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Electrical Engineering Interview Questions

What is meant rectifiers..

MTS,

2436

how does we calculate the capacity of battery

MTS,

2717

what is meant by boost charge in batteries

MTS,

3895

how can we charged the battery in DG

MTS,

3151

what is the purpose that we use PLC system in power system

Glatt, MTS,

3296

Is Transol transformer oil comparable to nynas nytro libra?

2084

For a 50MVA (138/69/13.8 KV) transformer, what would be the maximum demand in order not to exceed 80% of its operating capacity.

3376

i want to make an elec generater with only 12v car battery car alternater and 12 volt motor ..... will the battery charge and give power at same time with out over charging the battery?

2014

What is the difference between Ac curent & DC current

4358

we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?

906

How Kneepoint voltage of CT practically related when CT in service. ie Knp is above 670 what exactly means

ABC,

1030

difference between servo motor and synchronous motor

1413

Why frequency fix in 50 Hz?

4725

Why transformer called by KVA?

7931

What is the difference between harmored cabled and unharmored cables

2115

Un-Answered Questions { Electrical Engineering }

Alternator rotor earth fault relay circuit

1060

Explain about retrofitting of machine tool.

984

Which are resistive loads & which one are inductive loads : Refrigerator, Split air conditioner, ceiling fans, well pump, fluoresecent bulbs, T.V, CRT Monitors, Adsl Routers, C.P.U, Printers, Deep Freezers, Speakers, DVD Players, Microwave oven etc. ? Output Power for these Appliances Would be same like this : P = V * A * P.F Or would be changed ? thanks

2591

can any one know is sbi interview based on merit or based on roll number

998

Why do we need interlocking in a HT metering or Ring main unit switchgear?

1070

Why phase sequence must be same in any ht motor or generator circuit?if phase sequence doesn't same whatever will be affect on circuit?

1235

do we use neutral grounding for resistive balanced load? if we use what happen?

899

what is motor capacity of 80TR chiller? and also say what is the formula related temperature, motor capacity, TR?

1324

control & auxilary circuits used for circuir breakers

1018

what is the use of permanent magnet generator in exciter

1191

What difference between ref protection and differential protection ?

857

i have 500 amp inductive load of motors ,,,pleas tell me how can i calculate for capacitor bank for improving my power factor to 99 .....calcullations for capacitor bank,,,,

679

Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.

1116

When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

1211

how the B-H loop obtain under the static condition

1194