ACI Concrete Field Testing Technician- Grade I Questions With Correct Solutions

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