ACI AGGREGATE TESTING TECHNICIAN - LEVEL 2 EXAM QUESTIONS AND CORRECT ANSWERS 2025/2026

ACI AGGREGATE TESTING TECHNICIAN - LEVEL 2 EXAM QUESTIONS AND CORRECT ANSWERS 2025/2026 AASHTO T 96 LA Machine Small-Size Course Agg. 1. In this test "small-size" coarse aggregate is considered to be aggregate smaller than 19 mm (3/4 in.). True or False? - Answer -False, 1½ in. AASHTO T 96 LA Machine Small-Size Course Agg. 2. The aggregate tested in the Los Angeles Machine is subjected to such actions as _________, ________., ________., and ________ - Answer - Abrasion, attrition, impact, grinding. AASHTO T 96 LA Machine Small-Size Course Agg. 3. What promotes the degradation of the aggregates in the rotating steel drum? - Answer -Steel spheresAASHTO T 96 LA Machine Small-Size Course Agg. 4. This test indicates the relative _________ or __________ of aggregates composed of similar _________ - Answer -Quality or competence; minerals AASHTO T 96 LA Machine Small-Size Course Agg. 5. The Los Angeles Machine consists of a hollow ____________, with an opening for the introduction of the test sample, a dust-tight ______, and a ___________ shelf. - Answer -Steel cylinder; cover; removable steel AASHTO T 96 LA Machine Small-Size Course Agg. 6. A shelf of wear-resistant steel, rectangular in cross section, and mounted on the cover, is preferred. True or False? - Answer -False, a shelf mounted independently of the cover is preferred. AASHTO T 96 LA Machine Small-Size Course Agg. 7. A _________ , __________ speed must be maintained. - Answer - Uniform, peripheral AASHTO T 96 LA Machine Small-Size Course Agg.8. The steel spheres should be 31.8 mm (1-1/4 in.) in diameter and have a mass of 320 g. True or False? - Answer -False; they should average 46.8 mm (1-27/32 in.) and have a mass between 390 and 445 g. AASHTO T 96 LA Machine Small-Size Course Agg. 9. If grading B is used, ____ spheres are needed. - Answer -11 AASHTO T 96 LA Machine Small-Size Course Agg. 10. After the test sample and steel spheres are in