Each thread is formed from how many grams of the test sample?

The correct choice indicates that each thread is formed from 1.5-2.0 grams of the test sample, which is consistent with standard practices in aggregate testing. In many methods of analysis, a specific amount of sample is required to ensure accuracy and reliability in the results. Using this weight range allows for sufficient material to capture the properties relevant to the testing method while also ensuring that the sample size can provide a representative result for the entire batch being tested.

This weight is often selected based on the need for effective processing during the testing procedures. Too little material (beneath this range) might not yield reliable data or could lead to non-representative results. Conversely, using significantly more than this prescribed range could complicate handling and analysis without proportionate benefit in data quality.

Therefore, understanding that the 1.5-2.0 gram range is commonly accepted helps technicians adhere to industry standards and ensures their results will be comparable and valid in the context of aggregate testing.