Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

who is make controlling in the reactive power that genarted in AS genrator(the exitaion currnt or exitation voltge)

2 4288

do you have some of interview Questions in power and genrator section in general whith answers

2186

why we are using the ac supply in domestic purpose, why don't use dc supply.

5 8220

transform oil how going to act like ainsulation purpose

Siemens,

1 4190

What is principal to reduce earth leakage current with isolation transformer? When isolation transformer is installed in input stage of system, earth leakage current is reduced. the reason is why the leakage current of 2nd stage of isolation transformer does not affect the 1st stage's leakage current. I would like to know the reason. As you know, earth leakage current is a kind of AC. So, How to reduce earth leakage current in case that isolation transformer is used?

2 10469

what is difference of electrical and electronics

SSIL,

6 7648

why we are using the ac supply in domestic purpose why don't use dc supply

Airtel, SSIL,

6 16783

we are operationing 3NOs 800 Kva generators by singronyus.specialey evening time our panel trip. the panel showing generator earth fault

RRB,

4 7535

star delta starter single line digram

1 6730

in transfomer which type of oil is use!

Essar,

9 11578

What are the protections required in the main lt panel which is connected to the transformer.

Ispat,

1 3085

what is the difference between ac drives and dc drives?

1 3979

Why is DC use instead of AC for protection and control circuits?

4 8972

What is the difference between Earth and Neutral?

2 5590

why there is a humming noise in transformer

6 9071

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Un-Answered Questions { Electrical Engineering }

what is the calculation formula for motor starting torque,running torque, running torque.

1693

Why use the vcb at high transmission system ? Why can’t use acb?

1321

How does PLC work for sychronising of Two or more DG sets?

2076

what do you mean by every IC 74 first digit.why are you using this no.why not using another no.

1899

If I want to connect a capacitor bank on the HT side of a 11kV/415V, 3 phase delta-star distribution transformer to supply Reactive power to it..what practical specifications of a Capacitor bank that can i've??please reply..

2497

what is POTT and PUTT explain?

3345

Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not

1640

HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

2050

What is systematic error?

1370

3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.

2657

What is the Surge for 1.1 Phase Induction Motor(For Eg.1Hp) 2.3 Phase Induction Motor(For Eg.1Hp) 3.AirConditioner(For Eg 1Ton) 4.Refrigerator(For Eg 180Ltr or 160kW) 5.Induction Cooker 4. Ceiling Fan

2055

Define coil span?

1073

What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?

2276

checking procedure of capacitor based motors.used in fans etc?

2120

What will happened if the neutral of secondary of Xformer ( Star point) Note it's above KVA rated Xformer

1889

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