Electrical Engineering Interview Questions
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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 9523

how to reduce earth to neutral voltage?

Field Gun Factory,

8 23792

what is the differnce of STATIC ENERGY METER FROM ordinary energy meter?

1 2693

Any one can explaination about calibration with rotating sub standards?

1511

What is the basic working principle of Tri vector meter?

TCS,

5 29837

What is the difference between double compression

Bhel, Hyundai, Orchid Chemicals and Pharmaceuticals, PDO, Prefamac,

7 56534

how current flows in circuit?

11 14540

What is the current flow in 230v ac supply ? What is the current flow in 415v Ac supply ?

6 29996

why the power factor in inductive load is lagging while it is leading in capacitive load?

6 17133

what type of earthing is done on hilly rocks.

4 17663

what is the difference between Earthing,Grounding and neutral?

Biocon, Tata Steel Limited,

3 6635

What is the output voltage of a DG set.

Fitness First,

3 7749

Why PT voltages are measured with respect to ground? What do u mean by voltage or current polarized.

Grasim,

1894

I am inpecting a 10kVA UPS what tests should i do and should i observe?

1762

what do you mean by synchronous speed of a three phase induction motor?

FlexPoint,

5 12912


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Un-Answered Questions { Electrical Engineering }

WHAT IS DIFFERENCE BETWEEN CAPACITOR AND CAPACITANCE?

1442


can any one suggest me the tilt angle of my solar pannel ?? or tell me how can i know the fix tilt angle of my solar pannel?? my cordinates are 31.503629,72.993164.

1353


Why ground terminal is used in pot meter 10k ohms

1417


what is distribution board?

1834


The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

1140






why we can stote dc? why we cant store ac?

1585


what is automatic voltage regulator?we can control the vlotage by using fuzzy controller in matlab?why we go for fuzzy?

1467


what is self capacitance of inductor

1812


i have applied for the post of RRB section engineering chennai board please send me previou papers and solved answer. my mail id jagarapusrinivas@gmail.com

1456


two way ckt diagram can be drawn by how many ways? give diagram

1317


How could a garment factory benefit from renewable energy

2332


what is meant by directional earth fault and non directional earth fault? describe both.

1444


can anybody tell me that for p.f. Improvment we use capacitor banks but how to decide its capacitance. As we all know how to calculate kvar but what abt capacitance value

1368


what is induction furnance? how many phase supply given io its coil for 15 or 20 ton furnance?

2601


The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?

1491