ACI Concrete Field Testing Technician - Grade 1 (Canada)question well answered 2024/2025

ACI Concrete Field Testing Technician - Grade 1 (Canada)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. - correct 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. - correct answer nature, conditions Intermittent scooping of the sample in shovelfuls or bucketsful into a wheelbarrow or tray as the concrete continues to flow down the delivery chute is an acceptable technique? - correct answer False The concrete sample must be protected at all times from sun, wind, ____and - correct answer rapid evaporation, contaminants the minimum size sample for making strength test cylinder specimens is - correct 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 - correct answer Three The sample form a mixer must be obtained between the ____% and ____%points of the discharge - correct 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) - correct answer Wet Sieved(over the appropriate sieve size)