NHPC Interview Questions

Excerpts from Interview #1:

• Why we generate 11 KV power supply in generating station?
• If single phase is having 220 volts supply then why three phase is having 440 volts instead of 660 volts?
• What's the difference between voltage & current & emf?
• Why can not you store AC power in battery like DC power?
• Why doesnt a transformer have a starter?

• Tell something about yourself.
• Why do you want to work for NHPC?
• What do you know about NHPC?

Excerpts from Interview #2:

• How we calculate the spacing between the conductors in 11,33KV lines?
• What is the basic difference between synchronous motor, synchronous generator and induction motor?
• Why capacitor bank always connected in delta, why not in star to a system?
• What is rise time and half time?

• Are you good at working in a team?
• What is the most difficult thing about working with you?
• How do you think you can make a contribution to NHPC?

Excerpts from Interview #3:

• What is capacitor voltage transformer? How it is different from potential transformer?
• In 400 KV system why should we trip both side CB when we give hand trip?
• How do we calculate the spacing between the conductors in 11,33KV lines?
• What is AVR? Explain the function AVR?

• Introduce yourself.
• How do you establish good communication and information flow with others?
• Give an example of how you worked on team.
• Tell me about your proudest achievement.

Excerpts from Interview #4:

• State sampling theorem.
• What is cut off frequency?
• What is pass band?
• What is modulation and demodulation?
• What is a repeater?

• What are your plan for the next 5 years?
• Will you go for higher studies?
• If you are given option for MBA or job what will you choose?

Excerpts from Interview #5:

• What is function of an op amp?
• What is the difference between CDMA, TDMA, and FDMA?
• Give an example of a closed loop automatic system?
• What is the difference between JFET and MOSFET?

• Introduce yourself.
• Why didn't you join a private company?
• Are you a team player?
• Any queries?

Excerpts from Interview #6:

• What do you mean by operator overloading?
• State three differences between Dbms and Rdbms?
• What is the difference between ddl,dml and dcl commands?
• State what is encapsulation and friend function?
• What is the difference between function overloading and over riding?

• Introduce yourself?
• Can strength be a weakness?
• Why NHPC?
• What are your expectations from the company?
• Do you have any questions for us?