How can a CTI verify the drum is rotating correctly during transit?

• A. Observe smooth rotation at the proper speed and listen for abnormal noises; confirm continuous mixing
• B. Check the truck's fuel gauge
• C. Read the odometer
• D. Inspect the exterior paint

Answer: (A)

During transit, you want to confirm the drum is turning as designed and continuously mixing the contents. This means watching the drum rotate smoothly at the proper speed and listening for normal operating sounds. If rotation is smooth and steady and you don’t hear unusual noises, it indicates the mixing action is ongoing and the concrete is staying well-mixed as the truck moves. Conversely, any irregular rotation, grinding, clanking, or hesitation can signal a problem—like an overloaded drum, bearing issue, or drive mechanism needing attention—which could lead to improper mixing or segregation. The other options don’t inspect drum operation at all: fuel level, distance traveled, or exterior appearance don’t reflect whether the drum is rotating correctly or actively mixing.