CEE380_EXTRA CREDIT1_S16(2) - UNIVERSITY OF ILLINOIS...

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UNIVERSITY OF ILLINOIS, URBANA-CHAMPAIGN NAME: _______________ DEPARTMENT OF CIVIL & ENVIRONMENTAL ENGINEERING DATE: ______ Team:____ 1 CEE 380 Professor Cassandra Rutherford Extra Credit Exam I UNIVERSITY OF ILLINOIS, URBANA-CHAMPAIGN DEPARTMENT OF CIVIL & ENVIRONMENTAL ENGINEERING Due: March 4, 2016 Name: ______________________________________ Signature: ______________________________________ Team: _________ NOTE: -Show your complete calculation and explanations (attached on separate engineering paper) to receive credit. Failure to do so will result in zero credit for the problem. -You are not allowed to work together on these problems -Clearly select only one answer. If you select more than one answer, you will not receive credit even if one of your selections is correct.
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UNIVERSITY OF ILLINOIS, URBANA-CHAMPAIGN NAME: _______________ DEPARTMENT OF CIVIL & ENVIRONMENTAL ENGINEERING DATE: ______ Team:____ 2 CEE 380 - Spring 2016 EXTRA CREDIT EXAM 1 Due Feb. 26, 2016 PART A 1. The following laboratory test results for Atterberg limits and particle size distribution (sieve analysis) were obtained for a soil. Particle size distribution ( Percent Passing) Sieve no, B3 (10-11ft) no. 4 (4.75mm) 80 No.10 (2.00mm) 60 No.40 (0.425mm) 30 No.200 (0.075mm) 10 Atterberg limits Liquid limit 31 Plastic limit 25 Classify the soil according to the USCS. (A) SM (B) SP (C) SW-SC (D) SW-SM 2. Commencing from 2ft below the ground surface and using the SPT split-barrel sampler driven 18in, the following blow count data was obtained in increments of 6in: 10, 15, 19. What is the N- value to be reported on the boring log for the depth of 3ft. (A) 19 blows/ft (B) 25 blows/ft (C) 34 blows/ft (D) 44 blows/ft 3. A field tecnician obtains a soil sample from a clay liner under construction at a landfill closure projecet. Specifications require the clay liner to be compacted to a maximum dry denstiy of 108.9lbf/ft 3 and an optimum mositure content of 16%. If the initial moist sample weight is 5.0 lbf and the final dry sample weight after oven drying is 4.4 lbf, what is the difference between the field moisture content and the specified optimum moisture content of the liner material? (A) 2% (B) 4% (C) 14% (D) 72%
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UNIVERSITY OF ILLINOIS, URBANA-CHAMPAIGN NAME: _______________
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