1 Which of the following applies to rock as an engineering m

1. Which of the following applies to rock as an engineering material? a. Mechanical strength is independent of pore pressure. b. High Thermal Conductivity c. Mechanical strength increases with depth of burial. d. Mechanical strength decreases with depth of burial. 2. Which of the following fuels produces the least amount of CO2 per BTU\'s of energy produced? a. Lignite coal b. Anthracite coal c. Gasoline d. Natural Gas 3. a. b. Which of the following contains the largest percentage of the World\'s fresh water? Lakes Rivers d. Groundwater aquifers 4. During the past 400000 years of earth history: a. Temperature and atmosphere CO2 concentration have been constant b. Temperatures on average have been much warmer than present day c. When atmosphere CO2 increases, temperature increases d. None of the above 5. When designing hydraulic structures, like bridges, what procedure might reduce total costs? a. Design for high discharge 100 year f b. Minimize initial costs to reduce future maintenance expenses c. Design for a moderate flood with an intermediate recurrence frequency d. All of the above flood 6· lf ocean water albedo is 0.10 and ice or snow albedo is 0.50 what impact does melting ofthe Arctic ice cap have? a. An increase of solar radiation absorbed by the Arctic Ocean b. An increase of solar radiation reflected by the Arctic Ocean C. No change as water and ice are different phases of the same substance d. A 60% increase of solar radiation reflected by Arctic Ocean

Solution

1) mechanical strength increases with depth of burial.

2) anthracite coal

3) ground water aquifers

4) when atmosphere co₂ increases temperature increases

5)  Design for high discharge 100 year flood

6) An increase of solar radiation absorbed by the Arctic Ocean