FAA PPL Test Prep: Ch. 8 (1 of 3): Aircraft Performance Questions

Unusable fuel and undrainable oil.

Which items are included in the empty weight of an aircraft?

18.4 gallons.

An aircraft is loaded 110 pounds over maximum certificated gross weight. If fuel (gasoline) is drained to bring the aircraft weight within limits, how much fuel should be drained?

15 gallons.

If an aircraft is loaded 90 pounds over maximum certificated gross weight and fuel (gasoline) is drained to bring the aircraft weight within limits, how much fuel should be drained?

CG 94.01.

GIVEN:
WEIGHT ARM MOMENT
(LB) (IN) (LB-IN)
Empty weight 1,495.0 101.4 151,593.0
Pilot and passengers 380.0 64.0 ----
Fuel (30 gal
usable no reserve) ----- 96.0 ----

The CG is located how far aft of datum?

105 pounds.

(Refer to Figure 34.) What is the maximum amount of baggage that may be loaded aboard the airplane for the CG to remain within the moment envelope?

WEIGHT (LB) MOM/1000
Empty weight 1,350 51.5
Pilot and front passenger 250 ---
Rear passengers 400 ---
Baggage --- ---
Fuel, 30 gal --- ---
Oil, 8 qt --- -0.2

80.8, utility category.

(Refer to Figure 34.) Calculate the moment of the airplane and determine which category is applicable.

WEIGHT (LB) MOM/1000
Empty weight 1,350 51.5
Pilot and front passenger 310 ---
Rear passengers 96 ---
Fuel, 38 gal --- ---
Oil, 8 qt --- -0.2

40 gallons.

(Refer to Figure 34.) What is the maximum amount of fuel that may be aboard the airplane on takeoff if loaded as follows?

WEIGHT (LB) MOM/1000
Empty weight 1,350 51.5
Pilot and front passenger 340 ---
Rear passengers 310 ---
Baggage 45 ---
Oil, 8 qt --- ---

74.9 pound-inches.

(Refer to Figure 34.) Determine the moment with the following data:

WEIGHT (LB) MOM/1000
Empty weight 1,350 51.5
Pilot and front passenger 340 ---
Fuel (std tanks) Capacity ---
Oil, 8 qt --- ---

79.2, normal category.

(Refer to Figure 34.) Determine the aircraft loaded moment and the aircraft category.

WEIGHT (LB) MOM/1000
Empty weight 1,350 51.5
Pilot and front passenger 380 ---
Fuel, 48 gal 288 ---
Oil, 8 qt --- ---

300 pounds.

(Refer to Figure 61.) If 50 pounds of weight is located at point X and 100 pounds at point Z, how much weight must be located at point Y to balance the plank?

1 inch to the left.

(Refer to Figure 60.) How should the 500-pound weight be shifted to balance the plank on the fulcrum?

dividing total moment by total weight.

Center of gravity can be found by

the distance from the datum line to the item.

In weight and balance calculations, arm is