Avionics Online Test

1. What is the time delay in a coaxial cable is the dielectric constant is 2.3?

2. Which of the following does not provide a proper reason for not using HMD in civil aircraft?

3. Which of the following is used to obtain the altitude from the static pressure?

4. The spectrum space occupied by a DSB signal is the same as that of a conventional AM signal.

5. Which frequency band does the direct broadcast satellite system use?

6. What is the number of components of the vector that describes the translational motion of the vehicle?

7. The maximum shift in frequency is 3kHz and the minimum and maximum deviation in frequency of the actual signal are 149.97MHz and 150.03MHz. What is the carrier frequency?

8. In parallel communication, if the time interval to transmit one bit is 10μs. What is the time to transmit an 8-bit word?

9. Which of the following is not an advantage of NDB?

10. Which of the following is false with respect to AIRNIC?

11. Which of the following uses lens and mirrors for focusing?

12. What is the approximate time taken by the GPS for one complete orbit?

13. Which of the following uses a monitoring system to check the function of channels?

14. A Janus configuration has less error than a non-Janus configuration.

15. The ratio between the modulating signal voltage and the carrier voltage is called?

16. Why is there a huge spectrum space between the transmitted and received signal in satellite communication?

17. What is the reason for choosing height error gain in such a way that the frequency of height loop is below the bandwidth of the pitch attitude loop?

18. What is the duty cycle of a square wave with equal duration positive and negative alterations?

19. Whisper shout is used to avoid garble in TCAS.

20. ________ related ranging errors to the dispersion in measured position?

21. Which of the following are not controlled by the HUD processor?

22. The radiation from an open line can be increased by bending to which of the following angle?

23. What type of receivers converts all incoming frequency into a lower frequency for better selectivity and sensitivity?

24. What is the type of receiver used for marker beacon?

25. What is the modulation index of a system with modulating frequency 75kHz and maximum frequency deviation 15kHz?

26. What is the maximum altitude that can be measured using a radio altimeter?

27. Speed of transmission is increased by channel encoding.

28. What is the alias produced when a signal of 15 MHz is sampled at a rate of 28 MHz?

29. Which type of direction finders takes bearings on airborne transmitters and advice the aircraft of its bearing from the ground station?

30. What is the frequency of operation of weather radar?

31. In a parasitic array the elements are shorted if they are connected to a conducting beam.

32. Which of the following instruments use the pitot-static probe for its input?

33. What is the gain required by a weather radar antenna?

34. Why is the static source errors compensated in helicopters?

35. What should be the gain of an amplifier to have zero voltage loss if the signal is already attenuated half that of the original signal?

36. Selectivity in a DSP is better than its analog equivalent.

37. Which type of gyros works by calculating the difference in time taken by light to travel in a closed circle?

38. ______ is used to provide continuous tuning over the desired range?

39. What is the number of beams that a Doppler radar uses?

40. Which of the following spinning wheel gyro has an accuracy of 0.001 deg/hr?

41. Which of the following is not one of the functions performed by the FMS?

42. Both AESA and PESA are ________ radars?

43. Multiplexing increases the number of communication channels for transmission.

44. What happens if a satellite is launched vertically and released at its design altitude?

45. How is data staleness overcome?

46. What should be the value of R2 to have an attenuation of 0.5, if R1=200Ω?

47. Which of the following is not a result of digital implementation?

48. The factor by which a receiver fails to reach the theoretical internal noise limit is known as ________

49. What are the factors that affect signal propagation speed assuming no noise?

50. Avionics Full Duplex Switched Ethernet provides flexibility to manage any change in the data communication between the connected systems without wiring modifications.