Electrical Engineering Interview Questions
Questions Answers Views Company eMail

ALL HT /LT PANEL TEST? DISCRIPTION.

Essar,

24306

DIFFERNCE BETWEEN DCS AND PLC? HOW IT WORKS?

Essar,

690

How much duration I can keep open the CT if it is under loading condition(100 Amp load)?

NTPC, Suzlon, Infosys,

3 3380




How to reduce the static electricity producing in solvent room? By P.D.Patil BioCon

Biocon,

775

During a temperature rise test of a bus duct, it is fed with 415 volts at 2000 amperes. Why dont we get an electric shock if we touch the bus bars?

ABB, SDBL,

6 7762

how to calculate circuit breaker capacity

Siemens,

5 60400

what is the difference betweem star connected motor & delta connected motor?

13 80877

what is the CT of protection and CT of metering ? what is class 5P10 & 5P20 and class PS ?

ONGC, JEE Main, VRA,

16 101931




it is in our knowledge tht right plug of supply of residential suppy system is phase n other is neutral...howevr the battery charger of mobile works in both ways...i mean it is not restricted in only one direction.ny of the holder of charger can hav phase .so y is it not lik tht phase of supply must b connected 2 phase of charger...?

TATA,

707

can v rotate single phase induction motor in both the direction...?

1 2605

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

700

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

670

how can i select the cable ratings

4 3349

i want to model paper for section engg.

Infosys, RRB,

771

what is the diffrance between earthing and grounding...?

Essar,

6 6338


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Un-Answered Questions { Electrical Engineering }

what is the usage of microcontroller in the panel board?

746


What is the high series capacitance winding on high voltage power transformer ?

737


why the pf of semiconductor device is improved the electrical devices

542


what will happen if earth of 33 kv cable (earthed system) is not connected to earthing pit?

735


It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

761






Between educational qualification and practical work experience, give us a brief explanation on your practical experience in your past Endeavour that you performed well to the satisfaction of your past or present employer?

916


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?

854


How to address the servo drive for motor

681


In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

766


how to find three phase complex power in per unit and MVA?

783


How Load Factor, Demand Factor, Diversity Factor etc best applied in designing an electrical circuit? Is it allowed to consider these factors in each and every panel in an electrical distribution system? Can any body suggest a good book for reference?

1572


does a DG set has low fault level as compared to that of a transformer.If yes then why.

616


Is there a possibility to use such a treshold voltage for the NMOS part of a CMOS circuit that during the switching it will start conducting only after the PMOS part will be already closed, by this eliminating the leakedge current? Please note, I'm not asking about the well bias in standby mode, but about the "antileakedge" measures during normal operation.

652


What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?

568


Briefing the effects of ASR and ACR of a double closed-loop speed regulating system.

681