power Grid,

2060

what is the need of capacitor in transmission lines?and how it works.

SCCL,

2 4059

What is fault.?

AngloGold Ashanti, MNC,

2 3857

why US countries maintains 110v and 60HZ

 1717

Is current shock due to voltage or current? pls answer

ABB,

2 6215

why are installed water leakage detection system data centers & server rooms

Reliance,

1841

internally connection of photvoltic module

 1445

what is the meaning of 1250 KVA Trasformer

 2 5146

What is the power factor,apparent power,reactive power and formula of power factor.

MNC,

3 4374

Why transformer is rated in kva?

L&T, NDPC,

4 7121

What are steps to be taken while designing of DYN11 distribution transformer to achieve magnetising balance?

 3109

What is difference between potiential,volatge and emf

 1 2831

why do mostly prefer to generate and distribute electricity in 3 phase..not in 4 phase or 5 phase.??

BSBK, IOCL, NTPC,

5 7923

If the kvar rating of capacitor bank is 600 kvar at 525V then what it's rating at 415v.

 2 4864

When we need start the motor by method of star delta which size (KW or HP)motor should must be operate in Star Delta Method,

 3 4038

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Un-Answered Questions { Electrical Engineering }

Why the power factor improvement is so important in industrial loads

1396

what is the main parts of transformer? how it is functioning? pls giv the ans briefly.

1447

Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not

1195

how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 motor

2879

How do i perform grounding of star point of Genset (400V) for making connection with step up transformer of DELTA-DELTA (400V to 20KV) ? while Genset itself has its own neutral and grounding bus bar inside genset breaker box whereas we have another neutral and grounding busbar in synchronizing panel next to genset at maximum distance of 6meter, would someone pls advice if we can only perform neutral grounding in synchronizing panel or should we ground neutral on both places inside genset breaker box and synchronizing panel.

1256




State uses of different types of stsrters with different capacities of motors as below: a. up to 5HP b. above 5hp to 10hp c. above 10hp to 20hp d. above 20hp

1464

WHAT ARE THE CHARACTERISTICS OF AN VOLTAG AMPLIFIER

1591

I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?

1736

define as synchronous generator

1684

explain wiring system

2080

Terminal blocks is used for segregate the connections... There is any principle for terminal block..?

1667

Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

627

Who many reason of ignition fail ?

1467

What is the minimum distance to be maintained in between HT panel and LT panel and Instrument panel as per IEC and NEC standards?

1230

What is the function of electron gun assembly used in crt?

638

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