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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

diffrence between abcb and mocb

UltraTech,

1 1918

why dc motor is called constant flux motor?

1 2184

why do we use LPF wattmeter not UPF in the experiment of no load and blocked rotor test of 3phase slipring induction motor?

Matrix,

3 11295

what are the safety in transformer,diesel generator,ups, chiller plant,h.t. , L.t. , sewage treatment plant(stp),water treatment plant(wtp), fire. plz ans. me in detail if you know any of the mention above. i urgently need

Claris Lifesciences, EFS,

2 2659

what is conductor copnstant of ab cable

814

when the flux enters into saturation mode then what will be the secondary voltage of the normal t/f?....high or low ? explain ...how?

1 1360

howmany electrician should maintain for a 1000 kva used plant... in kerala..

Godrej,

1116

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..?

Afflatus Grauver Pvt Ltd,

842

Sir, Please tell me that how I will calculate the efficiency of rectifier. Because input is ac and output is dc. Is it right to put two unlike signal together.

2 1356

Why  we are always  only used 11 kv.  , 22 kv ,33kv      in transmission line? Why not use 25,  55 ,65 kv ?

Khidmah LLC, Precision Camshafts Limited,

3 3082

What is the effect of atmospheric pressure & Temp; on efficiency of motor? Why NGR(Neutral Grounding Resistor) is used in 132/11 KV Transformer & how? What is the use of Auto T/F in Grid Station?

K-Electric Limited,

937

In Generator How suction compression power and exhaust works ?

Sify,

985

what is B , c & d curves in MCB characteristics i e Full Form of B , C & D . sir please give me answer

NCC,

1 2210

What is means by MacAdam Ellipse?

1 1767

Why we not use the impedance relay in protection of short transmission line ?

4 4988


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Un-Answered Questions { Electrical Engineering }

what happen if generator of micro hydro running at only a small percentage of its capacity, as a comparison, if the diesel generator that runs on only a fraction of its capacity there will be a wet stacking

967


Define characteristics impedance?

177


An automatic water heater is an example of which type of control system?

193


How relay works, reverse relay, master relay, os relay, earth fault relay and what is its setting point

687


What is the loss of power of transformer 220kv/33kv,63/80mva of % imp12.05 at 80%load

819






When and where resistance earthing is used ? How to calculate the time constant for earth fault

917


HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

964


We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.

904


why we r not earthed Control cable of C.T. terminals

1049


Motor,transformers,capacitor tubelight etc....

698


List the advantages of star-delta starter with induction motor?

166


What is the drawback of class b amplifier? How is this minimized?

178


how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.

944


The moisture in air will condense at

184


why did youi choose this career?

1307