Aircraft Fundamentals Quiz 1

The earth’s atmosphere is composed of which of the following gases?

• 78% nitrogen and 21% oxygen.

• 78% argon and 21% oxygen

• 21% nitrogen and 78% oxygen.

At sea level, the air exerts a pressure of what?

• 14.7 PSI.

• 7.34 PSI.

• 15.69 PSI.

Standard atmospheric pressure can support a column of mercury that is 29.92 inches tall

• True

• False

Select from the following the standard temperature for all aerodynamic computations?

• 15*C

• 59*F

• Both are True

The temperature at which the air reaches a state where it can hold no more water is?

• Absolute humidity.

• Relative humidity.

• Dew Point

During flight, there are four forces acting on an airplane.

They are lift, weight (gravity), thrust, and drag

• True

• False

Which of the following states Bernoulli’s principle?

• As the velocity of a fluid (air) increases, its internal pressure decreases.

• As the velocity of a fluid (air) increases, its internal pressure increases.

• As the velocity of a fluid (air) decreases, its internal pressure stays the same

The chord line of an aircraft airfoil is an imaginary straight line drawn through an airfoil from the leading edge to the trailing edge.

• True

• False

The three axes of an aircraft are what?

• Longitudinal, Vertical, and Lateral.

• Horizontal, Left, and Right.

• Pitch, Roll, and He-Haw.

• Pitch, Roll, Yaw

What happens to the air density as altitude decreases?

• Only temperature changes density

• It remains the same

• It decreases

• It increases