Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What do you meant by slip power recovery?

PSEB,

1 5667

Give two basic sprrd control scheme of DC shunt motor.

2 3317

What are the advantages & disadvantages of a group electrive drive?

852




What are the advantages of individual drives?

Suzlon, A1 Electricals,

1 1329

What is plugging as applied to an induction motor?

3 23176

Define heating time constant of electric motor.

3 16329

why does chattering take place in ac contactors? can it be avoided & what care does the manufacturer take to eliminate this phenomenon????

10 42172

what will happen if the bus PT fuses are accidently removed from the circuit in 6.6kV feeder?

1 3216




why is it that the HT motors & motors having very low kW rating(<1kW) have windings connected in STAR, whereas the motors having in between kW ratings have DELTA connected windings??

5 6020

which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?

693

How maesure earth neutral value & how much maximum value value required in between earth & neutral.

NEC, Bellsonica,

778

How does ELCB work when exist earth foult? and How does RCCB work when exist earth foult?

1 7210

THE 40 MW OF POWER FOR 220 V III PHASE POWER CONNECTION REQUIRES HOW MANY KVA POWEER REQUIREMENTS

Chartered Accountant,

7 5483

what is intermediate switch

1 1872

In DC generator, we use commutator, having no. of segments. Then how it is possible to get a half wave of voltage and current for half rotation of armature?

726


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Un-Answered Questions { Electrical Engineering }

how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com

1318


What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?

601


How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?

756


In a 3 phase 4-wire system. For a 3.5 core cable if all loads are single phase and balanced, what will be neutral current? will it be sum of all phase currents? Or it will be zero? And if loads are unbalanced what will be neutral current?

395


why to use freewheeling diode ( diode in revers bias mode) across dc coil

2036






full form of flry b

1739


Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

776


What is bridge rectifier and explain with details

684


In diesel generator how AVR get voltage to excitation. And basic diagram DG EXCITATION CIRCUIT.

1894


If I want to lift the water at a height 50m from ground level through two inch(diameter) metal pipe then what is the capacity of motor pump is required? is it possible in single phase supply or not?

681


I am having a 1500 KVA transformer whose secondary current is 2086A and my connected load is 1000 KVA, I am having 400 KVAR APFCR for PF improvement what ratio of CT should i install in LT EB Bus to get optimum PF improvement?

385


how indusrial diesel generator work

637


Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?

464


The power supplied to a 33microF capacitor from a 120V, 60Hz source will be

692


To make a basic instrumentation amplifier, it takes A One op-amp with a certain feedback arrangement B Two op-amp and seven resistors C Three op-amps and seven capacitors D Three op-amps and seven resistors

665