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

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Engineering Interview Questions

Questions Answers Views Company eMail

how did the differential relay work to protect the power transformer

4 11145

what happen if i increase height of displacer type LT.accuracy or sensitivity are affected.why?

Essar,

2488

why do we have 230v a.c. as general voltage for domestic supply rather than others?

2 6451

In transmission line the line power loss only accured at resistance the inductance and capacitance wont consume power is it correct?

2 4616

What are the types of AMF(auto main failure) panel.

1 4324

sir, Is their any measuring unit of knoking? please explian?

Kirloskar,

1909

sir, why alternator output is connected to delta side in to generating transformer? any reasion?

Kirloskar,

3 7550

sir, Two different rating of generator going to connect parallel, can it set same DROOP or different. Why? Please explain

Kirloskar,

2 7090

Sir, why generating power plant operating at above 0.9 lag? detail explaination?

Kirloskar, L&T,

1 5592

what's the criteria of using over range protector when installing Pressure Gauge

1 4889

what is the techanical difference between german standard & japanese standard.

2088

generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

1931

what is the difference between shaft vibration and bearing vibration?

1 4343

What is the difference between Gas Turbine and gas engine in Gas Power plant ?

NTPC,

11 28180

why grid frequency varry time to time?

2 5227

Un-Answered Questions { Engineering }

How we calculate the size of ht cable for any transformer

2095

The concrete slump recommended for beams and slabs; is?

1276

what happen when increase or decrease size of lamp,light.glass.

1925

What are the advantages and disadvantages of jfet over bjt?

1069

Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?

1959

What are annotations? What are assertions? why they are used why not if-else?? what is normalization? what is QuickSort? what are Avl trees?

2381

Give some example of fault limiting devices?

1370

sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason

1487

1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

2284

What is chroma?

what is your experience in developing technical specifications?

2177

Explain the difference between hydraulic oil and engine oil?

1151

What is the PLC configuration in Cement industry?

3812

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

3104

what is a synchronizing lamp ?

1663

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