ACI - Aggregate Base Testing Technician Correct Questions & Answers (GRADED A+)

Testing - ANSWER Sampling should be done very carefully because it is as important as ____________. Conveyer belts Transport units Roadways Stockpiles - ANSWER What are the four sources from which field samples can be obtained? contaminated, damaged - ANSWER Sampling containers for aggregate samples should be made so that the contents will not be lost, _____ or _____. Nonrepresentative sample - ANSWER Not using correct procedures for reducing samples to testing size can result in a _____. False - ANSWER T or F Generally, small samples are most representative of the total supply. True - ANSWER T or F There are some instances in which differences between test samples can't be avoided. Laws of chance - ANSWER What determines whether large-size particles are equally distributed among test samples that have been reduced? Method A, mechanical splitter - ANSWER Which method of reducing a sample must be used with fine, dry aggregate? Moisten the sample - ANSWER What must be done to the sample if method B or C is used? Dry the sample - ANSWER What do you do if the sample is wet and Method A is to be used? Coarse aggregate, or mixtures of coarse and fine aggregate - ANSWER Method C, miniature stockpiling, cannot be used for which type of aggregate? Method A - ANSWER Which method involves the use of chutes, holding receptacles, and hoppers or straight-edged pans? 8 - ANSWER Sample splitters must have how many equal width chutes for coarse aggregate? 12 - ANSWER Sample splitters must have how many equal width chutes for fine aggregate? conical pile - ANSWER In Methods B and C the sample is shoveled into a ____ before it is flattened and divided. Canvas blanket or tear resistant tarp - ANSWER When using Method B, what is an alternate surface that can be used when reducing the sample? diagonally opposite - ANSWER When quartering a sample, retain two _________ quarters and reject the other two. 5, random - ANSWER In miniature stockpile sampling, obtain the sample by selecting at least __