Review Quiz Section 6

	1. A cohesive soil with an unconfined compressive strength of _____ tsf may be classified as a Type A. a) 0.4 b) 1.2 c) 1.6 d) both b and c. e) none of the above.

	2. If an entire soil sample can pass through a No. 100 sieve, it contains 100% fines. a) True b) False

	3. The USCS soil classification system is mainly used by a) geologists. b) engineering consulting companies and soil-testing laboratories. c) state highway transportation officials. d) particle physicists.

	4. If you know the weight of a soil sample both moist and dry, you can determine its water content. a) True b) False

	5. For the USCS, the symbol G corresponds to a) silt. b) well graded. c) clay. d) sand. e) none of the above.

	6. For a simple slope excavation, a Type B soil should have a slope of a) 1 ˝ horizontal to 1 vertical distance. b) 1 horizontal to 1 vertical distance. c) ž horizontal to 1 vertical distance. d) none of the above.

	7. The unconfined compressive strength of a clay soil is about _________ the cohesion of the soil. a) half b) equal to c) twice d) four times e) none of the above

	8. The water content of a soil can be larger than 100%. a) True b) False

	9. The approximate soil pressure (in the vertical direction) at a depth of 10 ft for an average soil is a) 100 lb/ft² b) 1000 lb/ft² c) 10,000 lb/ft² d) 100,000 lb/ft²

	10. A soil with a large coefficient of uniformity (via a grain-size distribution curve) is a soil that a) has particles all about the same size. b) always contains a large % passing by weight for a number 200 sieve. c) always contains a large % passing by weight for a 3/8 in sieve. d) has particles with diverse sizes.

For questions or comments regarding these pages contact Dr. Alan Scott / scotta@uwstout.edu / this page was last updated September 14, 2006