ACI Concrete Strength Testing Technician - Test Method C78/C78M fully solved

ACI Concrete Strength Testing Technician - Test Method C78/C78M True - correct answer T/F: Hand-operated machines having pumps that do not provide a continuous loading in one stroke are not permitted. Third-point loading - correct answer Bearing blocks used int he ___ method must ensure that forces applied to the beam will be perpendicular to the face of the specimen and applied without eccentricity. +/- 1.0 mm [+/- 0.05 in.] - correct answer The testing equipment must be capable of maintaining distances between load-applying and support blocks constant within ___ mm [in.]. a) and c) - correct answer Which of the following are requirements for load-bearing and support blocks: a) they should be 65 mm [2.50 in.] high or less b) they should be half as wide as the specimen c) they should be in contact with the rod or ball Scars, indentations, holes, inscribed identification marks - correct answer Test specimen surfaces should be smooth and free of ___, ___, ___, or ___. True - correct answer T/F: In relation to the applied force, the loading system should be centered during the procedure. Use of shims, grinding, or capping - correct answer During the testing, if suitable contact is not made between the specimen and bearing block surfaces, ___, ___, or ___ may be required. Surface, more than - correct answer It is acceptable to use leather sims only when the gap between the specimen ___ in contact with the blocks is not ___ 0.40 mm [0.015 in.]. Three, dimension - correct answer To determine the average width, depth, and line of fracture location of the specimen, you should take ___ measurements across each ___.