Aerodynamics Quiz 1-40

The four forces acting on an airplane in flight are

• Lift, weight, thrust, and drag

• Lift, weight, gravity, and thrust

• Lift, gravity, power, and friction

Which statement relates to Bernoulli’s principle?

• air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface

• For every action there is an equal and opposite reaction

• An additional upward force is generated as the lower surface of the airfoil deflects air downward

When are the four forces that act on an airplane in equilibrium?

• When the aircraft is accelerating

• When the aircraft is at rest on the ground

• During unaccelerated flight

Select the four flight fundamentals involved in the maneuvering an aircraft

• Starting, taxiing, takeoff, and landing

• Aircraft power, pitch, bank, and trim

• Straight-and-level flight, turns, climbs, and descents

In flying the rectangular course, when would the aircraft be turned less than 90°?

• Corners 1 and 4

• Corners 2 and 4

• Corners 1 and 2

While practicing S-turns, a consistently smaller half-circle is made on one side of the road than on the other, and this turn is not completed before crossing the road or reference line. This would most likely occur in turn

• 1-2-3 because the bank is decreased too rapidly during the latter part of the turn

• 4-5-6 because the bank is increased too rapidly during the early part of the turn

• 4-5-6 because the bank is increased too slowly during the latter part of the turn

If an emergency situation requires a downwind landing, pilots should expect a faster

• Airspeed at touchdown, a longer ground roll, and better control throughout the landing roll

• Groundspeed at the touchdown, a shorter ground roll, and the likelihood of undershooting the desired touchdown point

• Groundspeed at the touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point

The acute angle A is the angle of

• Attack

• Incidence

• Dihedral

The term ‘angle of attack’ is defined as the angle

• Between the wing chord line and the relative wind

• Between the airplane’s climb angle and horizon

• Formed by the longitudinal axis of the airplane and the chord line of the wing

The angle between the chord line of an airfoil and the relative wind is known as the angle of

• Lift

• Attack

• Incidence