locofly 39-41

Which factor would likely increase density altitude?

• 
  An increase in barometric pressure.

• An increase in ambient temperature.

• A decrease in relative humidity

If the outside air temperature (OAT) at a given altitude is warmer than standard, the density altitude is

• 
  higher than pressure altitude.

• lower than pressure altitude.

• 
  equal to pressure altitude.

What is the standard air temperature and pressure at sea level?

• 
  17º C 1013 millibars

• 
  15º C 29.92” Hg

• 
  59º C 1013 millibars

What effect does high density altitude have on the efficiency of a UA propeller?

• 
  Density altitude does not affect propeller efficiency.

• 
  Propeller efficiency is decreased.

• Propeller efficiency is increased.

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

• 
  It decreases performance

• It increases performance.

• 
  It has no effect on performance.

What is true altitude?

• 
  The height above the surface.

• 
  The vertical distance of the aircraft above the surface.

• 
  The vertical distance of the aircraft above sea level.

How would high density altitude affect the performance of a small unmanned aircraft?

• 
  Increased performance

• Decreased performance

• 
  No change in performance

Density altitude is defined by

• 
  humidity and braking friction forces.

• pressure altitude and ambient temperature.

• 
  headwind and landing weight.

When is pressure altitude equal to density altitude?

• 
  On a standard day (15º C and 29.92” Hg)

• 
  When advection fog is present

• 
  When the temperature and dew point are beginning to converge

Which combination of atmospheric conditions will reduce aircraft takeoff and climb performance?

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

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

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