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## AFCAT Previous Year Papers

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### AFCAT Previous Year Papers

AFCAT Previous Year Question Papers with Solution PDF

Candidates can download AFCAT Previous Year Question Papers For Technical Branch or others braches by pressing the below mentioned direct link in an easiest manner. So what are you waiting for? Go ahead and grab the complete details.

AFCAT Previous Year Papers With Answers

Q1. A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?

1. 120 metres
2. 180 metres
3. 324 metres
4. 150 metres

Q2. A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

1. 45 km/hr
2. 50 km/hr
3. 54 km/hr
4. 55 km/hr

Q3. The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

1. 200 m
2. 225 m
3. 245 m
4. 250 m

Q4. Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is:

1. 1 : 3
2. 3 : 2
3. 3 : 4
4. None of these

Q5. A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?

1. 120 m
2. 240 m
3. 300 m
4. None of these

Q6. The conductivity of intrinsic semiconductor is given by

1. eni(μp – μn)
2. eni(μp + μn)
3. ni(μp + μn)
4. ni(μpμn)

Q7. The core of a coil has a length of 10 cm. The self inductance is 8 mH. If the core length is doubled, all other quantities remaining the same, the self inductance will be

1. 32 mH
2. 16 mH
3. 8 mH
4. 4 mH

Q8. The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm2/s respectively. The diffusion length of carriers is

1. 1 cm
2. 01 cm
3. 0141 cm
4. 1 cm

Q9. Assertion (A): Electronic and Ionic polarization in a polyatomic gas are independent of temperature.

Reason (R): The orientation polarization is independent of temperature.

1. Both A and R are true and R is correct explanation of A
2. Both A and R are true but R is not correct explanation of A
3. A is true but R is false
4. A is false but R is true

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Q10. Two materials having temperature coefficients of 0.004 and 0.0004 respectively are joined in series. The overall temperature coefficient is likely to be

1. 08
2. 04
3. 001
4. 0001

Q11. The number of valence electrons in pentavalent impurity is

1. 5
2. 4
3. 3
4. 1

Q12. If the diameter of a wire is doubled, its current carrying capacity becomes

1. one-fourth
2. half
3. twice
4. four times

Q13. The law J = σE, where J is current density, σ is electrical conductivity and E is field strength is

1. Ohm’s law
2. Gauss law
3. Ampere’s law
4. Biot-Savart law

Q14. Assertion (A): Silicon is less sensitive to changes in temperature than germanium.

Reason (R): Cut in voltage in silicon is less than that in germanium.

1. Both A and R are true and R is correct explanation of A
2. Both A and R are true but R is not correct explanation of A
3. A is true but R is false
4. A is false but R is true

Q15. Material which lack permanent magnetic dipoles are known as

1. paramagnetic
2. diamagnetic
3. ferromagnetic
4. ferrimagnetic

Q16. A train travelling at a speed of 75 mph enters a tunnel 31/2 miles long. The train is 1/4 mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?

1. 5 min
2. 3 min
3. 2 min
4. 5 min

Q17. A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:

1. 130
2. 360
3. 500
4. 540

Q18. A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?

1. 320 m
2. 350 m
3. 650 m

Q19. A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is:

1. 50 m
2. 150 m
3. 200 m

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Q20. A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?

1. 5 km/hr
2. 70 km/hr
3. 79 km/hr
4. 2 km/hr