What is the cranking rate of the liquid limit device?

The cranking rate of the liquid limit device is set at two revolutions per second. This specific rate is crucial for ensuring that the results obtained from the liquid limit test are consistent and reproducible. The liquid limit test is designed to determine the moisture content at which soil changes from a plastic to a liquid state.

By rotating the crank at this standardized speed, the device efficiently brings about the necessary deformation in the soil sample while reducing the likelihood of variations that could arise from different cranking speeds. This adherence to a standard helps in making comparisons of soil properties across different tests and laboratories, ensuring that engineers and technicians can rely upon the data generated for their assessments and decisions.