CPL Aerodynamics 2

Question 1

Which factor primarily determines the critical angle of attack for a given airfoil?

Accepted Answer

Airfoil shape and camber

Answer

Airspeed

Answer

Aircraft gross weight

Answer

Flap setting

Question 2

What happens to induced drag when an aircraft's airspeed is doubled at the same altitude and weight?

Accepted Answer

It is reduced to one-quarter

Answer

It doubles

Answer

It quadruples

Answer

It remains unchanged

Question 3

Ground effect reduces induced drag primarily because it:

Accepted Answer

Restricts the formation of wingtip vortices

Answer

Increases air density below the wing

Answer

Increases the effective angle of attack

Answer

Reduces parasite drag

Question 4

An aircraft experiencing 'Dutch roll' is showing instability about which axes?

Accepted Answer

Lateral and vertical simultaneously

Answer

Longitudinal and vertical

Answer

Lateral only

Answer

Longitudinal only

Question 5

What is the effect of increasing aspect ratio on an aircraft's aerodynamic efficiency?

Accepted Answer

Reduces induced drag

Answer

Increases parasite drag

Answer

Reduces lift coefficient

Answer

Increases stall speed

Question 6

Which condition most accurately describes 'coffin corner' in high-altitude flight?

Accepted Answer

The margin between Mmo and Vs narrows until they converge

Answer

The autopilot disengages at high altitude

Answer

Cabin pressurization becomes ineffective

Answer

Engine thrust exceeds structural limits

Question 7

Dihedral in a wing design primarily provides stability about which axis?

Accepted Answer

Longitudinal (roll)

Answer

Vertical (yaw)

Answer

Lateral (pitch)

Answer

All three axes equally