Concrete Technology Exam 1 Questions & Answers!!

Aggregates make up no more than 50% of the concrete volume. - ANSWERFalse Sampling from a coarse aggregate stockpile is bestaccomplished by using power equipment to make a small flat sampling pile. - ANSWERTrue When sampling from a horizontal surface on the stockpile face, create horizontal surfaces with vertical faces in the top, middle, and bottom third of the stockpile. - ANSWERTrue A sieve analysis of an aggregate sample is used to determine the gradatio - ANSWERTrue ASTM C 33 only defines the requirements of fine and coarse aggregate gradations. - ANSWERTrue According to ASTM C 33, the Fineness Modulus for continued shipments from a given source, shall not vary more than 0.20 from the base modulus. - ANSWERTrue ASTM C 33 coarse aggregate size number 67 has a nominal maximum size of 1". - ANSWERFalse ASTM C 33 coarse aggregate size number 57 has a nominal maximum size of 1". - ANSWERTrue High strength concrete cannot be made with lightweight aggregate. - ANSWERFalse Lightweight aggregate has been known to create air issues when measuring the air content using a Type B air meter. - ANSWERTrue