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Electrical Engineering Interview Questions
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Why we use ups battery and dsdb battery in thermal power plant

MDeC,

1819

I had finished D.E.E.E at 2004,I wish to take C license.I am working pvt company HT supply but my professional certificate was missing.I have diploma & course completed certificate.without professinel may I got c license?.pls guide me.

OEG,

1 2915

difference between converter and invertor

 2 4800

Can I use star delta connected induction motor for dual supply voltage?

 1705

What is the physical significant of power factor?

Cooper,

1662

what is the significant for using two types of voltage(line voltage & phase voltage)

NTPC,

1 3246

How to calculate the cross section area for a 350 m cable, motor power is 26 kw???

Orient,

1 4492

what happens when a dc shunt motor fed with an alternating suppy ?

 1 3611

What is the formula to calculate distribution transformer De-rating on iron losses basis

IESCO,

1557

Dear All, Can anybody please tell me which value(saturated or unsaturated) of sub-transient reactance(Xd") we take for the calculation of fault current of the system?

 2 5828

Petroleum jelly is applied to the terminals of the lead acid battery is to prevent?

KSEB,

2 6505

In a Capacitor the electric charge is stored in:

TELK Transformers And Electricals Kerala Limited,

2 4651

Rated moter voltage and frequency is 380volt 60 hz but moter is running at 380votac 50hz is this harmful for moter winding

Infosys,

1 5464

what happen if the battery is charged by more than one source ,for ex: connecting data cable to laptop & charger pin to source supply ? 

 2 4085

When testing an earthing connection, we use a 60 or 100 candle bulb with a phase connected direct from supply and the other wire to the new earthing provided.If the bulb glows then the earth is ok.Else earth connection is not Ok. So, why dont we can use all the home appliances taking a single wire from the phase and the return connection to Earth instead of return connection to neutral?

 2 3986

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Un-Answered Questions { Electrical Engineering }

What is different type of Electrical curve and how it protects the equipment's while up-normal situation?

1585

what is RFCT and Insulgard Relay & It's function?

1911

Swg formulae

1738

Difference between low impedance and high impedance Restricted Earth Fault

2837

ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]

2088

What will be result if we connect LT votage to the terminal of HT motor?

1900

all details of DG UPS HVAC

1745

Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

1743

critically criticize the application of ring main unit in power system

1206

how do we calculate length of starting time and repeated starting of a direct online starter?

1742

What is the mechanism of WTI

1533

when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

2166

Discuss about gear cutting machines.

968

suri transmission

4474

1.what is the difference between transformer differential and busbar differential.2)why we are using 2 slope for trafo diif and 1 slope for busbar diff.3)what is the purpose of metrosil and stabilizing resistor in high impedance relay circuit.4)how metrosil reduce the peak volage.5)what is the funtion of stabilizing resistor

4499

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