The hydraulic fluid tank must be which of the following?

The hydraulic fluid tank must be mounted securely to ensure the safe operation of the vehicle. A securely mounted tank reduces the risk of leaks or spills that could occur if the tank is loose or improperly secured. Additionally, a securely mounted tank ensures that hydraulic lines remain intact and functional, which is essential for the operation of systems that rely on hydraulic pressure, such as brakes or steering.

If the tank were visibly cracked or able to be open to the elements, it could lead to the degradation of the hydraulic fluid, contamination, or loss of fluid, which could all compromise the functionality of the hydraulic system. Similarly, a completely empty tank would render the hydraulic system inoperative, leading to potential safety hazards. Therefore, secure mounting is critical for functionality and safety in the operation of vehicles with hydraulic systems.