Aerospace & Aeronautical Engineering

Avionics MCQ (Interview-Exam) Question-Answer – Head Up Displays

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Avionics MCQ (Interview-Exam) Question-Answer - Head Up Displays

Q.1 Which one of the following flight parameters are not present in a typical commercial head up display?

       A. Altitude

       B. Throttle position

       C. Airspeed

       D. Heading

Ans : Throttle position

Q.2 Which of the following is true with respect to Head up display?

       A. Assimilate the flight data without looking at any kind of display panel

       B. Using a head up display a pilot and view and assimilate the flight data in all 360°

       C. View and assimilate the flight data with his head up in a transparent display

       D. View and assimilate the flight data that is projected on the helmet

Ans : View and assimilate the flight data with his head up in a transparent display

Q.3 What are the sensors used in combination with a raster mode HUD?

       A. LIDAR

       B. Microwave radar

       C. GPS

       D. Radar and FLIR (Forward Looking InfraRed)

Ans : Radar and FLIR (Forward Looking InfraRed)

Q.4 The main reason for using a collimated display in HUD is ________.

       A. Wide view of display

       B. Fast screen refresh rates

       C. More information can be displayed

       D. Information displayed is focused at infinity

Ans : Information displayed is focused at infinity

Q.5 The Instantaneous FOV (Field Of Vision) changes with the position of view.

       A. False

       B. True

Ans : True

Q.6 Which of the following is the correct order for the path of light in a HUD?

       A. CRT -> collimating lens -> mirror -> combiner glass -> pilot

       B. Collimating lens -> CRT -> mirror -> combiner glass -> pilot

       C. CRT -> mirror -> collimating lens -> combiner glass -> pilot

       D. CRT -> mirror -> combiner glass -> collimating lens -> pilot

Ans : CRT -> mirror -> collimating lens -> combiner glass -> pilot

Q.7 Which of the following are not controlled by the HUD processor?

       A. Brightness level and contrast level

       B. Computing flight parameters

       C. Power supply to HUD

       D. Symbol and font generation

Ans : Computing flight parameters

Q.8 What is the IFOV for a collimating lens of diameter 100mm, the distance between the collimating lens and combiner glass=50mm, the distance between pilot eyes and combiner glass=400mm?

       A. 12.6°

       B. 14.2°

       C. 25.0°

       D. 28.0°

Ans : 12.6°

Q.9 What is the reason for using CRT used instead of LCD or LED displays?

       A. Cheap to manufacture

       B. Lightweight

       C. To meet the required brightness level

       D. Low energy of operation

Ans : To meet the required brightness level

Q.10 What is the contrast ratio of real world image to the CRT display image?

       A. 4:1

       B. 2:1

       C. 1:1

       D. 7:3

Ans : 7:3


Head-Up Displays (HUDs) play a crucial role in aerospace and aeronautical engineering, enhancing the pilot’s situational awareness and reducing workload during flight. Here are some key points about the Head-Up Displays in this context:

1. Introduction to HUDs : Head-Up Displays are transparent screens that display essential flight information directly in the pilot’s line of sight, allowing them to maintain focus on the external environment while accessing critical data.

2. Primary Flight Information : HUDs provide key flight parameters such as airspeed, altitude, attitude, heading, and navigation information. This enables pilots to receive crucial data without having to look down at traditional cockpit instruments.

3. Enhanced Situational Awareness : By projecting information onto the windshield or a separate combiner glass, HUDs enhance situational awareness by overlaying critical data onto the pilot’s view of the outside world.

4. Flight Path Vector (FPV) : HUDs often incorporate a Flight Path Vector, a graphical representation of the aircraft’s trajectory. This helps pilots anticipate the aircraft’s path and make informed decisions during different phases of flight.

5. Integration with Avionics Systems : HUDs are integrated with the aircraft’s avionics systems, receiving real-time data from various sensors and avionics components. This integration ensures accuracy and reliability in the displayed information.

6. Night Vision Capabilities : Many modern HUDs are equipped with night vision technology, allowing pilots to see essential information in low-light conditions. This is particularly beneficial for military and civil aviation operations during nighttime.

7. Military Applications : In military aviation, HUDs play a critical role in displaying targeting information, weapon status, and other mission-critical data. This assists pilots in making split-second decisions during combat scenarios.

8. Reduced Head-down Time : HUDs significantly reduce the time pilots spend looking down at instruments, minimizing the risk of losing situational awareness. This is especially important during critical phases of flight, such as takeoff and landing.

9. Training and Simulation : HUDs are often used in training simulators to replicate real-world flying conditions. This allows pilots to practice using the HUD interface and become proficient in interpreting the displayed information.

10. Advancements and Future Trends : Ongoing research and development in aerospace engineering continue to improve HUD technology. Advancements may include augmented reality displays, expanded functionalities, and integration with emerging technologies like artificial intelligence.

Head-Up Displays are integral to aerospace and aeronautical engineering, contributing to safer and more efficient flight operations by providing pilots with essential information in an easily accessible manner.

Aerospace & Aeronautical Avionics MCQ Head Up Displays



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