What term describes the sampling process that occurs on the conveyor belt during production?

The term that describes the sampling process occurring on the conveyor belt during production is "on belt." This method involves taking samples directly from the material as it is being transported along the conveyor system. It is a crucial practice in aggregate production as it helps ensure that the quality and characteristics of the material are consistent and representative of the overall batch being processed.

Sampling on the conveyor belt allows for immediate and continuous monitoring, which can facilitate timely adjustments to the production process if necessary, ensuring that the final product meets specifications. This method is particularly effective for maintaining quality control during the production process.

In contrast, the other options refer to different sampling techniques or contexts. "Off belt" sampling would involve collecting samples from material after it has been discharged from the conveyor, which may not provide a real-time assessment of material quality. "Random sampling" generally pertains to selecting samples based on a random selection method, but does not specifically relate to the physical process of collection on the conveyor. "Internal sampling" usually refers to taking samples from within the material itself, possibly involving more complex alterations to access the sample. Thus, "on belt" is the most appropriate and accurate term for sampling during production on a conveyor system.