NTPC PAPER : 2007 AT NEW DELHI :

APTITUDE SECTION :

For this section no special attention is required only rs aggarwal is enough and it also has easy
level of English section.

TECHNICAL SECTION :

For this section u have to b good in the basics. No hard question were asked but u
should b careful about your time . It has also some part of very basic general
knowledge. The questions were from following topics

10-12 Questions about microprocessor(8085)

3 Questions about RS232 standard

7-10 Questions of GK

4-6 Questions on opamp

10-15 Questions on Digital Communications

2-5 Questions on microwaves

15-20 Questions on Analog Devices

20-23 Questions on Digital Electronics (flip flops,gates,mux,no system etc)

1 Questions on ISO OSI Model

5-8 Questions on Control System

10-12 Questions on Signals and their Processing

AND SOME QUESTIONS ON PASSAGES & LIKE

1. Passage
2. Word meaning based (antonym and synonyms) fetter, fester, lucid, anomaly, elucidate etc
3. Word analogy based
4. What is a tunnel diode
5. What is a Zener diode
6. Effect of + and – feedback on stability7. Composition of gobar gas
8. Function of differential in the vehicle
9. Function of stack register
10. Fun of instruction pointer
11. Fun of rst6.5,7.5
12. Wht is an interrupt
13. Output vtg calc on op amp
14. How a pulse train can b generated using registers
15. Conversion of oct to hex,hex to binary
16. Fun of quantizer in pcm
17. Why fm is less prone to noise
18. Fun of limiter in detection of FM
19. What is envelop detector
20. Phase shift of 1/s^2
21. Signal limited to 1000 hz sampled at nyquist rate. quantizer has 128 level .calculate the bit rate of the system.
22. 1.5 V battery supply same power to R1 and R2 separately(R1>R2).calc the internal
resistance of battery
23. A wire is cut in two halves. one half is again stretched to th twice of length .calc the resistance.