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Electrical Engineering Interview Questions
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The formular of how to calculate a cross sectional cable to feed an electric motor. Examle: 15KW, 26.1A, 415V. Calculate the cable size in mm2

Sona,

3 6757

Can you explain the phase displacement between primary and secondary of power transformer of any vector group(for ex)?

 1 2579

I have two power supply.a)govt. power b)Captive power.3 phase load connected inside factory.when source change govt. source to captive some motor rotate reverse. Is phase sequence changes when if off & on?If I off generator & on it again is it possible to get changed phase sequence??

ABB,

4 5422

what is the relationship between current and frequency in AC circuit?

 3 38512

if i have one capacitor=80 micro farad which correct the unity power factor,but i want to make capacitor bank who correct the power factor.so,how to split this capacitance value?

 2 3327

What is function of condenser in fan?

 3 7312

WHAT IS RMU AND WHAT IS ITS FUNCTION AND HOW TODISCONNECT

Bhel,

3 7382

WHAT IS REACTIVE POWER?

 2 4143

In the diesel generator wihch type of power we can get it ? Like AC / DC

Aditya Birla, Indian Steel, PTPS,

2 4701

in breather of transformer how sillicon gel absorb the moisture?wat happen when the moisture in that oil?

1 3535

why transformer ratings are in kva

4 5196

What are all the points to be checked while decanting diesel from tanker lorry to HSD YARD

Cisco,

1 2939

What are all the points to be checked for a newly re-winded motor before installation

Cisco,

1 3685

sail kaott diploma ece ke interviw me qus.kis parkar ke aate hai aur G.S me kya puchate hai kya sameedyaan me kis parkar ke qu.puchate hai

Sail,

2952

What motor is used in ceiling fans and what motor is used in table fan.? why table fan is costlier than ceiling fan?

Bhel,

6 26697

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Un-Answered Questions { Electrical Engineering }

why the making current is more than then the breaking current and if its true then its about a controling circuit or breaker power contact points

1649

if grounding is notdone at regular intervals for long distance transmission, will the load connected at distribution end receive voltage during negativehalf cycle of the sine wave?

1582

WHAT IS LOAD CELL

1748

I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

1249

I Need standard operation procedure(SOP)for 500kva Oil type transformer oil filtration & Procedure for IR value checking.

2423




what is the value of combined earthing in general electrical circiut?

1485

What are the basic components of the feedback control system?

647

what is doid

2356

I FINISHED MY B.TECH IN EEE . I AM IN NEED OF A GOOD TRAINING INSTITUTE TO DO COURSES .. CAN ANYONE SUGGEST GOOD CENTRES IN TAMILNADU ,BANGALORE ,OTHER AREAS???????

1464

some basic standard questions on transformer.

1361

The magnitude of sum of two sinusoidal av voltage is equal to 230 volt.the magnitude of each individual voltage is also equal to 230 volt.what must be the phase difference between voltages?

1216

Define rise time.

648

3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?

1452

EXPLAIN THE TRANSFORMER MAINTENANCE?

1843

I am inpecting a 10kVA UPS what tests should i do and should i observe?

1835

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