ACI Concrete Field Testing Technician - Grade 1 (Canada) Exam Questions and Answers | Verified & Updated 2024

ACI Concrete Field Testing Technician - Grade 1 (Canada) Exam Questions and Answers | Verified & Updated 2024 The standard practice describes the _____ _____ and _____ required to obtain a representative sample of fresh concrete and to assess its tractability to the structure it represents. - Answer ️️ - procedures, location and sample size The procedures used in sampling shall include the use of every precaution that will assist in obtaining samples that are truly representative of the _____and _______ of the concrete. - Answer ️️ -nature, conditions Intermittent scooping of the sample in shovelfuls or bucketfuls into a wheelbarrow or tray as the concrete continues to flow down the delivery chute is an acceptable technique? - Answer ️️ - False The concrete sample must be protected at all times from sun, wind,____and - Answer ️️ -rapid evaporation, contaminants the minimum size sample for making strength test cylinder specimens is - Answer ️️ -20l for 100x200mm 30l for 150x300mm 55l when 3 flexural beams are made When sampling for uniformity of mixed concrete____grab samples shall be obtained from widely separated portions of the batch during discharge - Answer ️️ -Three The sample form a mixer must be obtained between the ____% and ____%points of the discharge - Answer ️️ -10, 90 When the concrete contains aggregate whose nominal size is larger than that permitted for a particular test method, the sample of concrete must be _____before making the test(except for Density tests) - Answer ️️ -Wet Sieved(over the appropriate sieve size) Air content (pressure method) measurement and slump must both be completed within___minutes of transporting and remixing of the sample - Answer ️️ -10