Unit 3 Exam Review

______ decreases at 1”Hg per 1,000 foot increase in altitude.

• Barometric pressure

• Density pressure

• True altitude

• Measured pressure altitude

Viscosity is a fluid’s resistance to ______.

• friction

• light

• flow

• heat

What are the standard temperature and pressure values for sea level?

• 15 degrees C and 29.92” Hg.

• 59 degrees C and 1013.2 millibars

• 59 degrees C and 29.92” Hg.

• 0 degrees C and 1013.2 millibars

Knowing the pressure altitude is important to aircraft performance because it can be used as a tool to arrive at ______ .

• humidity

• air temperature

• wind speed

• density altitude

Pressure altitude corrects for the difference between _______ and standard pressure.

• humidity

• density altitude

• barometric pressure

• standard temperature

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

• decrease in ambient temperature

• increase in barometric pressure

• decrease in relative humidity

• increase in ambient temperature

Pressure altitude is calculated from (29.92 - 28.92) × 1,000 + 3,500. What information do these numbers give?

• The barometric pressure is 29.92 "Hg and the elevation is 1,000 feet.

• The barometric pressure is 28.92 "Hg and the elevation is 1,000 feet.

• The barometric pressure is 29.92 "Hg and the elevation is 3,500 feet.

• The barometric pressure is 28.92 "Hg and the elevation is 3,500 feet.

Which of the following are units of measure for atmospheric pressure? Select all that apply. (3.A.2)

• feet per second (ft/s)

• square centimeters (cm²)

• millibars (mb)

• pounds per square inch (psi)

• inches of mercury (Hg)

Which combination of atmospheric conditions will reduce takeoff and climb performance? (3.B.1 and 3.A.2)

• Low temperature, low relative humidity, and low density altitude

• High temperature, low relative humidity, and low density altitude

• Low temperature, high relative humidity, and high density altitude

• High temperature, high relative humidity, and high density altitude

Which statement is true about an object moving through a fluid? (3.A.1)

• Viscosity changes according to the size of the object.

• The object moves faster if the fluid is more viscous.

• Fluid friction increases as the object's velocity increases.

• Less viscosity means more fluid friction.