ACI Aggregate Testing Technician - Level 1 - Section 1 100% Accurate.

Following are three of the four purposes for which aggregates are sampled; supply the fourth. 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) ___________________ - ANSWER b) For the control of the product at the source of supply Sampling should be done very carefully because it is as important as _____. - ANSWER Testing A variety of people involved in the use of the aggregate samples are responsible for obtaining the samples. True or False? - ANSWER True The _____ or _____ should obtain samples related to the control of production at the source or related to the control of the work at the site. - ANSWER Manufacturers, contractors The purchaser is responsible for obtaining samples for preliminary investigation tests. True or False? - ANSWER False; purchaser is responsible for obtaining samples used in acceptance or rejection decisions Samples to be tested for quality should, when possible, be obtained from the _____. - ANSWER Finished product Appropriate equipment for inspection and sampling should be provided by _____ a) the seller b) the purchaser c) the salesperson d) the user - ANSWER a) the seller Use a ____ method for selecting samples from conveyor belts. - ANSWER Random The four sources from which field samples can be obtained include: 1) flowing aggregate streams; 2) ______ 3) ______ or / and 4) _____ - ANSWER Conveyor belts, stockpiles or transportation units, roadway bases Sampling from stockpiles should follow the standard method for all sampling so that there will be confidence in the results obtained. True or False? - ANSWER False; you should design a sampling plan for the specific case under consideration The number of ______ required by any of the methods depends on the criticality of and variation in the properties to be measured. - ANSWER Field samples The field sample masses are based on the ____ and ____ of tests that will be run. - ANSWER Type, number Shipping containers for aggregate samples should be made so that the contents will not be lost, ____ or ___. - ANSWER Contaminated, damaged The reason it is difficult to obtain unbiased samples from stockpiles is because coarse and fine particles become segregated. True or False? - ANSWER True ____ can help in obtaining accurate samples from stockpiles. - ANSWER Power