ACI Concrete Strength Testing Technician Practice Test

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Get ready for the ACI Concrete Strength Testing Technician exam with comprehensive quizzes featuring flashcards and multiple choice questions. Each question includes hints and explanations to help you understand all aspects of concrete strength testing.

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Is the rotation of the movable portion of the testing machine's bearing block necessary when using pad caps?

  1. Yes

  2. No

  3. Only for larger specimens

  4. Only for smaller specimens

The correct answer is: No

The rotation of the movable portion of the testing machine's bearing block is not necessary when using pad caps because pad caps are designed to provide a stable and uniform support surface for the concrete specimen during testing. This means that they effectively distribute the load and minimize stress concentrations that can lead to premature failure of the specimen. Since pad caps align the bearing surface with the specimen itself, the need to rotate the movable portion of the bearing block is eliminated. In this context, the design of the testing apparatus alongside the properties of the pad caps ensures the effectiveness of the testing procedure without requiring additional adjustments, thus making the process smoother and reducing the chances of error or misalignment.

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