What is the minimum fuel quantity that can be in each tank for the ERJ 170/175?

The correct answer reflects the minimum fuel quantity that must be maintained in each tank of the ERJ 170/175 to ensure adequate fuel system operation and prevent potential issues. Specifically, a minimum of 75 lbs of fuel in each tank is essential to ensure that the fuel pumps are adequately submerged and able to supply fuel to the engines without risk of starvation.

Maintaining this minimum fuel quantity helps in avoiding problems such as fuel pump overheating or damage, as well as ensuring that the engines can be supplied with fuel during all phases of operation, including during normal flight and emergency situations. This limitation is critical to flight safety and operational reliability.

In this context, other values provided are not sufficient to meet the operational integrity required for safe flight; therefore, the 75 lbs minimum is established as a necessary limit in the design and operation guidelines for the aircraft.