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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is center gravity load in substation?

1421

why transformer neutral and CT Secondary neutral is connected to earth?

NCC,

3 2559

What is the main difference between generator and alternator

4 2487

How to calculate current carrying capacity of copper conductor _ such as cable size 25sq mm,50 sq mm, 75 sq mm, 100 sq mm

2 2500

What is the difference between diesel generator engine with and without turbo charger with the same capacity?

823

what is PDU in transformer?? which company manufacture??

974

a 440v 60hz 03 phase 100kw generator can deliver how much power in kw for 220v 60hz 01 phase load?

1 1113

can we use the 110 v primary Tr 240 v secondary step up Transformer as reverse 240 pri 110 sec

Hyundai,

3 2251

Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir

969

how ups works ? various parts of ups and working principle

Serco,

1055

Explain Power factor in simple words

ETO,

1 2616

Describe Non I.S. Earth System and why is it used?

KPJV,

853

Why lose 1 phase voltage in 33kv to 415v stepdown transformer

872

why wire sizes are 3/29 or 7/29 and why not wire sizes are 2/29 or 6/29?

OGDCL,

4166

why generation voltages are 6.6kv or 11kv and why not some one give that stander that generation voltages are 5kv or 12kv?

AES,

1 2647


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Un-Answered Questions { Electrical Engineering }

We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

993


Is there any question in the name of Static Switch in UPS??

1178


1 hp is equal to how much watt?

269


WHAT IS THE WINDING PROCEDURE OF ELECTRICAL MOTOR

3129


Differnce between negative Pahse SequenceFunction and unbalance Function?

899






what maximum range of star & delta in hp or kw ?

857


What should be current in the Primary and secondary side of 1000KVA (11KV Supply)Transformer.?

225


What is the purpose of stablization resistor in high impedance bus bar protection

1089


In 90 kva alternator that produce the output voltage is 115(p-n),200(p-p) at 1500 rpms means what ampere it produced ?

1146


what is difference between earthingpits,earthing grid & earthing mess?

1595


cc of scorpio?

1338


how to calculate the torque of a motor?

1201


100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.

1359


In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?

234


bsec exam syllabus (mis)

116