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

Satellite Systems Engineering (106)
Engineering AllOther (1379)

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?

1886

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 11348

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

3837

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,……..,?

2299

How power factor of electric system improved?

Nalco,

6 9504

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 307030

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,

2058

what is the equation of converting KW into HP ?

4 9842

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

Kuwait Oil Company,

2 5180

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

5 8399

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 32746

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

BARC, Century Rayon,

4 12638

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,

2221

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

HCC,

2053

What is the difference between an insulator and a dielectric?

2 7523

Un-Answered Questions { Engineering }

what should be the PCC ratio to construct a plinth of (40x40x4)ft...??also its estimated cost??

3118

please send me last 5 year interview questions

2224

what is the method of earthing of a transformer using electrodes?

2293

what is the work of commutator and brush in motor

1670

Define what are the properties and application of manganese steel?

1120

I am completed BE electronics and communication engineer I have 4 years experience in mainteance dept .am applying for c license is possible...How 2 get c license

1740

in 132kv substation CRT means

2639

Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

2210

What is the difference between generator differential protection and transformer differential protection??

2173

Explain why re-heater is used in gas turbine

1191

in regenrative cycle why to use two liquid(water&mercury) on steam genration cycle.

1776

How to calculate the current of Highpressure Mercury Vapour Lamp?what is the basis?whether we have to consider power factor or not?

2175

I have to conduct load test on greting cover, pressure gauge is in kg cm2, how to caluculate load on this greting cover.

2338

if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .

2084

a sewer which receives the discharge of no. of house sewer is called house sewer lateral sewer intrcepting sewer sub-main sewer

2570

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