Engineering Interview Questions
Questions Answers Views Company eMail

for preparation of design note of 11 / 220 kV , 3 phase, 63 MVA transformer how can calculate or consider the iron losses and copper losses

1 1328

How to calculate sand,cement for 1:5ratio brick masonary

IVRCL, Jamek, Prera Nirman Sewa, SPCL,

4 4796

what is the difference between rccb and elcb?

1 1782

Why is it that bus reactors are not accompanied by a neutral grounding reactor whereas a line shunt reactor is? PGCIL does so.

2 4986

What would be the quantity of cement:Sand:Aggregate (1:2:4) requirement for slab casting measuring 1mtr x 1mtr x 0.10 mtr (4 inches)?

560

Transformer rating=> 15/20 MVA.Why there are two raings? What should be the rating of the fuse at the secondary if the voltage level is 13.8KV/4.16KV?

Bhel,

1 3307

can we control operation of PLC from operator station?

3 2137

what is the reason for connecting hvdc monopolar line with negative conductors

317

On what principle the sonar/ radar works

3 3207

why to use 50hz only in tansmisson and as well as in distribution why not60hz?

2 1531

how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?

United Phosphorus,

455

what is the exact difference between zener breakdown voltage and avalanche voltage??

TCS,

3 3373

In a overhead system why the voltage between line &ground is taken for basic comparison ?and in case of underground cables the comparison take only by the voltage between cables?

L&T,

1 1724

how dc generator produce voltage initially?

Bisleri,

1 1292

There is a toy train that can make 10 musical sounds. It makes 2 musical sounds after being defective. What is the probability that same musical sound would be produced 5 times consecutively? ( 1 of _____) ?

TCS,

2 2306



Un-Answered Questions { Engineering }

in a building why we are using T beams? why can i adopt beam bottom & Top level as same as slab bottom & Top level?

372


A fan is handling hot air at 285 degC with flow of 411635 m3/hr, power consumed is 1165kW and efficiency is 66%. what will happen to flow, power and efficiency of the fan if a water spray system is introduced to reduce the air temperature up to 200 degC? (also please refer any document regarding this)

482


This is reqd for a 1MW Solar power plant..We have 2DC outputs from the solar panels Connected to 2INVERTOR panels.. Output from invertor is 3ph,280v,500kva,50hz.These are connected to individual ACB.This has to be stepped up to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT BY USING a single two winding 3 ph transformer 11kv/1250kva. or (2)use the two outputs and connect to one three winding transformer of above rating..Pls suggestwith details.

914


What is breather frequency of tank?

424


distinguish the knock phenomena of ci and si engine?

2923


i am in need of AC SYNCHRONUS MOTOR 30KW. ANY ONE KNOWS THE MANUFACTURER OF SAME. ALSO MOSFET AC CONVERTER 20KVA CONT.OUTPUT.

441


Write down the name of 2 lady Bir Pratin of Bangladesh

327


what is the three types of combustion-control system?

626


While converting delta into star or star into delta ,the three values of resistances remains unchanged .Find out the value?Let In star R1=x;r2=x;R3=x On converting into delta,R12=x;R23=x;R31=x Find the value of x

312


What is PDS and PDMS ?

493


Briefly describe means used by electricity suppliers to influence the flow of active and reactive power in power networks (one for each type)?

448


Why choke coil is connected in series with starter in tubelight??why starter is connected in parallel to tubelight??

302


how does WTI work ?

333


i opt cse branch in engineering.which subject i have choose in civil service preliminary examination

547


mccb service sittings be done?

303