Question

The graph shows the typical test result of a property of a building material. Identify the test and the variables represented on the X-axis and Y-axis from the given options.

 

• A. Workability test of concrete; X-Axis: water-cement ratio; Y-Axis: amount of slump
• B. Cube test of concrete; X-Axis: water-cement ratio; Y-Axis: 28-days compressive strength
• C. Ultrasonic pulse velocity test; X-Axis: pulse velocity; Y-Axis: compressive strength
• D. Bulking test of sand; X-Axis: moisture percentage; Y-Axis: percentage increase in volume

Hint:

In the bulking test of sand, moisture content affects the volume of sand. This property is important in concrete mixing and for understanding the compactness of the sand in construction materials.

Answer 1

The Correct Option is D

The graph depicted shows a typical behavior related to the bulking test of sand. Here's how we analyze the graph:

Step 1: In the bulking test of sand, the relationship between the moisture percentage and the increase in the volume of sand is studied. As moisture content increases, the sand particles swell, leading to an increase in volume. The graph shows this increasing trend, which is characteristic of the bulking test.

Step 2: The X-axis in the graph corresponds to the moisture percentage, which is directly related to the water content in the sand sample. The Y-axis shows the percentage increase in volume, which indicates how much the volume of the sand increases as the moisture content rises.

Step 3: The typical shape of this curve is consistent with the bulking of sand, where the volume increases with increasing moisture up to a certain point, after which the increase in volume might level off or decrease.

Conclusion: The correct answer is (D) Bulking test of sand, with the X-axis representing moisture percentage and the Y-axis showing the percentage increase in volume.