Free Bachelor of Aviation Theory of Flight Questions and Answers

Question 1

A wing's angle of attack is the angle that the chord creates with:

Accepted Answer

The relative airflow

Answer

The angle of attack is a critical aerodynamic parameter that defines the angle between the wing's chord line and the direction of the oncoming air. The chord line is an imaginary straight line connecting the leading and trailing edges of the wing. This angle is crucial as it directly influences the amount of lift and drag generated by the wing.

Question 2

A wing's lift force acts at a 90-degree angle to:

Accepted Answer

The relative airflow

Answer

Lift is defined as the component of the aerodynamic force that acts perpendicular to the direction of the relative airflow. This means that if the air is flowing horizontally, the lift force acts vertically upwards. This fundamental relationship ensures that lift is always oriented to oppose the aircraft's weight, enabling flight.

Question 3

The term for a wing's effectiveness is the

Accepted Answer

Lift/Drag ratio

Answer

The Lift/Drag ratio (L/D ratio) is a primary indicator of a wing's or aircraft's aerodynamic efficiency. It quantifies how much lift is generated for every unit of drag produced. A higher L/D ratio signifies greater effectiveness, meaning the aircraft can fly further or stay airborne longer with less power, making it a direct measure of performance.

Question 4

At the point of the limitation in a fluid's path when it passes through a tube with a venturi, the fluid:

Accepted Answer

Reduces in pressure

Answer

According to Bernoulli's Principle, when an incompressible fluid flows through a constricted section of a tube, like a venturi, its velocity increases. To maintain the conservation of energy, this increase in kinetic energy must be accompanied by a corresponding decrease in the fluid's static pressure. Therefore, at the narrowest point of the venturi, the fluid experiences a reduction in pressure.

Question 5

Increasing a wing's angle of attack until it sinks the least will:

Accepted Answer

Increase lift and reduce drag

Answer

Increasing a wing's angle of attack up to a certain point will increase lift. For minimum sink rate, an aircraft is typically flying at its best Lift/Drag ratio, which means it is generating the most lift for the least amount of drag. This optimal condition allows the aircraft to descend at the slowest possible rate, effectively increasing lift relative to drag.

BAvn Bachelor of Aviation Practice Test

BAvn Bachelor of Aviation Practice Test

Free Bachelor of Aviation Theory of Flight Questions and Answers