Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

advantages of vvvf drives over non vvvf drives for EOT cranes

2 4565

What is Load sharing of Transformer ?

2036

If a 1.5V,3W torch light bulb is connected in series with a 15HP/11.19KW,230V single phase motor and the combination is connected against a 230V supply and switched on than what will happen keeping all other parameters as it should be A)the bulb will glow normally B)the bulb will not glow C)the bulb will glow with extra brightness D)the bulb will burn out and if a fuse is connected to the above circuit will something happen to the fuse and what about the single phase motor will it be affected? Please explain with derivation

4 7040

what is an unbalance in acircuit? in a three phase 3wire circuit how an unbalance will come? in a three phase four wire system how an un balance is coming?

1844

what is cable meggering formula for low voltage ?

2350

IF we have 500kva transformer 11.0/0.415V, 50Hz. How to calculate the current on HT & LT side, how can we consider for its breaker (HT & LT both)? You are requested to solve the question herewith.

Bhutan Power Corporation,

3 14761

If I have a LT panel 3ph, 415V, 50Hz which demand load-600kw, how we can calculate its body earth strip size.

1 3812

What is method of calculating the fault current for a MDB, 50KW, 3PH, 415V, 50HZ?

L&T,

2145

our company have 750 kva oil transformer.still we have facing a problem that is when voltage is 11.5 kv coming from HT side then LT-side voltage is 420v or above at tape 1.please give me best solution to decrease the voltage

Gannon Dunkerley,

4 6735

In the UVR(Under Voltage Relay) there is a knob for the hysteresis setting. what is this setting? its threshold is given from 5% to 50%. please help me....

2 6177

why does a dc machine has high efficiency while working as a generator than as a motor ..

1999

what is mean by dry frequency

Siemens, TCS,

2461

Whats the difference between three phase and single phase?

4 8950

what is slip ring induction motor? How it works?

1 4470

what is the transformer

6 7729

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Un-Answered Questions { Electrical Engineering }

What is the meaning of 40X8X2 busbar dimensions for carring load of 400 Amps

1999

what is the setting of locked rotor in HT motor ? (answer expecting in percentage)

2285

what is servo motor & how does it work.

1951

how we can calcultae the short circuit level for bus bar

2239

what kvrah y we need to take the readind of that

2111

which VFD is better ( LT or HT)

2069

What is the function of RCBO? What are the different sensitivity ratings & each application?

2814

what is method for testing CT

2147

WHAT IS THE PARTIAL DISCHARGE TEST?

2118

how to decide the panel size like MDB ,SMDB PANEL SIZES

7377

what is the breaking capacity and making capacity of circuit breaker and how

2131

How to determine stage of Automatic Power factor controlling Relay(Apfcr)?

2163

redundant connection in contactor?

2503

What is the HVDC Transmission System? What are the conditions applicable to lay an HVDC Line?

2300

I AM GOING TO ATTEND APTRANSCO ON 26TH OCT 08.PLEASE SEND ME ANY MATERIAL OR TYPE OF QUESTIONS OR EXP QUESTIONS.

1955

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