Principle of Flight Quiz

1.Regarding a positively cambered aerofoil section, which statement is correct?

1) The angle of attack has a negative value when the lift coefficient equals zero.

2) A nose up pitching moment exists when the lift coefficient equals zero

• 1) incorrect, 2) incorrect.

• 1) correct, 2) correct.

• 1) incorrect, 2) correct.

• 1) correct, 2) incorrect

Which statement about propeller noise is correct? 1) Propeller noise increases when the blade tip speed increases. 2) For a given engine and propeller blade shape, a decrease in the number of propeller blades allows for a reduction in propeller noise.

• 1) is incorrect, 2) is correct.

• 1) is correct, 2) is correct.

• 1) is correct, 2) is incorrect.

• 1) is incorrect, 2) is incorrect

Considering subsonic incompressible airflow through a Venturi, which statement is correct? 1) The dynamic pressure in the throat is the same as in the undisturbed airflow. 2) The total pressure in the throat is higher than in the undisturbed airflow.

• 1) is correct, 2) is incorrect.

• 1) is incorrect, 2) is correct.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is incorrect

Which of these statements about the gust load factor on an aeroplane are correct or incorrect? 1) When the wing area decreases, the gust load factor decreases. 2) When the EAS decreases, the gust load factor decreases.

• 1) is correct, 2) is correct.

• 1) is correct, 2) is incorrect.

• 1) is incorrect, 2) is correct.

• 1) is incorrect, 2) is incorrect

Which statement is correct? 1) Propeller gyroscopic effect occurs during flight at constant aeroplane attitude. 2) Propeller gyroscopic effect is most noticeable during low speed flight at low propeller RPM.

• 1) is incorrect, 2) is correct.

• 1) is incorrect, 2) is incorrect.

• 1) is correct, 2) is correct.

• 1) is correct, 2) is incorrect.

Which of the following statements is correct?

1) When the critical engine fails during take-off the speed VMCL can be limiting.

2) The speed VMCL is always limited by maximum rudder deflection.

• 1) is incorrect, 2) is incorrect.

• 1) is correct, 2) is incorrect.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is correct.

Considering subsonic incompressible airflow through a Venturi, which statement is correct?

1) The dynamic pressure in the throat is lower than in the undisturbed airflow.

2) The total pressure in the throat is lower than in the undisturbed airflow.

• 1) is correct, 2) is incorrect.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is incorrect.

• 1) is incorrect, 2) is correct

Which statement about propeller icing is correct?

1) Propeller icing increases blade element drag and reduces blade element lift.

2) Propeller icing reduces propeller efficiency.

• 1) is incorrect, 2) is correct.

• 1) is correct, 2) is incorrect.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is incorrect

Which statement about propeller noise is correct?

1) Propeller noise decreases when the blade tip speed increases.

2) For a given engine and propeller blade shape, an increase in the number of propeller blades allows for a reduction in propeller noise.

• 1) is incorrect, 2) is incorrect.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is correct.

• 1) is correct, 2) is incorrect.

With increasing altitude and constant IAS the static lateral stability (i) and the dynamic lateral/directional stability (ii) of an aeroplane with swept back wing will:

• i) increase; ii) increase.

• i) increase; ii) decrease.

• i) decrease; ii) decrease.

• i) decrease; ii) increase.