Electrical Engineering Interview Questions
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which fault current is maximum: 3 phase short circuit, LG, LL or LLG?? why?? in one of the problems that i have solved, 3 phase short circuit current on an unloaded generator came out to be less than the LG fault current. can anybody please explain why.

Bhel,

2 6867

Sir I want questions for rrb sec technician gr III (electrical)

RRB,

1 3950

wat is the difference between BE &BTECH.

8 7051




what is meant by ceiling voltage, ceiling current?? pl reply asap

4 16799

How regulator control the fan speed?

4 19858

i need bhel question papers.

Bhel,

5 8045

generaly all power generating devices is expressed in KVA or MVA then why power ststion is expressed in MW

6 9639

why skin effect is decreases with decrease with frequency? why skin effect occur

Kirloskar,

5 8917




Can anyone tell me how a 12v battery is transformed to 20,000v at the spark plug

6 10177

What is the difference between reciprocating & rotary motors in AC units, which is the best one in terms of operation.

MacLellan,

2 9798

how to select cable size?

7 17891

what is the different betweem earthing and neutral?

8 7117

what is the term of desruptive voltage

Bhel, Energy Infratech,

5 6383

can induction motor run over the rated speed ?

ACC,

12 9949

Using 11000V/433V,3 ph,50Hz,500 KVA, what is the maximum capacity of motor in KW that can be connected and started at a single moment? Also explain about any calculations and formulas used in deriving the same.

4 4654


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Un-Answered Questions { Electrical Engineering }

in basic 2 phase will short means tripping the power but spot welding 2 phase shorting but not tripping it will welded why.....(Q)

727


What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor

188


we use 400/5A ct and 35/roor3KV,/0.1/root3KV,0.1/root3KV pt ratio. What is the multiple factor of this meter.

810


How to Calculate The Neutral Earth flat design calculation for the Synchronised generator (Gen 1-650Kva, Gen 2-725Kva

408


When MICC cables used ?

812






WHY BREAKER ARE USED IN SUBSTATIONS?

881


What is the formulae of Megger value for a A.C.Motor

1558


Pl. give me checklist for installation & commissioning of machine tool.

1004


substation+ plc system

707


what are the differences between 'exhaust fan', 'heavy-duty exhaust fan' & 'super heavy duty exhaust fan'. what are their power ratings ?

841


What is distance between electrical panel to land ?

130


What is deference between MCB & MCCB & ISOLATOR

631


. What is Electrical Life & Mechanical Life of Circuit Breaker? 2. What is Electrial Life & Mechanical Life of Magnetic Contactor? 3. What is RCD, RCCB & RCBO? 4. What is the Between defferance of RCD, RCCB & RCBO?

2025


what is cause of static electricity? I experience shock when i touch metal equipment in a room ,furher check shows earth leakage showing 80ma at the DB near to the 400 MCCB?

702


which connection is safer series or parallel?usually which connection we prefer at home?

5364