Part 107 Loading and Weather

The term "angle of attack" is defined as the angle between the

• chord line of the wing and the relative wind.

• airplanes longitudinal axis and that of the air striking the airfoil.

• airplane's centerline and the relative wind.

What is the relationship of lift, drag, thrust, and weight when the airplane is in straight-and-level flight?

• Lift equals weight and thrust equals drag.

• Lift, drag, and weight equal thrust.

• Lift and weight equal thrust and drag.

The amount of excess load that can be imposed on the wing of an airplane depends upon the

• position of the CG.

• speed of the airplane.

• abruptness at which the load is applied.

Which basic flight maneuver increases the load factor on an airplane as compared to straight-and-level flight?

• Climbs.

• Turns.

• Stalls.

What effect does high density altitude, as compared to low density altitude, have on propeller efficiency and why?

• Efficiency is increased due to less friction on the propeller blades.

• Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes.

• Efficiency is reduced due to the increased force of the propeller in the thinner air.

What is density altitude?

• The height above the standard datum plane.

• The pressure altitude corrected for non-standard temperature.

• The altitude read directly from the altimeter.

What effect does high density altitude have on aircraft performance?

• It increases engine performance.

• It reduces climb performance.

• It increases takeoff performance.

What effect, if any, does high humidity have on aircraft performance?

• It increases performance.

• It decreases performance.

• It has no effect on performance.

Under what condition is pressure altitude and density altitude the same value?

• At sea level, when the temperature is 0 °F.

• When the altimeter has no installation error.

• At standard temperature.

Which factor would tend to increase the density altitude at a given airport?

• An increase in barometric pressure.

• A decrease in relative humidity.

• An increase in ambient temperature.