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Electrical Engineering Interview Questions

Transfer of electric power from primary to secondary in a transformer takes place A electrically B magnetically C electro-magnetically D conductively

4522

Resistance of low voltage side of transformer compared to high voltage side is A less B equal C more D depens on design

2636

As load in a transformer increases, mutual flux linkage in core= A increases B decreases C not change D first increase then decrease

5128

Are we do it in single transformer with dual primary as 11 KV and 33 KV and constant output as 415 Volts?.

1899

which motors is used in mixies

2539

why the AC or DC motor takes high starting current?

2795

In 3 phase induction motor even with low Voltage it reaches nearly it's rated speed why? (for example instead of 400V it reaches with 250V)

2493

electrical ques

1206

77 In constant power region of 3-phase IM torque-speed characteristics, the torque is proportional to A speed B slip C 1/speed D 1/slip

1260

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above

1081

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

1230

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases voltage A does not alter B decreases C increases D none of above

1210

Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm

1197

Stator of 3-phase IM has 3 slots per pole per phase, calculate number of stator pole pairs. A 1 B 6 C 2 D 3

2801

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

1088

Un-Answered Questions { Electrical Engineering }

how to changeover ups in this power failur time?

1027

What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

1089

Explain dc generator with its types?

152

Lt motor sfu flashing reasons?

798

Can we use both Electrical & mechanical interlock between tow breakers? if yes how, please explain

466

How capacitor improves pf

694

what is RFID? thire application;

1060

how can we calculate the ratio of caustic soda and water in lrs.

4380

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588

What are the advantage of free wheeling diode in a full wave rectifier?

169

What type of a DC motor would you use for a lift?

190

Logic using 1 kV or 1,1 kV grade in house wiring Low voltage cable. Explain/suggest? some use 1kV and some prefer 1.1kV grade insulation low voltage cable why??

615

what id a dry type transformers and its function ?

844

which of the following elements is not present in stainless steel

1465

What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.

1313