IAF placement /Sample paper 2009-2010 |IAF SSC officer Placement paper

Here are i want to share a Indian Air Force sample paper.IAF The Indian Air forces  paper based on electronics and communications questions and science related questions &  multiple choice questions.so see this question paper and make your preparation.

1) The triangle z, z+iz and iz of area or the side is 50 then in which plane it lies

2) If the area is increased by 69% then how much the side of the square will increase

3) To suppress ____________ we use some FM modulation technique

4) A central atom surrounded by 4 pairs of electrons is called

5) The area formed by curve y=cos x if x or y is 0 and pi/4

6) If the atomic number increases in periodic table then

7) Isotopes means?

8) At zero Kelvin the semi conduction in semiconductor is because of

9) To the physical balance when hot air is passed by a tube then

10) One problem in sequence number

11) In Geometric Progression all are positive numbers if the first consecutive two numbers are same then the common ratio will be

12) TWT question

13) Most commonly used metal in solar cells

14) Current conducting non metal

15) Which of the following doesn’t give flame test

16) In audio amplifier reason for using R-C coupled

17) Advantage over closed loop system w.r.t open loop system

18) Sound waves travel in air as?

19) In star network which of the following are true

20) Tank circuit is

21) If the frequency is beyond resonant frequency then the impedance is

22) In physics from lenz law or faraday’ law

23) The time period of the pendulum depends on

24) Weight of the bob

25) At 0 K semiconductor becomes

26) Water is flowing in a pipe of dia given and speed also given when it is attached with another pipe of diameter given then what is the speed of the water in second pipe

27) Cal of linear strain if weight is given and length it elongates also given

28) Angle of inclination of inclined manometer

29) Indirect way of generating FM

30) If S=1 R=1 then Q value of SR FF would be

31) Most ionic compound

32) In which compound will the sulphur will have more than one oxidation state

33) Alkali metals are characterized by

34) In the universe Carbon is in many compounds for the reason

35) A polynomial given when divided by another polynomial given

36) Probability of occurrence of A is given neither A nor B also given and stated A and B are independent events. Probability of occurence of B will be

37) Life cycle (Charge and discharge ) of Lead acid battery

38) logxto the base 8 +logxto the base 4+logxto the base 4=11 then value of x

39) In H2O2 oxygen is lost by oxidation or reduction then which bond of oxygen with hydrogen is lost

40) Max value of sinA + cosAfor the value of A

41) Alkali metals occurs in chlorophyll

42) Regarding series motor starting

43) In trajectile related question Range is given 100 m Initial velocity is 800 m/sec. find height of the object

44) Ball drops from height of 200 meters bounds back of 2/3 of its height when it comes to rest what will be total distance travvelled

45) No magnetic moment in

46) Same input given to NAND gate then the operation is said to be

47) Susceptibility unit

48) Why/What for strapping in magnetron

49) Maximum attenuation for wave propagation is

50) In radio what beam is used by directional finder

51) Peroxide effect

52) At 25 degrees Celsius Silicon barrier potentials

53) Two sine wave modulated by carrier wave of index 0.3 and 0.7 the combined index would be

54) Compound is used in or purpose

Second paper:

1. Capacitance of a cell measured in..?

2.To made House use electric heater which metal/element is better..?

3. Internal resistance of ideal current source..?

4. Integral of (dx / (xlogx))…?

5. Earth &geostationary satellites have same /relative
a.accleraton b.velocity c.angular velocity

6. Sound waves are
A .Longitudinal B. Transverse C both D .neither.

7. Demultiplxer can called as ..? Ans. data distributor

8. Set of instructions meant for to do some task is called. Ans…Programme

9. Properties Alkali metals..

10. Break down occurs in diode because of.

11. If u wants to connect two systems through telephone line which of the following u will use..?
A. Bus B.Modem C.Router

12. Inductor opposes sudden changes in… Ans…Current

13. Which is non renewable energy..
a. petrol b.Coal c.Wind energy d.nuclear

14. Which material is widely used for making solar cell?

15. Cell converts.
A. Chemical energy into electric energy
B. electric energy into chemical energy

16. Steel pipes made from…

17. Human being is
A. open loop sys’m
B.closed loop sys’m with single feed back.
C. closed loop sys’m with multiple feed back.

18. If the gain of the open loop sys’m is doubled then gain margin will become..

19. Corrosion of aluminum is not formed because of..?

20. If the speed flow in pipe of diameter 6 mm is 5m/s.If this pipe is connected to another of diameter 3 mm, then speed will be..

21. They give change in force and change in diameter of a square plate. Ask us to find change in pressure…

22. They give three sets of measurements .Which are sets forms triangle..?

23. Names, numbers and other information used to solve the problems of..
a.contrlo b.data c. instruction.

24. First aid of electrical shock victim..?

25. The performance (function) of fuse doesn’t depend on..
a. Type of material b .Length of the material..

26. Annealing makes the material… (Effect of annealing)

Electronics & Communication Paper

1. Sampling is helpful for..?

2. Sound waves are (It came in both papers)
a .Longitudinal b. Transverse c. Electro magnetic d.Gravitational

3. If two identical capacitors connected parallel then effective capacitance..?

4. Wein bridge is used to measure.. Ans…Frequency

5. Which configuration has min distortion..?
a. CLASS A b. CLASS B c. CLASS C d. CLASS AB

6. Which of the following is not system software..?
a. Linker b. Loader. c. Compiler d. none

7. Min No, of NAND gates required to realize the function AB

8. Flip Flops mainly used for..?

9. Which is noise free..
a. AM b. FM.. c. Both d .none

10. Terrestrial TV propagation System used in India
a. PAL b. NTSC c. DFS

11. Skin depth of an waveguide doesn’t depend on..
a. freq b. temp c .length of the conductor d.Type of material

12. Transformer rating expressed in

13. Electrical energy can be measured using..

14. An ideal opamp has….Ans..Infinite B.W

15. Restivity range of semiconductor..?

16. They give modulation index, carrier power ask us to find total power..

17. In JFET if Vds increased what happen to Ids.?

18. They give some freq and ask us to find Image Freq…?

19. In an Unbiased semiconductor the current is zero because of..

20. If BJT is in Cutoff region
A. Max voltage appears across load
B. a.Max voltage appears across Transistor.

21. Decibel used to measure
a. power b. voltage c .current d .power level

22. In RC coupling the value of C should be high because..

23. An ideal voltage source charges capacitor in

24. They give Vmax and Vmin and ask us to find modulation index?

25. A v
oltage source of 5v with internal resistance 2 ohm can transfer max power to load when the value of load resistance is…

26. One question electric motor. While switching on motor load should be present. If not what will happen. Some thing like this. I didn’t remember exactly..

27. Polarization in a dielectric is given by
A. P=xE B. P= (1-x) E C.P= xeE e=permivity…x=suspectance