ACI Concrete Field Testing Technician (Grade I) Questions and Answers 2024 Updated

ACI Concrete Field Testing Technician (Grade I) Questions and Answers 2024 Updated The sensor of the temperature measuring device shall be submerged a minimum of _____ in. [_____mm] into the freshly mixed concrete. - CORRECT 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 _____. - CORRECT 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 _____. - CORRECT ANSWER-Annually, accuracy The temperature of concrete may be measured in a wheelbarrow. True or False? - CORRECT ANSWER-True The temperature of concrete may be measured in a wall form. True of False - CORRECT 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? - CORRECT ANSWER-False What must be done to the sample container prior to sampling the concrete? - CORRECT 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. - CORRECT ANSWER-Gently press the concrete around the temperature measuring device at the surface of the concrete How long must the temperature measuring device remain in the freshly mixed concrete? - CORRECT ANSWER-At least 2 minutes but not more than 5 minutes After the temperature of the concrete is read, what is required? - CORRECT ANSWERReporting of temperature The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - CORRECT ANSWER-1 degree F [0.5 C] According to ASTM C1064, what is one reason to take the temperature of concrete? - CORRECT ANSWER-Verify conformance to a specified requirement for temperature of concrete A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True of False? - CORRECT ANSWER-False The sample of concrete used for temperature determination must be rodded 25 times. True or False? - CORRECT ANSWER-False Sampling by this method is required when tests are to be made to determine _____ with specification requirements. - CORRECT ANSWER-Compliance This method covers sampling from four types of mixtures which are _____, _____, _____, and _____. - CORRECT ANSWER-Stationary mixers, paving mixers, revolving drum mixers, and open top mixers The maximum allowable time between obtaining the first and final portions of a composite sample is _____ minutes. - CORRECT ANSWER-15 Portions of a composite sample shall be thoroughly remixed bfore beginning