ACI - Aggregate Base Testing Technician Exam Questions With Correct Answers.

Sampling should be done very carefully because it is as important as ____________. - Answer-Testing What are the four sources from which field samples can be obtained? - Answer-Conveyer belts Transport units Roadways Stockpiles Sampling containers for aggregate samples should be made so that the contents will not be lost, _____ or _____. - Answer-contaminated, damaged Not using correct procedures for reducing samples to testing size can result in a _____. - AnswerNonrepresentative sample T or F Generally, small samples are most representative of the total supply. - Answer-False T or F There are some instances in which differences between test samples can't be avoided. - Answer-True What determines whether large-size particles are equally distributed among test samples that have been reduced? - Answer-Laws of chance Which method of reducing a sample must be used with fine, dry aggregate? - Answer-Method A, mechanical splitter What must be done to the sample if method B or C is used? - Answer-Moisten the sample What do you do if the sample is wet and Method A is to be used? - Answer-Dry the sampleMethod C, miniature stockpiling, cannot be used for which type of aggregate? - Answer-Coarse aggregate, or mixtures of coarse and fine aggregate Which method involves the use of chutes, holding receptacles, and hoppers or straight-edged pans? - Answer-Method A Sample splitters must have how many equal width chutes for coarse aggregate? - Answer-8 Sample splitters must have how many equal width chutes for fine aggregate? - Answer-12 In Methods B and C the sample is shoveled into a ____ before it is flattened and divided. - Answerconical pile When using Method B, what is an alternate surface that can be used when reducing the sample? - Answer-Canvas blanket or tear resistant tarp When quartering a sample, retain two _________ quarters and reject the other two. - Answerdiagonally opposite In miniature stockpile sampling, obtain the sample by selecting at least ____ increments of material from ____ locations in the stockpile. - Answer-5, random The drying apparatus used for dry preparation of a sample is any suitable device capable of drying samples at a temperature not exceeding _____. - Answer-60*C/140*F A suitable sample splitter is one capable of obtaining ____ portions of the sample without appreciable loss of ____. - Answer-representative, fines