SWES 200 exam 2 2008

SWES 200 exam 2 2008 - SWES 200 EXAM 2 Useful facts Name...

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SWES 200, EXAM 2 Name _______________________ March 13, 2008 Seat ________ Row __________ Useful facts: Particle density = 2.65 g/cm 3 Volume of a cylinder = height x radius x 3.14 2 Density of water = 1 g/cm 3 True/False (1 point each) 1. T or F Compared to the atmosphere, the air in soil pores is likely to have higher levels 2 of CO 2. T or F Compared to the atmosphere, the air in soil pores is likely to have higher levels 2 of O . 3. T or F Soil structure is determined by soil texture and can not be changed by management practices. 4. T or F The AASHTO soil classification system describes engineering properties of soils. 5. T or F Most layer silicate clay particles are positively (+) charged. 6. T or F A gleyed soil is indicative of extended water-logging conditions. 7. T or F Cation exchange capacity of Al and Fe oxides increases as pH increases. 8. T or F A layer of sand in the profile of a clay loam soil will increase the rate of unsaturated water flow through the soil. 9. T or F In a given soil, saturated water flow is faster than unsaturated water flow. 10. T or F Water in soil has lower (more negative) free energy than pure water outside the soil. Multiple Choice (2 points each) 11. At a matric potential of -30 kPa, which of the following soils will hold the greatest amount of water? a. Loamy sand b. Clay loam c. Loam d. All will hold the same amount of water
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