NTPC sample questions:
Some of the sample NTPC interview questions are listed below. Please go through them,
1. Which type of motors are mostly used in industrial applications. Reasons for that?
2. What are the different speed control methods employed in dc motors?
3. What is Armature reaction in dc motors. How it affects the performance of the machine?
4. Applications of DC series motor and DC shunt motors?
5. Why we cannot generate power at high voltage?
6. Difference between alternators employed in thermal plants and hydro plants?
7. What is equal area criteria?
8. What is the significance of ABCD paramters?
9. What is skin effect and methods to reduce skin effect?
10. Why busbars in EHV substations are hollow bars, what is the reason?
11. Why stones are employed in the switchyard?
13. What is the use of salt while earthing a power system?
14. Different methods to turn on the SCR? which method is best suited, why?
15. What is SCADA system?
16. What is the use of silica gel in the transformer?
15. Why we use test signals in control systems?
16. Difference between the open loop control system and closed loop control system?
17. What is Race around condition?
18. Why inductors are employed in power electronic circuitry?
19. What is surge impedance loading? Significance of Surge Impedance Loading?
20.What is Reactance relay, how they operate?
Please find answers to above questions. If you find difficult in answering, please reply me. I will post the reply. Thankyou Friends.
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