# CIL MT Previous Solved Paper for EE/EEE/ECE [Memory Based]

## CIL MT Previous Solved Paper for EE/EEE/ECE [Memory Based]

### Coal India Ltd. Previous Exam Questions

This Test is based on Previous CIL MT Exam Paper. Helpful for upcoming exams.

#### Useful for CIL MT and other PSUs Exams.

Exam Held in 2011 [07 August 2011] by Coal India Ltd.

1. UHF range is?
Ans-(300-3000)MHz

2. Optical fiber communication is based on?
Ans- Total internal reflection

3. Balanced modulator suppress --------carrier

4. indirect method?
Ans- Armstrong method

5. the modulation index of AM wave change from 0 to 1, the Tx power is
Ans- Increase by 50%

6. a source symbol four probability 1/2,1/4,1/8,1/8. the enropy is ------1.75 bits/symbol

7. which can not demodulate SSB-----------product detector

8. a system is critically damped if system gain increase then it would be ----- underdamped
Hints: Increasing the gain reduces the stability and thus will make it underdamped.

9. Q meter based on-----------series resonance

10. a meter range is 0-50 mA then sensitivity--------------20 Kohm/volt

11. wave guide act as---------------HPF

12. which device is suitable for very low power oscillator----tunnel diode

13. Tv reception antenna--------------yagi uda

14. VSWR=(1+K)/(1-K)

15. calculate Zo .......if Zoc & Zsc Given (simple question)

16. A high Q has---------low BW

17. Unit of Conductivity----------mho/Meter

18. the shortest stub length lambda required to produce a reactance equal to----lambda/8

19. inductance in series----------L1+L2-2M

20. the value of delta n/w is given 5,15 &30 calculate Wye n/w--------3,1.5,9

21. LT[2/(s(s+1)) at t=infinite is---------2

22. energy band gap of Si?
Ans-1.1ev

23. Schottky diode is used for --------high voltage rectification

24. in saturation region----------bith junctions r FB

25. value of Ic & beta was given calculate Ib (very simple question)

26. ideal Opamp is-----------voltage controlled voltage source

27. if square wave is applied to differentiator o/p is--------triangular wave

28. calculate CMRR id Ad=0.35 & aCM=3500

29. eBRESS MOLL model applicable to---------BJT

30. to make N-type---------------Phosphorus

31. 1 eV=?
Ans- 1.6 x 10^-19

32. a complementary push-pull amplifier use ----NPN+PNP transistor

33. audio & power amplifier use---ferrite corew

34. 43 in Hex & BCD form-2B & 01000011

35. A+ Compliment(A)B=A+B

36. minimum no of NAND required to design AB+CD------3

37. how many 2:1 Mux use to design 4:1 Mux------------3

38. combinational ckt consist of

39. thyristor is?
Ans- a 4 layer device

40. A GTO thyristor------can be turned off By negative current pulse at gate

41. main switching element in SMPS is?
Ans-MOSFET

42. which of the following, not a linear data structure-------------Tree

43. a logic ckt is given-the required i/p conditiopn to make o/p 1------ans=(0,1,1)

44. which of the following pair is commonly used in the thermocouple
(A) Fe-steel
(B) Al-Sn
(C) Cu-constantan
(D) Silver-German silver
ANS: C

45. A Master-slave FF has the characteristics that
Ans: change in O/P occur when the state of Slave is affected'

46. The power in the signal X(t)= 8 cos(20 pi t - pi/2)+ 4 sin(15 pi t) is
(A) 40
(B) 41
(C) 42
(D) 82
Ans: 40

47. A Hartley Oscillator is used for
Ans: audio frequency oscillator
Hints: Hartley, cool Pitt, and clap all are used for Radio Frequency applications. For Audio freq its RC phase shift oscillator.

Check it: CIL MT detailed Syllabus
CIL MT(Mechanical) Solved Paper

*Note: These are the memory based questions so some question may be wrongly framed. If any correction required in any question please do comment below the correct form.
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