CEA Fundamentals Block 3 Practice Test 2026 - Free Fundamentals Practice Questions and Study Guide

Shutting off the main tank pumps while continuing to feed from the bladder tank creates a hazardous break in the fuel-feed path. The bladder tank is a small reserve used to buffer or supplement fuel under certain conditions, but it isn’t intended to be the sole source of engine fuel under normal operation. When the main pumps are off, the system loses the pressurized, reliable flow those pumps provide, and the bladder’s supply can’t always meet the engine’s demand, especially with changes in attitude, acceleration, or fuel sloshing. This can lead to fuel starvation, air entrainment, or interruptions in fuel pressure, which can contribute to a mishap. The other actions described would either maintain or restore proper fuel flow or are safety actions, rather than introducing a failure in the fuel-feed system.