EKT exam along with AFCAT exam was recently conducted on 22 February 2015. EKT or Engineering Knowledge test is conducted to select candidates for the technical branch of the Indian Air Force. After going carefully through each of the 50 questions and  careful analysis SSBCrackExams is releasing EKT 1 2015 answer key.

Hopefully, this EKT 1 2015 answer key will help you in finding out how many marks you are getting in this AFCAT ekt exam, keep in mind that  EKT 2 1014 cut off mark for electrical and electronic branch was 45 marks out of 150 marks.

Out of 50 question 6 questions were asked from Control System. Around 9 questions were asked from communication system. 5 questions asked were Engineering Mathematics. 4 questions were from Electronic devices. 3 questions were from information technology. Hopefully you must have got a rough estimate about the question pattern in EKT 1 2015 electrical and electronic stream.

Few question from EKT 1 2015

Total No. of Questions 50, Each Question is of three marks. One mark will be deducted for every wrong answer.
Ql. If x=a(cos t + t sin t), y=a(sin t – t cos t). The value of dy/dx is
(a) cos t
(b) sin t
(c) tan t
(d) sec2 t

Q2. The area of three faces of a cuboid are in the ratio 2:3:4 and its volume is 9000 cm3. The length of the shortest edge is
(a) 15 cm
(b) 30 cm
(c) 20 cm
(d) 60 cm

Q3. ∫▒dx/xlogx  is equal to
(a) log x+x+c
(b) log(logx)+c
(c) xlogx+c
(d) (log x )/x+C
Q4. Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
(a) 8/2
(b) 9/20
(c) 8/15
(d) 2/20

Q5. The projection of a vector on another vector is
(a) Scalar
(b) Vector
(c) neither vector nor scalar
(d) either scalar or vector
Q6. In MKS system, we measure
(a) mass in kilogram
(b) distance in meter
(c) time in second
(d) all of these

Q7. When the separation between two charges is made four times, the force between them
(a) increases four times
(b) decreases four times
(c) increases sixteen times
(d) decreases sixteen times

Q8. When a conductor cuts magnetic flux, an emf is induced in the conductor. This is known as
(a) Joule’s law
(b) Faraday’s law
(c) Coulomb’s law
(d) Ampere’s law
09. X-rays are used for the study of crystal structure because
(a) X-rays are completely absorbed by the crystal
(b) the wavelength of X-ray is of the same order of magnitude in the inter-atomic spacing in crystals
(c) the wavelength of X-rays is very small in comparison with the inter-atomic spacing in crystals
(d) the crystals are completely transparent to X-rays

Q10. A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight 40 days earlier
(a) 600 g
(b) 1000 g
(c) 1250 g
(d) 2000 g

Q11. Angles project true size only when the plane containing the angle and plane of projection are
(a) Aligned
(b) Adjacent
(c) Perpendicular
(d) Parallel

Q12. Tesla is a measure of
(a) magnetic flux density
(b) electric flux density
(c) magnetic potential
(d) electric potential

Q13. Admittance is reciprocal of
(a) susceptance
(b) impedance
(c) reactance
(d) conductance

Q14_____is an active filter
(a) RC filter
(b) notch filter
(c) Butterworth filter
(d) band pass filter

Q15. For transmission line load matching over a range of frequencies, it is best to use a
(a) Balun
(b) broadband directional coupler
(c) double stub
(d) single stub

Q16 Emitter follower is used for
(a) reducing the gain
(b) increasing the distortion
(c) impedance matching
(d) none of these

Q17. Binary equivalent of (45)10 is
(a) (11101)2
(b) (11110)2
(c) (101101)2
(d) (110101)2

Q18. In Computer memory size K indicates Kilo, which is equal to
(a) 1000
(b) 1024
(c) 100
(d) 10000

Q19. An astable multivibrator has
(a) no stable state
(b) one stable state
(c) three stable states
(d) two stable states

Q20. An ideal Op Amp has .
(a) infinite input and output impedance
(b) very low input and output impedance
(c) low input impedance and very high output impedance
(d) infinite input impedance and zero output impedance

Q21. An instruction used to set the carry flag in a computer can be classified as a
(a) data transfer instruction
(b) arithmetic instruction
(c) logical instruction
(d) program control instruction

Q22. An FET is a
(a) bipolar semiconductor device
(b) unipolar semiconductor device
(c) non semiconductor device
(d) both (a) and (c)

Q23. For Gunn diodes, semiconductor material preferred is
(a) Silicon
(b) Germanium
(c) Gallium Arsenide
(d) all of these

Q24. In a JFET drain current is maximum when VGS is
(a) zero
(b) negative
(c) positive
(d) equal to Vp

Q25. The output of Laser is
(a) Infrared
(b) polarised
(c) narrow beam
(d) coherent

…..Rest of the questions can be found in the above given EKT 1 2015 question paper pdf file.

EKT 1 2015 answer key and question paper analysis.

Link to answer key pdf file: EKT 1 2015 answer key of electrical and electronic stream pdf file

EKT 1 2015 question paper: EKT 1 2015 question paper of electrical and electronics stream

Complete EKT 1 2015 answer key pdf file for the above given questions of electrical and electronic engineering questions can be found above in the post.