Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what effect will 10 milliampere current cause to human body

NPCIL,

1 3621

how to increase senstivity of ct

NPCIL,

1920

is it possible to turn on the single phase star delta on delay timer using 24 v dc ?

L&T,

1463

what is the diff between mcb and vcb

3 4757

what is the main parts of DG? how it is working?

Kirloskar,

3 6348

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

1449

What is the difference between synchronous motor & asynchronous motor

2 3599

are you hear the meaning of burden , excat meaning of burden in only one word

4 4740

how to find the transformer effiiency

Bosch,

3 5765

what curve and rateing would you use for a three phase 0.75kw motor?

1561

why ligthing is not available in switch yards?

1 2950

basic priniciple of induction motor

Electronics, Ramco,

2 3858

WHAT IS ELECTRICAL MAINTAINTENCE ?

1553

In a star to star transformer can we use a common neutral for both star connected primary and secondary

1 3348

In synchronization circuit what is the function of Interposing voltage transformer(IVT)and Reverse voltage transformer(RVT)

ABB,

10958


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Un-Answered Questions { Electrical Engineering }

In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem

1493


How to calculate the phase to phase clearness of HT /// LT bus bar?????

1578


How to design the NGR Resistance

1600


a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

1177


how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?

1668






What are the two types of compensation?

616


reason of diode failure in alternator

1399


what is consequences of neutral and earth connect?

1648


How to measure power in 2 or 4 or n phase circuit? Please give me a formula.

1453


why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?

1584


How do we calculate the resistance per metre of single core aluminium stranded cable 19*3.25mm sheathed in pvc,at 15 deg C temperature?

1934


Can you used moeller lzm1 mccb in a dc system with 125vdc and 20ka short circuit current , beside is it have 24 or 48 volt shunt ? Beside how long current can through from An MCB shunt contacts? (like Z7-AS 24 V)?

1599


What are the different types of dams?

645


What is the simplest formula to calculate the rotor diameter of a synchronous generator?

1900


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

2060