Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what about the input current fan when regulator regulates to speed low?

1 3109

We have a 1275KVA existing Transformer in a power plant project. Customer want to get it test & confirm whether it is a Dyn1 Transformer or not. Pleae let me know how to test it.

Allied Group,

1 3183

why Transformers power mentioned in KVA?. and why Generators and Motors power mentioned in KW?.

10 11994

What is the actual calculation for transformer short circuit test?.

1986

What is the purpose of Rotor earth fault relay and How to test the Rotor earth fault relay in generators and What is the procedure?.

1 3554

why there is no current in the rotor body althrough the flux linking with it also get changes. why current only flows in windinds not in rotor

Vedanta,

1 4584

why we use condenser in the thermal power plant, althrough the same vapour will be again heated

Bhel,

1674

Why motor is not calculated in kva, whereas transormers are calculated in kva

2 4462

WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).

1 5586

What is the difference between Split ring and slip ring?

8 34804

we specify current in case of feeder but in case of distributor voltage, why?

1385

In case of salient pole alternator when number of poles are 4 or more than 4 it helps the flux wave to be sinusoid as air gap length is increased from center to tip , but if the number of poles are 2 how does the flux wave is sinusoidal?

1531

Why the frequency of a system is changed if the load changes?

5 12299

What is the actual meaning of thermal power efficiency ?

1598

Why grounding is generally done in supply end?

ISRO, OFBL,

1 12506


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Un-Answered Questions { Electrical Engineering }

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

1617


What are Contactors? How they works and what its highest rating?

1553


how to select fuse rating for a 3-phase motor ???

1351


What is mean by STUB protection?

1583


What is meant by load angle of an alternator? Upon what factors does the load angle depend?

2572






An impedance of 100 ohms resistance and an unknown inductance is connected across the capacitor. The resulting impedance is a pure resistance of 500 ohms ifω = 10^5 rad/sec. calculate the values of inductor and capacitor.

734


what maximum range of star & delta in hp or kw ?

1283


What is the difference between circuit breaker and isolator

725


dear all i am kumara now current working in electrical designing of control and relay panel i want learn some substaion design then any book are available. pls mention name and authour

1520


can u give me a brief idea about power line carrier communication ??

1398


What is the phase relationship between the primary and secondary voltages of a transformer?

595


How can I calculate per unit (KWH) fuel (Gas/ Diesel both) consumption 1MW unit?

1645


If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

632


please send the IS strandard for electrical to sakthi_murugan86@yahoo.co.in

1833


What is dynamo?How it works and what is the function of dynamo in a DG.

2095