ACI Concrete Field Testing Technician- Grade I Questions and Answers 100% Accurate.ACI Concrete Field Testing Technician- Grade I Questions and Answers 100% Accurate.

Section 1: Temperature of Freshly Mixed Hydraulic-Cement Concrete - ANSWER C1064 The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of _____ into the freshly mixed concrete. - ANSWER 3 inches The temperature measuring device shall be capable of accurately measuring temperature of freshly mixed concrete to _____, throughout a range of _____. - ANSWER +/- 1 °F 30 °F to 120 °F The temperature measuring device shall be verified _____, 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 device at the surface of the concrete How long must the temperature measuring device remain in the freshly mixed concrete? - ANSWER At least 2 minutes but not more than 5 minutes After the temperature of the concrete is read, what is required? - ANSWER Reporting of temperature The temperature of concrete is reported to the nearest _____. - ANSWER 1 °F According to ASTM C1064, what is one reason to take the temperature of concrete? - 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? - ANSWER False Section 2: Sampling Freshly Mixed Concrete - ANSWER C172 The sample of concrete used for temperature determination must be rodded 25 times. True or False? - ANSWER False Sampling by this method is required when tests are to be made to determine _____ with specification requirements. - ANSWER Compliance This method covers sampling from four types of mixtures which are _____, _____, _____, _____, and _____. - ANSWER Stationary mixers, Paving mixers,