7.5: Icing Flashcards
One in-flight condition necessary for structural icing to form is
A. small temperature/dewpoint spread.
B. stratiform clouds.
C. visible moisture.
visible moisture.
In which environment is aircraft structural ice most likely to have the highest accumulation rate?
A. Cumulus clouds with below freezing temperatures.
B. Freezing drizzle.
C. Freezing rain.
Freezing rain.
The presence of ice pellets at the surface is evidence that there
A. are thunderstorms in the area.
B. has been cold frontal passage.
C. is a temperature inversion with freezing rain at a higher altitude.
is a temperature inversion with freezing rain at a higher altitude.
How will frost on the wings of an airplane affect takeoff performance?
A. Frost will disrupt the smooth flow of air over the wing, adversely affecting its lifting capability.
B. Frost will change the camber of the wing, increasing its lifting capability.
C. Frost will cause the airplane to become airborne with a higher angle of attack, decreasing the stall speed.
Frost will disrupt the smooth flow of air over the wing, adversely affecting its lifting capability.
Why is frost considered hazardous to flight?
A. Frost changes the basic aerodynamic shape of the airfoils, thereby increasing lift.
B. Frost slows the airflow over the airfoils, thereby increasing control effectiveness.
C. Frost spoils the smooth flow of air over the wings, thereby decreasing lifting capability.
Frost spoils the smooth flow of air over the wings, thereby decreasing lifting capability.
How does frost affect the lifting surfaces of an airplane on takeoff?
A. Frost may prevent the airplane from becoming airborne at normal takeoff speed.
B. Frost will change the camber of the wing, increasing lift during takeoff.
C. Frost may cause the airplane to become airborne with a lower angle of attack at a lower indicated airspeed.
Frost may prevent the airplane from becoming airborne at normal takeoff speed.
Which conditions result in the formation of frost?
A. The temperature of the collecting surface is at or below freezing when small droplets of moisture fall on the surface.
B. The temperature of the collecting surface is at or below the dewpoint of the adjacent air and the dewpoint is below freezing.
C. The temperature of the surrounding air is at or below freezing when small drops of moisture fall on the collecting surface.
The temperature of the collecting surface is at or below the dewpoint of the adjacent air and the dewpoint is below freezing.
