Indian Airforce Placement Sample Paper 3

8/6/2019 Indian Airforce Placement Sample Paper 3

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Indian Airforce

Air force Engineering Knowledge Test (EKT)

It has two sections. One is engineering Test. this is common for all engineering

branches. It has 40 questions. Each question carries one mark. No negative marking. And the other test is in u r specialization. I had written in electronics &communication.It has 35 questions. Each question carries one mark. No negative marking.

Duration of whole test is one hour. They will give both papers at a time. It isheld on 26-04-09

Engineering test

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 /relativea.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 sysmB.closed loop sysm with single feed back.C. closed loop sysm with multiple feed back.

18. If the gain of the open loop sysm 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 toanother 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 findchange 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 doesnt 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 Indiaa. PAL b. NTSC c. DFS

11. Skin depth of an waveguide doesnt 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 loadB. 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 voltage source of 5v with internal resistance 2 ohm can transfer max power toload 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. Something like this. I didnt 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

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Indian Airforce Placement Sample Paper 3