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Engineering Interview Questions
Questions Answers Views Company eMail

3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?

1869

4-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?

3 11308

5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch

3821

7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

2277

How power factor of electric system improved?

Nalco,

6 9453

How to calculate cable sizes in sq.mm. with using motor KW? Any formula there?

Aswani Properties, BRB Cable, Construction, Hitachi, L&T, Microcool Systems, Nahar, NWPF, Reliance, Renault, Saha Bright Polytech, SGH, TATA, Techno Electric and Engineering, TFIL, Thermax,

18 306822

I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.

Duke Energy,

2033

what is the equation of converting KW into HP ?

4 9789

what is the equation to find out of full vollum of cylinder ?

Kuwait Oil Company,

2 5150

a cylinder, which length is 750mm and dia meter is 200mm, so find out a volume of cylinder ?

5 8333

what happen if i connect DYn11 and DYn1 vector group transformer in parrallel?other things are same like votage ration,x/r ratiob etc...

4 32691

is there any difference between protection C.T and measuring C.T?if yes then what is the difference?

BARC, Century Rayon,

4 12570

i m a frsh chemical engineer now i m confuse to attend the interview so anybody pls send model question papers to this christ_vivek33@yahoo.com

HPCL,

2204

why we r not earthed Control cable of C.T. terminals

HCC,

2036

What is the difference between an insulator and a dielectric?

2 7484


Un-Answered Questions { Engineering }

How does a tank-blanketing valve operate?

1239


give me a clear defination of inductance,and how can u calculate inductance of a motor

2803


What is the difference between scavenging and supercharging ?

1454


i) Distinguish between Theodolite and dumpy Level? (Marks-8) ii)Distinguish between Viscous and Turbulent flow? (Marks-8) iii) Distinguish between nominal and design mix? iv) What is standard sand? v) Explain the term plane stress? Vi) Differentiate between principal plane and principal axis? Vii) write short notes on Elastic limit of structural steel? viii) Write short notes on stress concentration? ix) write short notes on "Grading of Sand" ? x) How many grades of concrete are there under standard concrete?

12049


why unix commands simpler rather than complex task

2900


working principles of cf lamp,incandescentlamp and f lamp?

2255


dear sir, pls provide me a previous paper for hpcl engineers trainee exam for mechanical engg. this is a request pls do the needful as early as possible.

1956


What is the neutral voltage in practical AC systems

1548


What were vacuum tubes used for?

1087


What is the purpose of Chipping in the heavy foundation?

1620


How does agile communication differ from tradition software engineering communication? How it is similar?

3935


why electron produce magnetic field when it is in motion?

2153


If gas turbine is operating on part load, how droop will affect the output with respect to frequency.

2046


What is staring oil grade sae nos of gear box,in passenger car?

972


how the magnetic trains are leviated(MAGLEV)?

2071