Welcome to your Private Pilot – Chapter 8 Name Email What effect, if any, does high humidity have on aircraft performance? It increases performance. It decreases performance. It has no effect on performance. What fuel flow should a pilot expect at 11,000 feet on a standard day with 65 percent maximum continuous power? 10.6 gallons per hour. 11.2 gallons per hour. 11.8 gallons per hour. Determine the approximate landing ground roll distance. (READ THE NOTES!) Pressure altitude.................Sea level Headwind..............................4 kts Temperature.............................Std 356 feet. 401 feet. 490 feet. Determine the approximate landing ground roll distance. (READ THE NOTES!) Pressure altitude......................5,000 ft Headwind...................................Calm Temperature..............................101 °F 445 feet. 495 feet. 545 feet. Which combination of atmospheric conditions will reduce aircraft takeoff and climb performance? Low temperature, low relative humidity, and low density altitude. High temperature, low relative humidity, and low density altitude. High temperature, high relative humidity, and high density altitude. What is density altitude? The height above the standard datum plane. The pressure altitude corrected for non-standard temperature. The altitude read directly from the altimeter. Determine the total distance required to land over a 50-foot obstacle. Pressure altitude.........................3,750 ft Headwind....................................12 kts Temperature....................................Std 816 feet. 794 feet. 836 feet. It’s a warm summer day and you are planning a flight through a mountain pass at 11,500 feet MSL. Your aircraft’s service ceiling is 14,000 feet. You have calculated the density altitude through the mountain pass will be 14,800 feet. An appropriate course of action would be? Density altitude only matters for takeoff and landing. Proceed as planned. Change your flight plan route so that you do not exceed the service ceiling of the aircraft. Proceed as planned as the warm air will help you get the extra elevation need to cross through the pass. Under what condition is pressure altitude and density altitude the same value? At sea level, when the temperature is 0 °F. When the altimeter has no installation error. At standard temperature. Which factor would tend to increase the density altitude at a given airport? An increase in barometric pressure. An increase in ambient temperature. A decrease in relative humidity. Time's upTime is Up! 0 Private Pilot – Chapter 10 Private Pilot – Chapter 7