PPLGS Module 01

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?

• 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.

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

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

•  During unaccelerated flight.

• When the aircraft is accelerating.

• When the aircraft is at rest on the ground.

Select the four flight fundamentals involved in maneuvering an aircraft.

• Aircraft power, pitch, bank, and trim.

• Starting, taxiing, takeoff, and landing.

•  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 1 and 2.

• Corners 2 and 4.

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 touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point.

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

When executing an emergency approach to land in a single-engine airplane, it is important to maintain a constant glide speed because variations in glide speed

• increase the chances of shock cooling the engine.

• assure the proper descent angle is maintained until entering the flare.

• nullify all attempts at accuracy in judgment of gliding distance and landing spot.

The acute angle A is the angle of

• incidence.

•  attack.

• 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 the horizon.

• formed by the longitudinal axis of the airplane and the chord line of the wing.