CPL Aerodynamics and Aircraft Systems 2

Question 1

What is a phugoid oscillation?

Accepted Answer

A long-period oscillation in pitch where the aircraft trades airspeed for altitude

Answer

A rapid, short-period pitch oscillation caused by turbulence

Answer

A lateral-directional oscillation involving roll and yaw coupling

Answer

An oscillation in the landing gear hydraulic system under load

Question 2

Dutch roll is an oscillatory motion that primarily couples which two axes?

Accepted Answer

Roll and yaw

Answer

Pitch and roll

Answer

Pitch and yaw

Answer

Roll and lateral translation

Question 3

If an aircraft enters a 60-degree banked level turn, the stall speed increases by a factor of approximately:

Accepted Answer

1.41

Answer

1.2

Answer

1.73

Answer

2.0

Question 4

What aerodynamic phenomenon causes adverse yaw during a roll input?

Accepted Answer

The down-going aileron produces more induced drag than the up-going aileron

Answer

The up-going aileron produces more parasite drag than the down-going aileron

Answer

Increased lift on the rising wing reduces its induced drag

Answer

P-factor shifts the thrust line during the roll

Question 5

In ground effect, induced drag is reduced primarily because:

Accepted Answer

The ground interrupts wingtip vortex formation, reducing downwash and induced drag

Answer

Airspeed is higher close to the ground due to surface friction

Answer

Parasite drag increases to compensate for reduced profile drag

Answer

The angle of attack is automatically reduced by the aircraft's proximity sensors

Question 6

P-factor (asymmetric blade effect) is most pronounced in a single-engine propeller aircraft when:

Accepted Answer

At a high angle of attack with the propeller developing significant thrust

Answer

At cruise altitude with high RPM and low airspeed

Answer

During a dive at maximum airspeed

Answer

During cruise flight with the propeller at low pitch

Question 7

The 'coffin corner' refers to the flight envelope condition where:

Accepted Answer

The low-speed buffet and high-speed buffet margins converge at high altitude

Answer

The structural limit speed and stall speed converge at high altitude

Answer

Maximum operating altitude and minimum safe altitude are both exceeded

Answer

Fuel starvation and hydraulic failure occur simultaneously