ACI Concrete Field Testing Technician - Grade I Practice Exam

Question: 1 / 400

Which of the following is NOT a requirement for the surface on which the slump mold is placed?

Flat and level

Moist

Free of vibration

Rough texture

The requirement for the slump mold’s surface to be flat and level is essential because it ensures that the slump test is conducted uniformly, allowing for consistent measurements. A moisture condition is also important, as a damp surface can help prevent the concrete from sticking and altering the test's outcome. Likewise, having a surface free of vibration helps maintain stability during the test, which is crucial for accuracy.

In contrast, the requirement for a rough texture is not typically considered important for the slump test setup. While a rough surface might not significantly impact the test results, concrete is usually tested on a flat, smooth, and stable surface. Therefore, choosing a rough texture is not a requirement for the successful execution of the slump test.

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