ACI Concrete Strength Testing Technician Practice Test

Which block is recommended for providing a machinable surface during maintenance?

1. Top bearing

2. Anvil block

3. Bottom bearing

4. Side block

The correct answer is: Bottom bearing

The recommended choice for providing a machinable surface during maintenance is the bottom bearing block. The bottom bearing block is designed to support the testing apparatus and usually features a flat, stable surface that can be easily machined or modified when necessary. This ensures that it can sustain repeated loads, maintain alignment, and support consistent testing conditions. Machinable surfaces are essential for achieving precise measurements and ensuring accurate concrete strength tests, as any irregularities could lead to inconsistent results. In contrast, other blocks, such as the top bearing, anvil block, and side block, may serve different functions in the testing setup and are not primarily meant for providing a stable surface during maintenance. Their designs may prioritize other operational aspects rather than machinability. Thus, the bottom bearing is specifically suited for this requirement.