ACI Aggregate Base Testing Technician Test Questions

ACI - Concrete Strength Testing Technician (CSTT), Questions and Correct Answers. With Complete Solution. Standard Practice for Capping Cylindrical Concrete Specimens ASTM C617 Procedures for capping enable concrete cylinders and cores to meet C617's practice requirements for___ and___. C617 perpendicularity, planeness C617, 3.1 ____ ____ can be made of glass, machined metal, polished granite, or diabase. C617 Capping plates C617, 4.1 Sulfur caps can be formed against ___ or___ plates. C617 metal, stone C617, 4.1 The working surface of a capping plate shall not depart from a plane by more than ___ inch ( ___ mm) in 6 inches (150 mm). C617 0.002 inch (0.05 mm) C617, 4.1 Device used in conjunction with a capping plate to ensure perpendicularity. C617 Alignment device C617, 4.2 Perpendicularity requirement of the axis of a cylindrical specimen is ___° . C617 0.5° C617, 4.2 The element of a melting pot that ensures against accidents during the reheating of cooled sulfur. C617 Peripheral Heating C617, 4.3.1 Temperature of the sulfur mortar pot / materials. C617 265 - 290°F (130 - 145°C) C617, 5.4.2 Capping material to be used on freshly molded cylinders. C617 Neat Portland Cement paste C617, 6.1 Remove this from the end of cylinders before capping. C617 oily or waxy materials C617, 6.2.1 Materials that can be used to cap hardened cement concrete cylinders are ___ , ___ , ___ . C617 Neat Portland Cement, Gypsum Cement, Sulfur mortar C617, 1.1 Plaster of paris is an example of a high-strength plaster. (T/F) C617 False C617, Note: 7 Sulfur and gypsum cubes minimum compressive strength is ____ or the cylinder strength, whichever is greater. C617 5000 psi C617, Table 1 Strength of the Neat Cement Paste depends on ___ , ___ , and ___ . C617 Water cement ratio, time, type of cement C617, 5.2.1 & Note: 4 These are avoided when a slight twisting motion is applied while capping. C617 Air voids and excess paste C617, 6.1