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Electrical Engineering Interview Questions

If we want the fan to consume less electricity at low speed, what do we have to do?

2675

What does βbattery of 180 AMP HOURβ mean to you?

3572

In liquid rotor starter how PH valve should be maintained.

2886

what is the difference between star connected and delta connected motors

3954

does frequency affects the load? if yes elaborate it.

2370

what is the use of permanent magnet generator in exciter

TATA,

1236

What is function of inverter? and who it's operate & what are controlling devices are used?

1421

What is the difference between phase, neutral wire and earth cable. if neutral is connected to ground, y we need earthing cable? what difference in hot and cold wire? do neutral wire carry current?

3621

If we have to find the inductance of a dc shunt motor then by giving dc supply or ac supply and what is the reason for it. (this example is from "to determine the transfer function of a dc shunt motor ")

1102

Based on what the rating of machines are provided??(ANswer should in single word)

11308

how techometer works and how it will be connected above the flywheel in dg system

1762

For 1 KVA load how much KVARH capacitor can be used ?

8907

why ht motors are star connected?

996

we have a lot of model of rectifier but thyristor rectifier is the most rectifier that use in power system. Do you know why this rectifier is used?

959

what is transformar load balancing ?

L&T,

4405

Un-Answered Questions { Electrical Engineering }

in india per day how much power is generated including all power station

955

State theveninβs theorem?

221

WHERE NEUTRAL WIRE IS CONNECTED AT DOMESTIC TO TRANSMISSION LINE(SINGLE PHASE TO THREE PHASE)

920

RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV is ok ,but haw to calculate the KA rating?

945

how i calculate the syncrones generator NGR resistance .if we have a 6mw generator line voltage of generator 11kv also line current 393.3 ampere.

1167

we are going to install a solar PV site and how can we calculate PV Solar Panel Efficiency, can anybody tell me complete method for its calculation.

1152

Why is the air gap between the pole pieces and the armature kept very small?

285

IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM

1151

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139

What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

479

why there using acb enclosure in big buildings

1020

how can we phase identification in a distribution line,how we recognise that which phase is coming for a house hold connection.help me............

1118

While testing a ZCT what parameters have to check or measure?

1439

What is the comparison between 30mA DP RCCB and 100mA DP RCCB and can replace it against 63A MCB

472

From reading, Under voltage relay used also as phase sequence relay now, Why I use under voltage and phase sequence relay in the same circuit (ATS)?

924