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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What is the maximum allowed percentage of error for loads in a testing machine according to ASTM C39?

  1. ± 0.5%

  2. ± 1.0%

  3. ± 2.0%

  4. ± 5.0%

The correct answer is: ± 1.0%

The maximum allowed percentage of error for loads in a testing machine according to ASTM C39 is ± 1.0%. This standard outlines the requirements for testing the compressive strength of cylindrical concrete specimens, including the calibration of the testing machine. The tolerance of ± 1.0% indicates that for the loads measured during the testing process, deviations from the actual load must not exceed this range, ensuring accuracy and reliability in the strength testing results. This level of precision is crucial as it helps maintain consistency and comparability in testing outcomes across different scenarios and testing equipment.

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