## FAA Knowledge Test

Last update by Bruno on 11/06/2014
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# Which factor would tend to increase the density altitude at a given airport?

An increase in ambient temperature.

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• Answered in FAA Knowledge Test
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.
• Answered in FAA Knowledge Test
What effect does high density altitude have on aircraft performance?
It reduces climb performance.
• Answered in FAA Knowledge Test
Which combination of atmospheric conditions will reduce aircraft takeoff and climb performance?
High temperature, high relative humidity, and high density altitude.
• Answered in FAA Knowledge Test
If the outside air temperature (OAT) at a given altitude is warmer than standard, the density altitude is...
higher than pressure altitude.
• Answered in FAA Knowledge Test
You have planned a cross-country flight on a warm spring morning. Your course includes a mountain pass, which is at 11,500 feet MSL. The service ceiling of your airplane is 14,000 feet MSL. After checking the local weather report, you are able to calculate the density altitude of the mountain pass as 14,800 feet MSL. Which of the following is the correct action to take?
Re-plan your journey to avoid the mountain pass.
• Answered in FAA Knowledge Test
(Refer to figure 8 on page 159.) Determine the density altitude for these conditions:
Altimeter setting - 30.35
Runway temp. - +25 degrees F
Airport elevation: 2,894 feet MSL
2,000 feet MSL.
• Answered in FAA Knowledge Test
(Refer to fig. 8 on page 159.) What is the effect of a temperature increase from 30 degrees to 50 degrees F on the density altitude if the pressure altitude remains at 3,000 feet MSL?
1,300 cubic feet.
• Answered in FAA Knowledge Test
(Refer to Figure 8 on page 159.) Determine the pressure altitude at an airport that is 3,563 feet MSL with altimeter setting of 29.96
3,527 feet.
• Answered in FAA Knowledge Test
(Refer to fig. 8 on page 159.) What is the effect of a temp decrease and a pressure altitude increase on the density altitude from 90 degrees F and 1250 feet pressure altitude to 55 degrees and 1750 feet pressure altitude?
1700-foot decrease.
• Answered in FAA Knowledge Test
(Refer to figure 8 on page 159.) Determine the pressure altitude at an airport that is 1,386 feet MSL with an altimeter setting of 29.97.
1,341 feet MSL.
• Answered in FAA Knowledge Test
(Refer to figure 8 on page 159.) What is the effect of a temperature increase from 25 to 50 degrees F on the density altitude if the pressure altitude remains at 5,000 feet?
1,650-foot increase.
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