ACI Concrete Strength Testing Technician - Test Method C39/C39M Questions with 100% Correct Answers

ACI Concrete Strength Testing Technician - Test Method C39/C39M Questions with 100% Correct Answers False; have a density of more than 800 kg/m3 (50 lb/ft3) - Answer️️ - This test method measures the compressive strength of cylindrical concrete specimens that have a density of less than 800 kg/m3 (50 lb/ft3). True or False? False; a prescribed rate - Answer️️ - Test Method C39/C39M consists of applying a compressive axial load to molded cylinders or cores at any rate until failure occurs. True or False? Shape, mixing, moisture - Answer️️ - Results obtained from the compressive strength test method will depend on many things, such as the size and _____ of the specimen, batching, _____ procedures, the age, temperature, and _____ conditions during curing. Compressive strength - Answer️️ - This test method is used to determine _____ _____ of cylindrical specimens. 13, relocation, repairs, accuracy - Answer️️ - The calibration of the testing machines must be verified under four conditions: within _____ months of the last calibration, upon original installation or after _____, after making _____ or adjustments, and whenever there is reason to suspect the _____ of the indicated loads. False; apply the load continuously - Answer️️ - The machine must be power operated and apply the load intermittently. True or False? True - Answer️️ - Supplemental means of loading for calibration may be power or hand operated. True or False? +/-1.0% - Answer️️ - The percentage of error for loads used in the testing machine should not exceed _____ of the indicated load. True - Answer️️ - The testing machine should have two steel bearing blocks: a spherically seated block and a solid block. True or False? Ball, socket - Answer️️ - The _____ and _____ of the spherically seated bearing block must be designed so the steel in the contract area doesn't permanently deform when loaded to the capacity of the testing machine.