What role do load cells play during the weighing of an aircraft?

Load cells are essential instruments used to measure weight by converting a force into an electrical signal. When weighing an aircraft, load cells are specifically utilized during the process of lifting the aircraft off the ground. By being placed on jacks or lifting devices, they directly measure the force exerted by the weight of the aircraft. This gives an accurate reading of the aircraft's weight, which is critical for ensuring proper balancing, stability, and compliance with safety regulations.

The operation of load cells relies on their inherent ability to provide precise weight measurements, which is particularly important in aviation due to the strict weight limitations that must be adhered to for safe flight operations. The use of load cells in this context helps ensure that the aircraft is within allowable weight limits, facilitating proper loading and fuel management.

While other options may involve related concepts, they do not accurately describe the primary function of load cells in this specific scenario. For example, measuring fuel capacity, assisting in leveling, or calculating tare weight are distinct processes that do not coincide with the primary function of load cells when an aircraft is hoisted for weighing. The direct involvement of load cells in the lifting process uniquely qualifies option B as the correct choice.