Which of the following is a post start check related to braking?

Testing the foot and hand brakes in both directions is a crucial post-start check related to braking. This procedure ensures that the braking system is fully operational, allowing the operator to verify that both the foot and hand brakes engage and release appropriately. It is vital for safety because an effective braking system is essential for controlling the forklift, especially in dynamic environments where the operator may need to stop quickly or maneuver in tight spaces. By checking the brakes in both directions, the operator can ensure that they work effectively regardless of the situation, thus minimizing the risk of accidents.

Other post-start checks, such as checking the horn functionality or gauging the load weight, are important but do not specifically relate to the operation of the braking system. Similarly, inspecting visibility is essential for safe operation, but it focuses on the operator's ability to see their surroundings rather than the functionality of the brakes themselves.