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Electrical Engineering Interview Questions
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hi can you give any body fault level calculation, generator fault level calculation,transformer fault level calculation for system fault level with equation? i have 3.3kv generation voltage three gas gen sets, one is 1.9MW,2nd is 2.5MW,& 3rd is 3.8MW & i have 11 kv generation voltage one gas gen sets is 3.8MW, we are step up to 22kv by transformer

5482

How delta connection in the primary of distribution transformer reduces harmonics?how delta connections reduces harmonics?Please answer me...Hope that question is correct.

1249

why dc exicitaion used in ac motor....?

3455

what should be the no load current for 3 phase ac motors ranging from 5 kw to 1000kw?

960

what type questions asked in hp cl

HPCL,

1014

how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???

991

Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

4966

What is the minimum insulation value required for a cable between phase to phase and phase to earth of 380 Vac 50Hz circuit, having load arround 800 amps.

DEWA, TATA,

4997

what is the maximum current carrying capacity of a 95 sqmm cupper under ground cable laid partialy in land and partialy in ground?

4964

when we megger is not damaged when we are measuring very low resistance? high d.c. voltage is produced in megger so according to i=V/R. current will be high so what is the reason ?

2460

where induction generator is used ?

2875

SIR I AM GOING TO TAKE PART IN JINDAL ENTRANCE XAME OF 4TH OCT. PLEASE SEND ME SAMPLE QUESTIONS FOR THAT ON MY ID JITENDRA1603@GMAIL.COM

2484

what is meant by vector group of a transformer? How can it be derived?

1065

when the direction of a 3phase induction motor is reversed , is there any losses increases?

IOCL,

6401

a 3 phase slip ring induction motor is wound for 4 poles on stator and 6 poles on rotor; when 3 phase balanced voltage source at 50 hz is applied to motor it will run at a)1500rpm b)1000rpm c)750 rpm d)zero rpm

13529

Un-Answered Questions { Electrical Engineering }

we are having 15kw and 3kw motor both can run in same time , instead of using copper we are using ug aluminium cable , 35 sq.mm is suitable for its current carrying capacity..?

887

How Self works in DG set

906

what is the isolation transformer. what is the isolator?

1163

what is the string efficiency

3784

How many lightning arrestors to be installed on 50MX60MX10M building and is there any formular for that?

1018

The windings of a transformer are divided into several coils, because?

272

I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

1246

How to find ampere on ht side for selection of cable size ???

892

What is the formula to calculate a three phase alternator

1341

what is effect of leading power facter on the system and billing

1323

at what basis/standard we have to arrive the current density of aluminium/ copper in busbar?

1107

testing of Vector Group – YNaoD II

1892

what things to be considered when designing UPS

835

Convert a star connected network into a delta connected network.

233

what are the interview question asked in wind mill about electrical

1487