Question 1

What are the four forces acting on an aeroplane in flight?

Accepted Answer

Thrust, drag, lift, and weight.

Answer

Thrust, drag, lift, and gravity.

Answer

Thrust, drag, lift, and inertia.

Answer

Thrust, drag, lift, and pressure.

Question 2

What happens when thrust is greater than drag?

Accepted Answer

The aeroplane accelerates.

Answer

The aeroplane climbs.

Answer

The aeroplane decelerates.

Answer

The aeroplane remains in equilibrium.

Question 3

What is the primary function of an airfoil?

Accepted Answer

To create lift.

Answer

To stabilize the aeroplane.

Answer

To increase thrust.

Answer

To reduce drag.

Question 4

According to Bernoulli's Principle, what happens to pressure as air accelerates over the wing's upper surface?

Accepted Answer

Pressure decreases.

Answer

Pressure increases.

Answer

Pressure fluctuates.

Answer

Pressure remains constant.

Question 5

What is relative airflow?

Accepted Answer

The airflow created by the motion of the aeroplane through the air.

Answer

The airflow created by the wing's angle of attack.

Answer

The airflow created by wind speed.

Answer

The airflow created by the engine's thrust.

Question 6

What happens to the centre of pressure as the angle of attack increases up to the stalling angle?

Accepted Answer

It moves forward.

Answer

It moves backward.

Answer

It disappears.

Answer

It remains stationary.

Question 7

What is the primary purpose of thrust in an aeroplane?

Accepted Answer

To provide forward motion.

Answer

To stabilize the aeroplane.

Answer

To increase lift.

Answer

To reduce drag.

Question 8

What is parasite drag?

Accepted Answer

Drag caused by parts of the aeroplane that do not contribute to lift.

Answer

Drag caused by the engine.

Answer

Drag caused by the wing's angle of attack.

Answer

Drag caused by parts of the aeroplane that produce lift.

Question 9

How can induced drag be reduced?

Accepted Answer

By designing wings with high aspect ratios.

Answer

By streamlining the fuselage.

Answer

By reducing the wing area.

Answer

By increasing the angle of attack.

Question 10

What is the purpose of streamlining?

Accepted Answer

To minimize drag.

Answer

To increase thrust.

Answer

To increase lift.

Answer

To reduce weight.

Question 11

What is the purpose of frise and differential ailerons?

Accepted Answer

To reduce aileron drag.

Answer

To increase thrust.

Answer

To stabilize the aeroplane.

Answer

To increase lift.

Question 12

What is the transition point in the boundary layer?

Accepted Answer

The point where the boundary layer becomes turbulent.

Answer

The point where the boundary layer separates from the wing.

Answer

The point where the boundary layer becomes laminar.

Answer

The point where the boundary layer increases drag.

Question 13

What is the purpose of vortex generators?

Accepted Answer

To reduce drag by re-energizing the boundary layer

Answer

To increase thrust

Answer

To increase lift

Answer

To stabilize the aeroplane

Question 14

What happens if weight is ahead of lift?

Accepted Answer

The aeroplane's nose turns down

Answer

The aeroplane accelerates

Answer

The aeroplane's nose turns up

Answer

The aeroplane remains in equilibrium

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