FAA Aviation Mechanic Airframe (AMA)Fuel, Cabin and Ice Control SystemsMedium
A line technician refuels an aircraft with 800 gallons of Jet A fuel. Using a standard density of 6.7 pounds per gallon, what is the total weight of fuel added?
- A5,360 pounds
- B4,824 pounds
- C6,700 pounds
- D5,936 pounds
Show answer & explanationAnswer & explanation
Correct answer: A. 5,360 pounds
Weight = volume × density = 800 gal × 6.7 lb/gal = 5,360 pounds. This calculation is essential for weight and balance computations when fuel is loaded by volume.
Why the other options are wrong
- B. This would result from an incorrect density value below 6.7 lb/gal.
- C. This equals 1,000 gallons at 6.7 lb/gal, not 800 gallons.
- D. This overstates the weight, possibly from using a density above 6.7 lb/gal.
Fuel Weight Calculation
Fuel weight is found by multiplying the volume of fuel (gallons) by its density (lb/gal); Jet A is typically 6.7 lb/gal.
- Jet A standard density: 6.7 lb/gal
- Avgas standard density: 6 lb/gal
- Weight = volume × density
Memory trick: '6.7 for Jet, 6 for gas' — remember densities by fuel type