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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is switch gear? How it is work ?

AbaQulusi Municipality, Lupin,

1 4724

How is efficiency of DG set calculated? At many places I found the efficiency to be mentioned in percentage. But at some other places I found kWH/ litres. I want to know how dimensionless percentage value is arrived at?

ADS Spirits,

1917

How are load losses and no-load losses measured at site in a DG set?

1749

HOW WE WILL CONNECT THE PHASE CTS AND NEUTRAL CTS TO REF RELY

3 5734

what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.

DVC,

3238

what type circuit breaker is suitable for connecting 1000A load VCb,Mccb?

Gridco,

5 7434

725KW Three DG set Synchronised but DG no-1 power showing 750KW DG n0-2 power showing 500KW DG no-03 showing 500KW. DG is Shynchronised but why this different power showing?

3 5849

WHY WE ARE DOING THE EARTHING IN A SYSTEM. SOME PEOPLE ARE TELLING FOR PROTECTION. WHAT PROTECTION GIVE ME THE CORRECT ANSWER.

2 4620

What is the use of Exciter in generator? & what will be the current of Exciter in 500 KVA DG Set?

2 9827

is there a different b\w ground fault CB and earth leakage

1 3584

why the active power flow of some line is increased when the active power of out is cut ?

TAFE,

2052

i have 400/230v transformer and didnt done the neutral eatrhing. i connected one lamp to one phase and neutral to the earth. but the lamp is not glowing. again i connected neutral to earth and repeated the same. then the lamp is glowing. in the first condition i tested with a line tester also, at that time the tesrer is glowing what is happening i dont know can any one help me?

1 3628

A 60W,250V bulb when connected to a 230V supply will it give more light or less or will be give normal light?

MahaGenco,

3 6802

what happen when we add mentos in cold drink?& why?

2058

What is the material used for the core of a high freiquency transformer?

Videocon,

3 5960


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

Leakage current,un balance current which relay using for high voltage transmission?

2162


Why negative feedback is preferred in the control system?

1258


why the making current is more than then the breaking current and if its true then its about a controling circuit or breaker power contact points

2074


Define closed loop control system.

1085


generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

1921


how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

2264


When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

1903


how to maintain frenquncy with syncronising sub-station for distribution

2129


what is difference between speed mode and torque mode in motor?? explain in simple words please.

1596


Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)

2105


what is the Pickup/drop off ratio in BCPU relays

4647


What are two contours of nichols chart?

1094


How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.

3379


define digital electronic

1985


what happen when we add mentos in cold drink?& why?

2058