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What clouds have the greatest turbulence?
Cumulonimbus. Cumulonimbus are always the worst cloud to get near or into
Cumulonimbus.
See lessCumulonimbus are always the worst cloud to get near or into
Every physical process of weather is accompanied by, or is the result of, a
heat exchange. The sun (or heat exchange) is the primary reason for every physical process of weather on the planet.
heat exchange.
See lessThe sun (or heat exchange) is the primary reason for every physical process of weather on the planet.
What are the standard temperature and pressure values for sea level?
15°C and 29.92" Hg. Rote memory item: 15°C and 29.92 in Hg or 59°F and 1013.2 millibars.
15°C and 29.92″ Hg.
See lessRote memory item: 15°C and 29.92 in Hg or 59°F and 1013.2 millibars.
Which combination of atmospheric conditions will reduce aircraft takeoff and climb performance?
High temperature, high relative humidity, and high density altitude. Density altitude increases with an increase in temperature, a decrease in pressure, and/or an increase in humidity.
High temperature, high relative humidity, and high density altitude.
See lessDensity altitude increases with an increase in temperature, a decrease in pressure, and/or an increase in humidity.
What effect, if any, does high humidity have on aircraft performance?
It decreases performance. Humidity will have the same effect as low pressure or high temperature, aka it will increase the density altitude and affect performance negatively.
It decreases performance.
See lessHumidity will have the same effect as low pressure or high temperature, aka it will increase the density altitude and affect performance negatively.
What effect does high density altitude, as compared to low density altitude, have on propeller efficiency and why?
Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes. Density Altitude is the altitude corrected for non-standard pressure and non-standard temperatures. A high density altitude means your UAS will "feel" like it's operating at a higheRead more
Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes.
See lessDensity Altitude is the altitude corrected for non-standard pressure and non-standard temperatures. A high density altitude means your UAS will “feel” like it’s operating at a higher altitude, hence the performance will be diminished.
What effect does high density altitude have on the efficiency of a UA propeller?
Propeller efficiency is decreased. Density Altitude is the altitude corrected for non-standard pressure and non-standard temperatures. A high density altitude means your UAS will "feel" like it's operating at a higher altitude, hence the performance will be diminished.
Propeller efficiency is decreased.
See lessDensity Altitude is the altitude corrected for non-standard pressure and non-standard temperatures. A high density altitude means your UAS will “feel” like it’s operating at a higher altitude, hence the performance will be diminished.
How would high density altitude affect the performance of a small unmanned aircraft?
Decreased performance. Density Altitude is the altitude corrected for non-standard pressure and non-standard temperatures. A high density altitude means your UAS will "feel" like it's operating at a higher altitude, hence the performance will be diminished.
Decreased performance.
See lessDensity Altitude is the altitude corrected for non-standard pressure and non-standard temperatures. A high density altitude means your UAS will “feel” like it’s operating at a higher altitude, hence the performance will be diminished.
Which of the following considerations is more relevant to a Remote PIC when evaluating unmanned aircraft performance?
Current weather conditions. The current weather will dictate the performance of the aircraft. Density altitude is affected by temperature and pressure changes.
Current weather conditions.
See lessThe current weather will dictate the performance of the aircraft. Density altitude is affected by temperature and pressure changes.
Which factor would tend to increase the density altitude at a given airport?
An increase in ambient temperature. Density altitude increases with an increase in temperature, a decrease in pressure, and/or an increase in humidity.
An increase in ambient temperature.
Density altitude increases with an increase in temperature, a decrease in pressure, and/or an increase in humidity.
See less