Eosc 114 Landslides Exam Questions with Complete Solutions Rated A+

Eosc 114 Landslides Exam Questions with Complete Solutions Rated A+ Which would NOT cause a landslide? - Answers Adding the same amount of material to the driving mass and the resisting mass A landslide trigger ________. - Answers can be anthropogenic in origin Which statement is FALSE? A. Quick clays can liquefy only after significant shaking such as during an earthquake. B. The shear strength of sediments is lower than that of rocks. C. The area within and near UBC is in danger of landslides. D. Landslide velocities can range from a few millimeters/year to a few meters/second. E. Gravity is the ultimate cause of all landslides. - Answers Quick clays can liquefy only after significant shaking such as during an earthquake With regard to landslides, shear strength is _____. A. the cohesion between grains in a rock or sediment sample B. the degree to which the surface tension of water holds material together C. a combination of all the factors causing geologic materials to resist shear stress D. a combination of composition, density, and electromagnetic attraction within geologic materials E. slope steepness plus composition - Answers a combination of all the factors causing geologic materials to resist shear stress Compared to developed countries, countries in the developing world are likely to have _____ due to landslides. a) higher property damage and lower death counts b)lower property damage and higher death counts c) higher property damage and higher death counts d)lower property damage and lower death counts e)about the same property damage and lower death counts - Answers lower property damage and higher death counts Calculate the return period of a debris flows in British Columbia using the following data: 1930: Meager Creek/Pemberton 1957: Prince Rupert 1972: Sparwood 1990: Philpott Road in Kelowna A. 10 years B. 15 years C. 27 years D. 30 years E. 60 years - Answers D. 30 years landslide is more likely to occur when ________. A. Gp > Gt B. Gt > Gp C. Gt = Gp D. (Gp + Gt) < gravity E. (Gp - Gt) < gravity - Answers B Gt>Gp The factor of safety is the ratio of __________. A. Gp to Gt B. shear stress to shear strength C. shear strength to shear stress D. the sum of Gp and Gt to shear strength E. shear strength divided by Gp - Answers C.shear strength to shear stress Which of the following factors would be MOST likely to trigger a landslide on the coast of BC? A. earthquake B. undercutting C. overloading D. heavy rainfall E. removal of vegetation - Answers D. Heavy rainfall True or False about flows ? An example of a very fast moving flow (> 75 km/hour) is rock creep. - Answers False Water in a layer of unconsolidated sediment can lead to landslides as a result of _______. A. increased cohesion B. vegetation growth C. decreased pore water pressure D. increased pore water pressure E. a decrease in the slide mass - Answers D. increased pore water pressure Shear strength directly depends on which of the following? A. slope composition B. slope gradient C. shear stress D. earthquake frequencies