Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Which one is given high energy in same power consumption AC or DC

Dhyey Creation,

1 2258

Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?

1424

Why in power plant projects we see DOL starting method used for motors upto 160 kW instead of star delta method

UCC,

1505

How to earth the star delta connected transformers?

UPPCL,

1 2322

In a synchronous motor. if start is running at high speed.  What will be the starting torque : Higher Lower Zero

1392

in the farm,water tank of 8000 litter capacity situated in 12 meter above.Farm owner want to lift 7000 litter of water within 7 minute to water tank of 12 meter above.which motor having HP rating is suitable for pumping??

ABB, Anchor, Havells, Keltron, KSEB, L&T, vguard,

1 2548

How can we measure the residual voltage in dc machines?

GPREC,

1364

why the neutral line is not giving shock to us if we touch it ?

GPREC,

1474

we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

RYK Mills,

1359

Define the "All - Day Efficiency" of a Transformer

Transco,

1 2746

Which colour of earthing wire

Aravali,

1 2125

We are dealer in Maharashtra State & We have recd. form C from dealer of Maharashtra State against our E-1 form. Now assessing authority is asking for counterfoil of our E-1 form. But, our E-1 form counterfoil is misplaced somewhere & assessing authority is disallowing the C form which is recd. from Maharashtra State.Please let us know the option for allowing C form?

1 1995

How to know the Max. current caring capacity of the cable by its size ?

SFPL,

1314

How to work definite,over pluxing,revers power,OSR relay

Ford,

1393

What happened if C.T mount at any cable or Bus bar in wrong direction . C.T going on proper work or not . C,T direction is essential thing to properly work.

1406


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Un-Answered Questions { Electrical Engineering }

What are high pass filter and low pass filter? and What are the flowmeter ?

1680


What are diffrent type of road taxes?

1599


In a carnot engine with an efficiency of 40%, the heat rejected to the sink at 27 C is 60 kJ, then the heat supplied in kJ to the engine by the sources is

814


how we calculate the withstansing current capacity of wires&cables?

1607


give me applications of sequence bridges . (used in 3 phase un balanced systems)

1630






Can you explain about Restricited earth fault protection scheme

1544


How to calculate the heat load for a electrical room

2743


Dear Mr B C pal...Can you plz. put some light on principle of operation of Z-Ct in conjunction to its use with 1Cx1000Sqmm HT Cables & Directional Ground Fault / Over Voltage Relays...Regd..Parag v K 9899115632

2398


Explain thin film resistors and wire-wound resistors

758


1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

4331


diameter of cable and core is doubled then the value of capacitance is

3870


What is a differential amplifier?

775


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

1663


What is error of a measurement?

814


What is mean by spike arrester(Voltage Operated)

1747