Common Passenger Vehicle Rescue Technician Practice Test Prep & Study Guide

The primary function of a fuel cell is to combine hydrogen and oxygen to produce electricity. This process occurs through a chemical reaction where hydrogen is fed into the anode side of the fuel cell and oxygen (usually from the air) is fed into the cathode side. The reaction generates electricity, which can be used to power electric motors in vehicles and other applications. The only byproduct of this reaction is water, making fuel cells an environmentally friendly option for energy production.

Other functions, such as storing fuel or converting gasoline, do not accurately describe the operation of a fuel cell. Fuel cells focus specifically on the electrochemical process to generate electricity efficiently and cleanly.