Study guides, Class notes & Summaries

ACI Aggregate Testing Technician - Level 1 - Section 8 This test method involves the use of hazardous materials. True or False? True The user of these standards is responsible for any safety problems associated with them. True or False? True The principal value of this test is to furnish a warning that injurious amounts of ____ may be present. Organic impurities A dark color in the test sample is a warning sign. True or False? True When a sample subjected to this test produces a color...

ACI Aggregate Testing Technician - Level 1 - Section 7 For most purposes, this test method measures the moisture in a test sample more reliably than the test sample ______ . Can be made to represent the aggregate supply A ventilated controlled-temperature oven should be used for the test when the aggregate is _____ by heat or when a more _____ measurement is required. Altered, refined• (or their equivalents) It takes longer for moisture to travel from the interior of a large particle of...

ACI Aggregate Testing Technician - Level 1 - Section 6 Relative density (specific gravity) (OD) is used when the aggregate is ____ while relative density (specific gravity) (SSD) is used when the aggregate is ______ . Oven Dry, Saturated Surface-Dry ____ does not include the pore space within particles that is accessible to water. Apparent specific gravity There may be a low absorption in aggregates mined below the water table if they haven't been allowed to dry. True or False? False; a...

ACI Aggregate Testing Technician - Level 1 - Section 5 The method is appropriate for coarse but not ____ aggregate. Lightweight SSD refers to _____ - _____ - _____ condition. saturated-surface-dry To calculate the volume of aggregate in a mixture (including the voids between the particles) is to determine the ______. Bulk specific gravity When the mass of the water within the voids after 24-hour absorption is included in the volume of aggregate, you are calculating the ______. Relative...

ACI Aggregate Testing Technician - Level 1 - Section 3 During this test method, water-soluble materials, clay particles, and incidental aggregate particles are removed from the aggregate. True or False? True Of the two possible test procedures, Procedure A is to be used unless otherwise specified. True or False? True In one of the methods only ____ is used for washing and in the other method a ____ is used as well. Water, wetting agent The purpose of using a wetting agent is to ____ fin...

ACI Aggregate Testing Technician - Level 1 - Section 2 Unless the procedures recommended here are carried out precisely, a ____ sample can result. Nonrepresentative Generally speaking, small samples are most representative of the total supply. True or False? False; large samples are more representative There are some instances in which ____ between the test samples can't be avoided. Differences When reduction of the field sample before testing isn't recommended, the ____ field sample ...

ACI Aggregate Testing Technician - Level 1 - Section 1. AASHTO T 2 / ASTM D75 Four purposes for which aggregates are sampled. a) for the acceptance or rejection of materials. b) for the control of operations at the site of use. c) for preliminary investigation of the potential source of supply. d) for the control of the product at the source of supply AASHTO T 2 / ASTM D75 Sampling should be done very carefully because it is as important as _____. Testing AASHTO T 2 / ASTM D75 A var...

ACI - Aggregate Base Testing Technician Exam Questions With 100% Correct Answers Testing - answerSampling should be done very carefully because it is as important as ____________. Conveyer belts Transport units Roadways Stockpiles - answerWhat are the four sources from which field samples can be obtained? contaminated, damaged - answerSampling containers for aggregate samples should be made so that the contents will not be lost, _____ or _____. Nonrepresentative sample - answerNot usi...

ACI Aggregate Testing Technician - Level 1 - Section 3 Exam Questions And Answers (Updated And Verified) During this test method, water-soluble materials, clay particles, and incidental aggregate particles are removed from the aggregate. True or False? - answerTrue Of the two possible test procedures, Procedure A is to be used unless otherwise specified. True or False? - answerTrue In one of the methods only ____ is used for washing and in the other method a ____ is used as well. - answe...