ACI Concrete Field Testing Technician - Grade 1 (18) Exam Questions with Answers

ACI Concrete Field Testing Technician - Grade 1 (18) Exam Questions with Answers ASTM C1064 - Answer- Standard Test Method For Temperature of Freshly Mixed Hydraulic-Cement Concrete The end of the temperature sensing portion of the temperature measuring device shall be submerged a minimum of ____ into the freshly mixed concrete. - Answer- 3 inches [75 mm] C1064, Sec. 8.1 The temperature measuring device shall have a capacity of measuring the temperature of freshly mixed concrete to ± ____ °F (± ____ °C) throughout a range of ____ °F ( ____ °C). - Answer- ±1 °F (±0.5 °C) ; 30 to 120 °F (0 to 50 °C) C1064, Sec. 5.2 The temperature measuring device shall be calibrated ____ , or whenever there is a question of ____ . - Answer- annually, accuracy C1064, Sec. 6.1 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 or False - Answer- True C1064, Sec. 7.1 A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature. True or False - Answer- False C1064, Sec. 7.2.2 What must be done to the sample container prior to sampling the concrete? - Answer- Dampen with water C1064, Sec. 7.2.1 What must be done to the concrete surrounding the temperature measuring device after the device is submerged in the fresh concrete? - Answer- Close off air voids by gently pressing the concrete around the device C1064, Sec. 8.1 How long must the temperature measuring device remain in the freshly mixed concrete? - Answer- minimum of two minutes, maximum of five minutes C1064, Sec. 8.2 After the temperature of the concrete is read, what is then required? - Answer- Reporting of temperature