Canadian Council of Independent Laboratories (CCIL) Practice Exam 2025 - Free CCIL Practice Questions and Study Guide

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What is the required condition for measuring freshly mixed concrete temperature?

At least 100mm of concrete around the sensor

75mm of concrete around the sensor

The correct requirement for measuring the temperature of freshly mixed concrete is specified as having at least 75 mm of concrete surrounding the sensor. This condition is important because an adequate amount of concrete around the temperature sensor helps ensure that the reading accurately reflects the temperature of the concrete as a whole rather than just the localized temperature around the sensor.

If the sensor is positioned with too little concrete around it, such as 50 mm or less, it may pick up temperature variations that do not represent the entire mix, leading to misleading results. Conversely, having 100 mm or more could also complicate the measurement process without adding significant benefit to the accuracy of the reading. Therefore, 75 mm strikes a balance that allows for reliable and representative temperature measurements of freshly mixed concrete.

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150mm of concrete around the sensor

50mm of concrete around the sensor

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