ACI Concrete Field Testing Technician Grade I 2026/2027 | 83 Questions & Answers | ASTM C1064, C172, C143, C138, C231, C173 & C31 | American Concrete Institute (ACI)

This ACI Concrete Field Testing Technician Grade I 2026/2027 exam study guide contains approximately 83 questions with correct answers covering the essential procedures, measurements, calculations and field practices involved in testing freshly mixed concrete. The document provides concentrated exam preparation across concrete temperature measurement, representative sampling, slump testing, density and yield calculations, pressure and volumetric air-content testing, cylinder fabrication, consolidation, initial curing and final curing. No university name or separate university course code is identified in the uploaded material, so American Concrete Institute (ACI) is used as the relevant professional institution rather than assigning an unsupported university affiliation. The opening sections focus on fresh concrete temperature and sampling procedures. Questions address temperature-measuring-device accuracy and verification, required concrete cover around the sensor, measurement duration and reporting precision. Sampling material includes adding water and admixtures before sampling, obtaining representative portions from revolving truck and paving mixers, controlling discharge, composite samples, minimum sample quantities, remixing, wet sieving and the time limits for beginning temperature, slump, air-content and strength-specimen procedures. A substantial portion covers the concrete slump test, including applicability to plastic and cohesive concrete, slump-mold geometry, preparation of the base, three-layer filling, 25 rodding strokes per layer, penetration into previous layers, strike-off technique, mold removal and measurement of slump. The document also explains what to do when a shear slump occurs and emphasizes the timing requirements for completing the procedure. The density, unit weight and yield section combines procedural knowledge with calculations. Students review selection of the measuring container, strike-off plate requirements, consolidation by rodding or vibration according to slump, determination of concrete density from mass and measure volume, calculation of yield from batch mass and density, relative yield and calculation of air content using theoretical and actual density. Detailed preparation is also provided for air-content testing by pressure and volumetric methods. Pressure-meter material includes acceptable aggregate characteristics, filling and rodding procedures, mallet tapping, vibration and safe pressure release. The volumetric or Roll-a-Meter section covers applicability to different aggregate types, preparation of the bowl, water and alcohol addition, agitation and rolling, stabilization, foam limits, calibrated cups, meniscus readings and examination of the concrete after testing. The final section addresses concrete test-cylinder fabrication and curing. It covers 6 × 12-inch cylinder preparation, three-layer placement, rodding, tapping, specimen identification, movement to initial storage, transportation after final set, initial curing temperatures and final curing conditions. The document concludes with a useful comparison of maximum aggregate and wet-sieving requirements for slump, pressure-meter and Roll-a-Meter procedures. The content is consistent with the principal testing areas associated with ACI Concrete Field Testing Technician—Grade I preparation. A suitable authoritative companion reference is the American Concrete Institute's CP-1: Technician Workbook for Concrete Field Testing Technician—Grade I, which covers the ASTM test methods used in the certification program, including ASTM C1064/C1064M, C172/C172M, C143/C143M, C138/C138M, C231/C231M, C173/C173M and C31/C31M. ACI Concrete Field Testing Technician—Grade I program APA Reference: American Concrete Institute. (2025). CP-1: Technician workbook for Concrete Field Testing Technician—Grade I (41st ed.). American Concrete Institute. ACI CP-1 Technician Workbook Relevant Students: This study document is relevant for ACI Concrete Field Testing Technician—Grade I candidates, civil engineering students, construction engineering students, construction management students, concrete technology students, materials engineering students, construction materials testing students, concrete laboratory technicians, field technicians, concrete inspectors and quality-control personnel preparing to perform or understand standardized fresh-concrete field tests. 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