CE 70 Final Exam 2020 PDF

12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Final Examination Due Dec 15, 2020 at 11:59pm Points 95 Questions 38 Available Dec 15, 2020 at 8am - Dec 15, 2020 at 11:59pm about 16 hours Time Limit 180 Minutes Inst...

12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Final Examination Due Dec 15, 2020 at 11:59pm Points 95 Questions 38 Available Dec 15, 2020 at 8am - Dec 15, 2020 at 11:59pm about 16 hours Time Limit 180 Minutes Instructions Please remember that you cannot exit the test once you start. This quiz was locked Dec 15, 2020 at 11:59pm. Attempt History Attempt Time Score LATEST Attempt 1 154 minutes 85 out of 95 Score for this quiz: 85 out of 95 Submitted Dec 15, 2020 at 4:34pm This attempt took 154 minutes. Question 1 1 / 1 pts UC Berkeley Honor Code: As a member of the UC Berkeley community, I act with honesty, integrity, and respect for others. Expectations include: I alone am taking exams with the notes and references allowed and my calculator. I will not use any external devices, such as phones, tablets, or computers, browse or use online sources of information during the entire period exams are available for students to take. I will not take photos, or otherwise make copies of exam questions to share with others. https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 1/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) The consequences for academic dishonesty include: I understand that violating the honor code will result in a grade of “F” for the course. I understand that violating the honor code will result in my referral to the Student Conduct Office for further disciplinary action. Correct! I agree Question 2 2 / 2 pts Plate tectonics is the result of the movement of lithospheric plates caused by Accretion along continental margins Coriolis effect due to earth's rotation Subduction of lithosphere Correct! Convection in the mantle Question 3 2 / 2 pts We know that the Hayward Fault is an active fault because There is documented creep Creek channels are offset along the fault line There are frequent earthquakes along it Correct! All of the answers apply https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 2/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Question 4 2 / 2 pts Highly explosive volcanism is typically associated with Ocean spreading Hot spots Transform faults Correct! Subduction Question 5 2 / 2 pts Glass cannot be scratched by Quartz Topaz Corundum Correct! Calcite Question 6 2 / 2 pts A dark colored, fine grained, massive volcanic rock with a few vesicles is most likely https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 3/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) andesite diorite Correct! basalt gabbro Question 7 0 / 2 pts A rock is most likely a granite if It is a light colored, coarse grained, crystalline rock rock with abundant feldspar and quartz ou Answered It is light colored, coarse grained, crystalline, containing abundant plagioclase and more than 10% quartz orrect Answer It is light colored, coarse grained, crystalline and contains abundant orthoclase feldspar and more than 10% quartz It is light colored, coarse grained, rock with much muscovite and quartz Question 8 2 / 2 pts The mineralogy of andesite corresponds to following igneous intrusive rock https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 4/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) gabbro granodiorite granite Correct! diorite Question 9 2 / 2 pts Saprolite is Deeply weathered rock produced by physical weathering of granite Weathered rock profile above intact rock Deeply weathered rock in a tropical climate Correct! Deeply weathered rock produced by chemical weathering/decomposition Question 10 2 / 2 pts Calcite is a major constituent of limestone and dolostone marble and schist limestone and marl Correct! limestone and marble https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 5/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Question 11 2 / 2 pts Chemical weathering of plagioclase produces K+ in solution, dissolved silica and clay Na+ and Al+3 in solution and clay minerals Correct! Na+, Ca+2 in solution and clay minerals K+ and Ca+2 in solution and clay minerals Question 12 2 / 2 pts The fabric produced by the parallel alignment of platy minerals in a metamorphic rock is called schistosity metamorphic cleavage Correct! foliation lamination Question 13 2 / 2 pts Water table is a groundwater surface defined as https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 6/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) The top of the zone of saturation none of these applies water below the ground surface Correct! The level to which water rises in an open well Question 14 0 / 2 pts An artesian aquifer is An aquifer in which the water level reaches the ground surface orrect Answer A confined aquifer in which the water level rises above the bottom of the confining bed None of these answers ou Answered A confined aquifer in which a well gushes above the ground surface Question 15 2 / 2 pts Hydraulic conductivity depends on the shape of the cone of drawdown The density of the aquifer and water properties The porosity of the aquifer https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 7/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Correct! the properties of the aquifer material and water density and viscosity Question 16 2 / 2 pts The presence of CaCO3 in groundwater means that Correct! the aquifer is limestone or marble the water has been underground for a very short time the water may not be drinking quality the water has been underground a very long time Question 17 2 / 2 pts The angle of repose is The slope on which a landslide stops sliding The angle of friction Typical slope in sedimentary rocks Correct! A slope at which lose granular material just stops sliding Question 18 2 / 2 pts https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 8/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Glacial drift is Till Correct! All types of sediments deposited by a glacier The movement of glaciers Outwash Question 19 2 / 2 pts A landform produced by a stream deposit in an ice tunnel is A kame terrace Correct! An esker A drumlin A moraine Question 20 2 / 2 pts Which of the transporting agents will produce the best sorted material longshore current water Correct! wind https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 9/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) ice Question 21 2 / 2 pts How would you determine that groundwater in a well may be contaminated by surface runoff? Correct! The concentration of nitrate (NO3)- is high The Total Dissolved Solids (TDS) are high The concentration of soluble salts is high The concentration of CaCO3 is high Question 22 2 / 2 pts The probability of a 200-year flood in any given year is 0.1.05.001 Correct!.005 Question 23 0 / 2 pts https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 10/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) A coarse, gravelly ground surface that results from the removal of fine particles by wind erosion in arid areas is orrect Answer desert pavement pediment alluvial fan ou Answered loess Question 24 2 / 2 pts Longshore current will cause erosion both, up current and down current from an obstruction or a pier up current from an obstruction such as a breakwater or a pier as a function of depth Correct! down current from an obstruction such as a breakwater or a pier Question 25 0 / 2 pts The depth of a sea wall is determined by Total depth of beach sediments ou Answered Expected height of storm waves https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 11/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) orrect Answer potential amount of scour during major storms Velocity of the expected waves Question 26 2 / 2 pts Earthquake magnitude is a measure of Correct! Total energy released The stiffness of the rock None of these answers The magnitude of fault displacement Question 27 2 / 2 pts A tall building on deep sediments along the shore of the bay in San Francisco will amplify motion from a distant earthquake _______ than a similar building on bedrock on Telegraph Hill. could be either less about the same Correct! more https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 12/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Question 28 2 / 2 pts An earthquake exceedance of 10% in 50 years corresponds to and earthquake with the following return period 55 95 2475 Correct! 475 Question 29 2 / 2 pts A horizontal line in the plane of a bed is dip ou Answered strike none of these orrect Answer a structural contour Question 30 2 / 2 pts Increasing confining pressure https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 13/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) increases rock brittleness all of these apply Correct! increases rock stiffness increases rock elasticity Question 31 2 / 2 pts The function of a filter in a zoned earthfill dam is to Prevent saturation of the shell Correct! Prevent piping in the core Prevent contamination downstream of the dam Prevent clogging of the drain Question 32 2 / 2 pts A tunnels is being proposed at a site where the horizontal stress σh and the vertical stress, σv ,at the tunnel depth are estimated to be equal. What will be tangential stress at the spring line? 3x σv Correct! 2x σv - σv https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 14/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) σv+σh Question 33 5 / 5 pts Describe and identify the rock sample as follows: a) Rock description - grain size etc. b) Rock class (igneous, metamorphic, sedimentary) c) Name Your Answer: a) light and dark gray banding/foliation, coarse-grained b) metamorphic c) gneiss Question 34 5 / 5 pts What if any problems would you expect with slope stability in this rock at a dam site? Your Answer: Because gneiss is a foliated metamorphic rock, the foliations as a result of the mica in the rock create planes of weakness that the rock can fail on, making it more susceptible to rockslides and landslides. These slope failures can be a large hazard at a dam site because of the risk of flooding due to an unexpected failure, and even with a strong dam structure, the water can be pushed over the top of the dam cause a lot of damage. https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 15/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Question 35 5 / 5 pts Earthquake motion can be characterized by its duration, max. acceleration, and dominant frequency/period. Explain what the significance of these parameters in the evaluation of how a structure might respond to an earthquake. Your Answer: In general, the longer the duration of an earthquake, the more damage occurs to a structure. The natural period of the structure will also determine the max acceleration, and the larger the max acceleration the larger amount of damage. The dominant frequency when it matches or is closer to the natural frequency of the building will do the most damage to a structure since the building essentially amplifies the earthquake motion. Question 36 4 / 4 pts Explain why earthquake shaking will be felt less on the footwall side of a reverse fault. Use a sketch to illustrate your answer. Your Answer: The focus of the earthquake, so where the earthquake originates is closer to the hanging wall and farther from the footwall, and therefore when it reaches the footwall side, more distance would have been traveled which would allow for more of the energy to dissipate and less shaking will be felt. https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 16/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) orrect Answer Except you drew a normal fault Question 37 3 / 3 pts Explain the differences in the functions of a primary and secondary liner in tunnel support. Your Answer: The primary liner in tunnel support serves as the main support system of the tunnel and is essential to the structure. The secondary liner, on the other hand, is a smooth surface on the inside that helps protect from small rocks or icicles falling from the top of the tunnel and also, makes the tunnel more aerodynamic, so if air or water flows through the tunnel there will be less resistance. orrect Answer Question 38 8 / 10 pts The map shows a sequence of sedimentary beds A-E. a) Find the strike and dip of unit B (2 pts) b) Label the top and bottom of the bed (2 pts) c) Determine the vertical thickness of the unit (2 pts) c) A tunnel will be driven at elevation 800 starting at X. Locate the point at which the tunnel will first encounter unit B and then label the length along https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 17/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) which it will be unit B (i.e. find the point at which it will exit unit B). (4 pts) Please put all your answers on the map, showing your work and upload the file as a picture or pdf.  IMG_3589.heic (https://bcourses.berkeley.edu/files/79278109/download) https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 18/19 12/2/21, 8:01 PM Final Examination: Engineering Geology (Fall 2020) Can't quite see where you went wrong on thickness but rest is perfect. Quiz Score: 85 out of 95 https://bcourses.berkeley.edu/courses/1494345/quizzes/2335657 19/19