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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

is it possible to run a dc motor on ac supply with good performance.....?

3 3841

how mass curve differs from hydrograph.

1736

Why field resistance is greater than the armature resistance in dc mechine

Cape Peninsula University of Technology,

1 3744

We are using 4 MVA transformer and we provided 2 separate earthing pit for Body and 2 separate earthing pit for neutral, can we connect separate body earthing pit to other earthing pit (Equipment earthing)?

1 2861

what is inverter and converter

Shrishti Power Technologies,

7 6907

what is neutral grounding resistor?

3 4284

Distribution transformer we provided 2 separate earthing pit for Body and 2 separate earthing pit for neutral,we can not connect separate body earthing pit to other earthing pit but we do metal glanding in secondary side cable termination in both side, transformer and PCC panel (LT Panel), is this safe for transformer and other equipment?

1690

what is the cable capacity of any load wise .

2 3598

how to failure indution motor insulation & how to improve heat in motor insulation

BHL, EPIL, IFFCO, Micromax,

1830

What is the criteria that generally follow by distribution licenses to fix contact demand of their industrial customers?

1489

What will be the diameter of pipe between conservation tank and transformer

JLL,

1872

How to power regulated by AVR in Alternator?

EPGL,

3 3939

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

Jaypee,

1858

how to calculate multiplying factor with ct ratio 400/5

KBPL,

1 3069

what is function of centrifugal switch in single phase induction motor..?

3 12871

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Un-Answered Questions { Electrical Engineering }

i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

1939

where the lexical paramater will use in fron end?

1831

what is capacitor voltage transformer?? how it is different from potential transformer?

2144

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?

2263

What is the rating of a circuit breaker needed for 300 kv load in 33KV supply line of 33/415 transformer ? Whether 800/1200 amp vaccum circuit breaker can perform for a 33 KV line in input in 415 volt in output of the transformer ?

1629

1)Explain why the cradle guard is used on railway crossing in overhead line construction?

5008

What is the universal motor?

1068

Why you want to join non technical field when you are an engineer?

6712

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

2018

what could be the RMS value and average value of a 4 phase sine wave?

1833

how can decide the current rating of oltc

2355

I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.

1434

How to test Alternator stability test for REF relay

1448

how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

2329

What is the main use of rotary phase converter ?

1102

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