AAI Junior Executive (ATC) question papers

I am doing the preparation for the AAI Junior Executive (ATC) exam? So I am looking for the AAI Junior Executive (ATC) question papers? Please tell me from where I can download it old question papers?

[Kiran Chandar]

You are asking for the AAI Junior Executive (ATC) question papers. Here I am providing you the AAI Junior Executive (ATC) question papers. These are as follows:

1. Which of the following schemes have the best error performance with the same energy per bit?
1. 16QAM b. 16PSK c. QPSK

2. Same Antenna is used for Tx and Rx. Radar range related to Antenna gain as
1. Directly prop. To G
2. Direc. Prop. To sq. root of G
3. Inversely prop to G

3. Thermal Noise in conductor related to B
1. B
2. 1/B
3. B2
4. Square root of B

4. A control system with feed back gain 0.1 and forward gain 10. What is the sensitivity of the system w.r.t the feed back system.

5. The value of ‘k’ for the system to be stable is. ( 6th degree Characteristic Eqn given)

6. Which of the following system is stable.
1. As2 + Bs +C
2. As2 – Bs +C
3. As4 + B s3 +Cs+D
4. -As2 – Bs -C

7. Linux OS based on which architecture

8. Comparison betweeb Macro and Subroutine
1. Macro better that Sub Rtne with respect to storage time and execution time
2. Vice versa
3. Macro better that Sub Rtne with respect to execution time only
4. Vice versa

9. Which of the following is a privileged instruction?
1. MOV A B
2. INT 21
3. ADD A B
4. IN 08

10. Which of the following instruction is not converted to binary by an Assebly Language Program?
1. TRAP
2. Interrupt
3. Privilige instruction
4. Sorry don’t remember

11. In which type of machine can multiple tasks be done
1. Virtual Machine
2. Sorry don’t remember

12. Which of the following has the highest distortion?
1. A
2. B
3. AB
4. C

13. Which of the following distortions occur in Class B push pull amplifier?
1. Harmonic
2. Intermodulation
3. Phase
4. Sorry don’t remember

14. ?(s)/T(s) of a rotational system (J,B,k regular notaions)

15. Schmitt Trigger with 3V & 1V UTP and LTP respectively. A sinusoidal input with 10V peak is fed as the input. The output swings between

16. Op-amp circuit given. Identify the circuit (Ans: Peak detector)

17. 6 bit binary ladder with 101001 as input ( 0= 0V , 1 = 10V). Output voltage is ——

18. Doppler Radar of 1125 MHz. Frequency of received echo is 125 MHz. The conclusion is
1. Target also has a radar
2. Target moving away
3. Target approaching

19. Microprocessor cycles between
1. Fetch and Execution operations.
2. Fetch and Halt

20. Modulation index of an FM system with 2.5V, 500 Hz input and 5KHz deviation is

21. Routh’s Criterion gives
1. Number of roots on the LHS of S plane
2. Number of roots on the RHS of S plane

22. For the system to be stable, the roots of the characteristic Equation must lie
1. Left side of the S plane
2. Right side of s plane

23. Impulse response h(t) of a system is
1. Inverse Laplace transform of Transfer Function

24. The output of a LTI system with Guassian process input is
1. Gaussian
2. Poisson

25. Spectral Density and Auto-Correlation are
1. Laplace Transform pair
2. Fourier Transform Pair.

26. A flex Klystron is a
1. Microwave amp
2. Microwave Oscillator
3. Both amp and Oscillator
4. High cavity tube

27. S Matrix related question.

28. Block diagram given

Oscillator(1MHz) à Divider (/ 10^6) à Schmitt Trigger à Flip Flop à. Output is

1. Pulse Train of width 1 sec
2. Pulse Train of width 2 sec
3. Pulse Train of width 0.5 sec


1. Impulse Response Of The System H(Z)=Z^(-m)

2. A compact microstrip antenna may be obtained by…….
Top of a microstrip antenna may significantly affect the radiation properties. ... slits in the square patch, and the gain-enhancement is obtained by adding a high

3.i/p impedance of short circuit loss less transmission line of characteristics impedance 50 ohm is………….
2 Equations for a “lossless” Transmission Line ... 15 Characteristic Impedance of a Lossy Transmission Line ..... Some typical values can be found for Z0 = 50 ohm cable with a polyethylene dielectric and ... Short Circuit “Termination” R = 0 ..... For high powered systems to deliver a particular power level P = IV ,

4. Primary rate interface (PRI) consists of……………..
The T1 line consists of 24 channels, while an E1 has 31. ... The Primary Rate Interface (PRI) consists of 23 64-kbit/s B-channels and one 64-kbit/s D-channel

5.Centroid for closed loop characteristic equation 1+k/(s+1)(s+2)=0 is 1)0 2)-1 3)-2 4)-3

6. Gain margin of 0.75/(s+1)(s+2)- Construct the polar plot for the function
GH(S) =2(S+1)/ S2. find Gain cross over frequency ,Phase cross over frequency, Gain margin and Phase margin

7. Co –axial sexless connectors can be made of
should be remembered that performance starts at the ..... ground rules for precision sexless coaxial connectors .... made popular as the OSSM connector.

8. Alloy to make aircraft Frames ……………………..
In older aircraft, manufacturers used wood for frames, cloth to cover wings, metal (steel or aluminum) for various structural parts, rubber for wheels, ... Various alloys of Aluminum. ... What materials were used to make the wright brothers planes?

9. Eqn of the wave, When we claps our hands……………..
A good analogy is to consider what happens when we clap our hands. Clapping launches an acoustic wave, whereas a dipole launches an electro- magnetic ..... from Eq. D-1, the induced voltage is equal to the incident field strength E times
10.CCIC(co channel inter connection) is used to ………..
1)to separate carrier and voice signal. 2) Carrier and guard signal. 2) Carrier and guard signal

11. Higher power microwave generator
1)TRAP
2)IMPAT

12. CHINA NAVIGATION &POSITIONG SYSTEM IS KNOW AS

13. TWO VECTORS a+b=a-b is known as
1) parallel 2)orthogonal

14. Question On Young’s double slit experiment

15 .Which countries is known as big apple

16. DNA invitrosynthesis

17. Brahmaputra shared by
1) china-mannamer 2)china- Bhutan

19. Assam is surrounded by (in four directions)

20. The rivers we cross when we travel from Bangladesh to Delhi………..

21.which ocean is in “S” SHAPE………..

22.”MAHA”Part of Malabar was the western ghat is located in 1) Tamil 2) Kerala……………

23. TCP-IP stack equivalent to the transport layer of CSI Model…………..

24. Which protocol is used to find the n/w address of a local device?

25. Maximum bit rate for the 802.11g………………..

MEANINGS OF
26. FRAGALITY- characterized by or reflecting economy in the use of resources

27. EXPEDITE- verb) to hasten the action of; to speed up; to accelerate; to facilitate; to dispatch.

28. EVASIVE evasive adj. Inclined or intended to evade: took evasive action. Intentionally vague or ambiguous; equivocal

29. DISTINCTIVE . (a.) Marking or expressing distinction or difference; distinguishing; characteristic; peculiar

OPPOSITE OF
30. REVENOUS "full, satisfied

31. INCOHERENT-intelligible, understandable"

32. RESOLUTION- "compliance, indecision, weakness"

33.4 QUESTIONS ON MOSFET

34. QUESTIONS ON OP-AMP

35. QUESTIONS ON STLD(REGISTERS,FLIP FLOPS

36. QUESTIONS ON ANTENNS

38. A BIPOLAR TRANSISTOR IS KNOW AS - The junction version known as the bipolar junction transistor, invented by Shockley in 1948

1) VOLTAGE CONTROLLED CURRENT SOURCE

2) VOLTAGE CONTROLLED VOLTAGE SOURCE

3) CURRENT CONTROLLED CURRENT SOURCE

4) CURRENT CONTROLLED VOLTAGE SOURCE