A person with this job must be able to safely operate the truck and its auxiliary equipment such as levers, chutes and mixing drums. When he/she picks up the materials to be loaded into the mixer, the driver must be able to manipulate the drum under the hoppers that dispense the cement, gravel, sand and water into it. He/she has to understand the mixing procedure and adjust the speeds on the mixer accordingly. The driver must know what materials should be in the blend and check the work order to ensure he/she is picking up the appropriate mixture.