Which of the following is part of the procedure to assemble a flexible hose?

The assembly of a flexible hose involves multiple steps that ensure proper function and connection. Among these, screwing the nipple into the socket using a wrench is a critical step in the assembly process. This action creates a secure connection between the hose and the attachment point, which is essential for preventing leaks and ensuring the integrity of the fluid system. Using a wrench on the hex of the nipple allows for the appropriate torque to be applied, enabling a tight fit without damaging the components.

In addition, this step emphasizes the importance of following standard practices when assembling hose fittings, which often include guidelines for securing connections to withstand the pressures and vibrations of the system in operation. Properly assembled hoses contribute to the safety and reliability of fluid transport systems.

The other options, while relevant to certain tasks related to hoses, do not encapsulate the significance of the assembly process as directly as using a wrench on the nipple for a secure connection does.