Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the differance between negative dc voltage and positive dc voltage because some circuit uses -24,-5,-12,- 15,volt dc supply

eLab, Hero Honda, NTPC, Suzlon, Teradyne,

10 33653

What is the meaning of maximum demand

MN Dastur,

21 53170

what is star&delta connections?

5 10058

hi plz send me reliance placement papers..i.e electrical technical papers that have been asked in reliance test.

2442

What is the use of centrifugal switch in 1phase induction motor? Why is it so called?

2 6987

What does negative slip of an induction motor signify?

Tata Elxsi,

10 43476

In step down transformer (415/200V),mistakenly secondary side is connected to 415V for some hours, what would be result of this condition?

Essar, GAIL, Vizag Steel,

19 23967

WHY IS THE SIZE OF HOLE OF THE EARTH POINT IN THE PLUG POINT BIGGER THAN PHASE AND NEUTRAL

Jindal,

7 12518

What is the meaning of BUS?

CII, KLG Systel,

20 23015

What is the meaning of GRID?

21 35373

What about Reactive power.and role of that one?

7 8910

The importance of resonant filters in converters?

1 2934

How much Fault current can be contributed by a motor?

4 6574

In any Industry, Which voltage level either 3.3kV or 6.6KV to be chosen? Then I would like to know ,Is there any cost consideration or Rating of motor?

5 9268

what r the advantage of selecting micro controller type tripping of circuit breaker than relay type tripping?

BARC,

5 7313


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Un-Answered Questions { Electrical Engineering }

how to calculate units consumption for a 12 hp motor /hr.

1009


what is draiv work

1410


What is the mechanism of WTI

1344


what are the reasons of CT circuit faulty in busbar protection scheme?

925


Is it required to lay 2 runs of GI wires along with armoured cables from one power DB to another Power DB?

1450






how can i determine the gear ratio for a rack and pinion system if an electronic gate operated by an electric motor is to travel a distance of 5meters in 15 seconds.

1599


what is the working principle of a DG Set, Alternator, & exiter

9702


How will you utilise electrical power? You can start from the generating station.

1422


please I wont know how to calculate the vector group for power transformer ZNyn11 best regard.

1239


As per the Anchor capstan motor specification, full load current is 200A. starting current is 1750 A and acceleration time is less than 8 seconds. Please guide for selection of cable size.

1409


upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.

1608


a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

1156


a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------

1425


How to design harmonic filter at the project stage without nowing the harmonics levels

1744


What is Electrical Grade Aluminum for Tubular BusBars. i am confused between 6063 and T6 or T5 and what is BS 2898 and BS 159?

1391