A sand sample with a cumulative percentage of 3.15 would be graded as which of the following?
A) Fine sand
B) Medium
C) Coarse
D) None of the above
Answer (1)
The problem requires grading a sand sample based on a cumulative percentage of 3.15.
Lower cumulative percentages typically indicate finer sand.
Based on general knowledge, 3.15 suggests the sand is fine.
Therefore, the answer is \boxed{A}
Explanation
Understand the problem and provided data We are given a sand sample with a cumulative percentage of 3.15. We need to determine its grade based on the following options: A) FINE SAND B) MEDIUM C) COARSE D) NONE OF THE ABOVE
Grading scales for sand samples To determine the grade, we need to know the standard grading scales for sand based on cumulative percentage. Generally, sand grading is based on particle size rather than cumulative percentage directly. However, a lower cumulative percentage typically corresponds to finer sand, while a higher percentage corresponds to coarser sand. Without specific grading criteria related to cumulative percentage, we must rely on general knowledge of sand particle size distribution.
Compare the given cumulative percentage to the established ranges Based on general knowledge, fine sand typically has a cumulative percentage closer to 0, medium sand has a higher cumulative percentage than fine sand, and coarse sand has an even higher cumulative percentage. Since 3.15 is a relatively low cumulative percentage, it suggests the sand is likely fine.
Select the appropriate grade Given the options, the most appropriate grade for a sand sample with a cumulative percentage of 3.15 is likely FINE SAND.
Final Answer Therefore, the answer is A) FINE SAND.
Examples
In civil engineering, understanding the grading of sand is crucial for concrete production. The fineness of sand affects the workability and strength of concrete. For example, fine sand is often used in mortar for bricklaying, while coarser sand is preferred for structural concrete.
