Which of the following is NOT an example of subsidence?
a. submerged land in the Gulf of Alaska
b. the low-lying areas of New Orleans
c. Palace of Fine Arts, Mexico City
d. Baytown, Texas
e. The Leaning Tower of Pisa
Q. 2 -
Judge the following sentence according to the criteria given below: The frequency of rockfalls can be
expected to increase with climate change BECAUSE retreating alpine glaciers can be expected to
expose additional steep bedrock-walls.
a. The assertion and the reason are both correct, and the reason is valid.
b. The assertion and the reason are both correct, but the reason is invalid.
c. The assertion is correct, but the reason is incorrect.
d. The assertion is incorrect, but the reason is correct.
e. Both the assertion and the reason are incorrect.
Q. 3 -
What are the most common kinds of landslides?
a. block glides
b. creeps
c. debris flows
d. lahars
e. slumps
Q. 4 -
Which of the following set of circumstances has the greatest risk for debris flows?
a. rainfall for 8 hours with an intensity of 0.2 inches/hour in semiarid California
b. rainfall for 5 hours with an intensity of 0.7 inches/hour in Contra Costa County
c. rainfall for 10 hours with an intensity of 0.4 inches/hour in Marin County
d. rainfall for 12 hours with an intensity of 0.5 inches/hour in Contra Costa County
e. rainfall for 5 hours with an intensity of 0.7 inches/hour in Marin County
Q. 5 -
Judge the following sentence according to the criteria given below: Californian mountain slopes
burned by wildfires are not very susceptible to debris flows the following wet season BECAUSE
scorched chaparral vegetation releases a waxy liquid that waterproofs the ground.
a. The assertion and the reason are both correct, and the reason is valid.
b. The assertion and the reason are both correct, but the reason is invalid.
c. The assertion is correct, but the reason is incorrect.
d. The assertion is incorrect, but the reason is correct.
e. Both the assertion and the reason are incorrect
Q. 6 -
What is a common approach used to deal with collapsible soil when constructing water canals?
a. Waterproof it with an impermeable barrier.
b. Remove all of it and replace it with an engineered fill.
c. Precollapse it by soaking it with water.
d. Use a reinforced concrete lining for the canal.
e. Extend sections of very large diameter pipe through these areas.
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