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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What happens when generator is running with leading power factor on it say -0.96. what are the effects of it on alternator and the other generators operating in parallel to it.

2 4716

what is the exact meaning of power

SKB,

1 1852

why choke is provided in the centre of the tube light?

3 4289

I want to give Power supply to a house from the Feeder, Total Load of the House is 128 KW, how to calculate cable size for this load ?

5 8555

what are the problems that generally occur in power flows??

1 2268

what is the principle of generator , induction motor,d.c motor

1 2951

WHAT IS FORMULA TO KNOW TO BACKUP TIME OF POWER PLANT 48V/50AMP DELTA POWER PLANT

1 2630

how can we design robots

Maruti Suzuki,

1290

what is the maximum demand how it is defined

1 2735

what is the preventing maintenance of transformer

1 3545

what is polarity in ac system? and how do identified?

1 1620

for same rating of a transformer and induction motor which one will have higher magnetising current flowing?

2 3150

TYPES OF TEMPERING OF ENERGY METER

1 5425

DIFFERENC BETWEEN VOLTAGE AND CURRENT

Wipro,

1 3791

WHY SEPARATELY EXCITED MACHINE NEEDS EXCITATION BY DC SUPPLY WHY NOT BY AC

1289


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Un-Answered Questions { Electrical Engineering }

What is the difference between rulling span and wind span of of an Over Head Transmission Line?

1632


My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1285


what is the min and max ohmic resistance for the earthing rod installed for lighting poles for street light network

2726


How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?

1605


how generator load test is conducted?what are the steps?

965






how to meas-our losses for L.T & H.T

1512


How do we calculate the maximum amount of current in a 300 SQ.MM cable ?

1430


How many devices can be connected in one zone of FACP

1617


Single line diagrams for star to delta and DOL starters.

1624


The slip during plugging operation is given by= A 1-s B 2+s C 1+s D 2-s

2182


How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance

1304


How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

1317


what is the current density of copper & alluminium.

1339


What is the universal motor?

479


explain the process of commutation in a dc machine. Explain what are inter-poles and why they are required in a dc machine.

486