# Air Data Equations MCQ’s

This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Air Data Equations”.

1. What is the height called when the standard temperatures are used?
a) Standard altitude
b) Constant altitude
c) Pressure altitude
d) Total altitude

2. Which of the following altitude is measured by the pitot-static tube?
a) Standard altitude
b) Constant altitude
c) Pressure altitude
d) Total altitude

3. Which of the following is used to obtain the altitude from the static pressure?
a) International atmospheric data
b) Standard atmospheric model
c) International atmospheric tables
d) Standard atmospheric tables

4. Why is it dangerous to fly over hilly areas with pressure altitude?
a) Affected by temperature
b) Not reliable
c) Costly
d) Not the true altitude

5. Which are the factors that mach number does not depend on?
a) Static pressure
b) Stagnation pressure
c) Static temperature
d) Thrust produced by the aircraft

6. Why is heating necessary in pitot-static tube?
a) Ice formation
b) Force the flow away from tube
c) Force the flow towards the flow
d) Increase the sensitivity

7. What does the altitude rate essentially tell us?
a) Vertical speed
b) Rate of climb
c) Rate of glide
d) Rate of decent

8. Why are retractable pitot tubes used in stealth planes?
a) Aerodynamically efficient
b) Stealth configuration
c) Error values in supersonic speeds
d) Use GPS for speed and altitude

9. Calibrated speed is the actual speed of the aircraft relative to the wind.
a) True
b) False

10. Where will the measurements of static pressure be most accurate?
a) Nose of the aircraft
b) Tail of the aircraft
c) Wing tips of the aircraft
d) Trailing cone

11. Density altitude is the standard parameter for vertical navigation.
a) True
b) False

12. What is the speed of the aircraft relative to the ground called as?
a) Relative speed
b) Inertial speed
c) Ground speed
d) True airspeed

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