Electrical Engineering Interview Questions
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2. Modify your design in question 1.a so that the circuit works according to the following function table X Y F 0 0 Clear 0 1 No Change 1 0 Parallel Loading 1 1 Count 3. Design a circuit that detects the pattern 010 in a serial input X considering: 3.a Overlapping 3.b No overlapping

1447

how we calculate capacitor bank mvar for 11 kv distribution networ , and i need releation between capacitor bank with voltage, frequency, current, pf

2 8028

I have a 1000 kVA Transformer(11kV/0.415kV) and a APFC panel of 400 kVAR(LT).Now if i want to remove the LT APFC panel and install a HT(11kV) APFC panel on the HT side is the HT APFC panel will work same as the LT APFC panel(improve the power factor),if yes what will be rating of the HT APFC panel?what is the formula to calculate HT APFC panel rating???

2 8526

What is float cum boost charging system?

1573

What is trickle charging system?

Absotherm,

2 4199

AVR

2 4228

all details of DG UPS HVAC

1526

I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)

1445

what is power factor

4 5449

What is actual name of Transformer oil.

6 8201

WHY NOT CONSIDER PROTONS IN ELECTRICITY LIKE ELECTRIC CURRENT?

1 2466

If a generator of generating station produces 100MW rated output then what will be the rating of the step-up transformer connected to it?

5 5009

as we see that in our country the power rating for transmission is always rated in multiple of 11 like 11kv,33kv,66kv132kv. So i want to know wht is reason or logic here.

2 3245

what is lrs tank water resistance.

1 3342

what is lrs tank water resistance.

2066


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Un-Answered Questions { Electrical Engineering }

2. Modify your design in question 1.a so that the circuit works according to the following function table X Y F 0 0 Clear 0 1 No Change 1 0 Parallel Loading 1 1 Count 3. Design a circuit that detects the pattern 010 in a serial input X considering: 3.a Overlapping 3.b No overlapping

1447


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

1577


I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

1368


HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U

1987


1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

1751






How to do fabrication , busbar and wiring cost for : 1. LT Panels 2. C& R Panel

1434


transformer spections :: input voltage 0-110-230v; output volage 0-10-12-14v; amp=3A using CRNO CORE, capcaity=50VA primary turns = ? ; secondry turns =?

1648


state the working of discharge lamp?

1561


What the difference between three phase contactor (coil 110vac) & three phase SSR (control voltage 110Vac)? May I use contactor in place of SSR?

1639


what is tri state logic gate

1608


area control error

1282


The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

1931


What are the electrical engineer roles and responsibilities in chemical plant?

1122


What is the difference between single point and double point bonding. please kindly detail about bonding of cables.

1913


Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?

1727