ACI Concrete Field Testing Technician- Grade I questions with correct answers

The sensor of the temperature measuring device shall be submerged a minimum of _____ in. [_____mm] into the freshly mixed concrete. Answer 3 in. [75 mm] The temperature measuring device shall have a capacity of measuring temperature of freshly mixed concrete to +- _____ degrees F [+- _____ C] throughout a range of _____. Answer 1 degree F [0.5 C], 30 degrees F to 120 F [0 C to 50 C] The temperature measuring device shall be calibrated _____, or whenever there is a question of _____. Answer Annually, accuracy The temperature of concrete may be measured in a wheelbarrow. True or False? Answer True The temperature of concrete may be measured in a wall form. True of False Answer True A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature. True of False? Answer False What must be done to the sample container prior to sampling the concrete? Answer Dampen (with water) What must be done to the concrete surrounding the temperature measuring device after the device is submerged in the fresh concrete. Answer Gently press the concrete around the temperature measuring d