Indian Air force Engineering Knowledge Test (EKT) - 2009

Air force Engineering Knowledge Test (EKT) 24-06-2009

It has two sections.

1.Engineering Test - This is common for all engineering branches contains 40 questions.Each question carries one mark.No negative marking.

2.Test is in your specialization - contains 35 questions.Each question carries one mark. No negative marking.
Duration of whole test is one hour.

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 /relative
a.accleraton b.velocity c.angular velocity
6. Sound waves are
A .Longitudinal B. Transverse C both D .neither.
Ans. Longitudinal

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..
Ans. Electronic Configuration ns 1-2

10. Break down occurs in diode because of.
Ans. Avalanche and Zener Break down

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
Ans. Petrol

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
Ans. Chemical energy to electric 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.
Ans. C

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. 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..?
Ans. Provide Oxygen

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
a .Longitudinal b. Transverse c. Electro magnetic d.Gravitational
Ans. a

3. If two identical capacitors connected parallel then effective capacitance..?
Ans. CT=C1+C2

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
Ans. None

7. Min No, of NAND gates required to realize the function AB
Ans: 2

8. Flip Flops mainly used for..?

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

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 expressd 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..
Ans.Pc= Pt(1+m/2)^2

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

18. They give some freq and ask us to find Image Freq…?
Ans. Image Frequency=2 IF + Input Frequency

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 voltage 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.

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