Atmosphere and Aerodynamics Quiz

What is the primary gas in the Earth's atmosphere by volume?

• Nitrogen

• Carbon Dioxide

• Oxygen

• Argon

Which layer of the atmosphere is characterized by decreasing temperatures with height?

• Thermosphere

• Troposphere

• Stratosphere

• Mesosphere

At what altitude does the atmospheric pressure drop to about one hPa?

• 50 km

• 30 km

• 20 km

• 10 km

What is the standard sea-level pressure in hPa?

• 1013.25 hPa

• 980 hPa

• 1000 hPa

• 1020 hPa

Which of the following is a force acting on an airplane?

• Weight

• Lift

• Gravity

• Thrust

What does the angle of attack (AOA) refer to?

• The angle of descent during landing

• The angle between the chord line and the airflow

• The angle between the wing and the fuselage

• The angle of the aircraft's nose to the horizon

Which principle explains the generation of lift on an airfoil?

• Archimedes' Principle

• Pascal's Law

• Newton's Third Law

• Bernoulli's Principle

What is the primary characteristic of a symmetric airfoil?

• Used primarily for supersonic flight

• Higher drag than cambered airfoils

• Same shape and curvature on both surfaces

• Different upper and lower surfaces

What happens to air density as altitude increases?

• It increases

• It remains constant

• It decreases

• It fluctuates randomly

Which layer of the atmosphere contains most of the mass?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere