Left/Right Wing Tank at Full: what is the pressure-based fuel quantity per wing tank?

Left/Right Wing Tank at Full: what is the pressure-based fuel quantity per wing tank?

• A. 7,492 LBS
• B. 7,290 LBS
• C. 4,610 LBS
• D. 19,594 LBS

Answer: (A)

This question is about how the CRJ-550 determines fuel quantity in a wing tank using a pressure-based measurement. Instead of a direct float or sight gauge, the system senses the pressure head of the trapped fuel and converts that pressure into a pounds-of-fuel reading via a calibration curve. When a wing tank is full, the pressure corresponds to a specific value on that curve, which for each wing is 7,492 pounds. That number represents the usable capacity as interpreted by the fuel-quantity system. So, the pressure-based indication per wing, when full, is 7,492 pounds. The other numbers would imply less than full or an implausibly high amount for a single wing tank, which is why they don’t fit the standard full-tank indication.

This question is about how the CRJ-550 determines fuel quantity in a wing tank using a pressure-based measurement. Instead of a direct float or sight gauge, the system senses the pressure head of the trapped fuel and converts that pressure into a pounds-of-fuel reading via a calibration curve. When a wing tank is full, the pressure corresponds to a specific value on that curve, which for each wing is 7,492 pounds. That number represents the usable capacity as interpreted by the fuel-quantity system.

So, the pressure-based indication per wing, when full, is 7,492 pounds. The other numbers would imply less than full or an implausibly high amount for a single wing tank, which is why they don’t fit the standard full-tank indication.