Ground Investigation in Civil Engineering Quiz

What is a desk study in the context of ground investigation?

• A study conducted on-site to collect soil samples

• A preliminary study using available information to assist in planning fieldwork

• A study to determine the economic feasibility of a project

• A study to assess the environmental impact of a project on a site

What is the typical range for the spacing of investigation points for high-rise and industrial structures?

• 5-10 m

• 15-40 m

• 20-50 m

• 25-75 m

What is the recommended action if rock is encountered during an investigation?

• Stop the investigation immediately

• Penetrate at least 3 m in more than one location

• Use a different type of foundation

• Increase the number of boreholes

What is the cost range of a ground investigation as a percentage of the project cost?

• 3-5%

• 5-10%

• 10-15%

What should be done to boreholes and trial pits after use?

• Leave them open

• Backfill with compacted soil

• Fill with water

• Cover with concrete

What is the maximum depth to which trial pits are typically excavated?

• 3-5 meters

• 6-7 meters

• 8-9 meters

What is the primary purpose of using trial pits in ground investigation?

• To install underground utilities

• To visually examine in-situ soil conditions

• To create drainage systems

• To plant trees

What is the primary function of continuous-flight augers?

• To raise soil to the surface without withdrawal

• To measure soil moisture content

• To compact soil layers

In wash boring, what is used to loosen and break up the soil?

• Manual digging

• Explosives

• Water jets and cyclic vertical movement of the chisel

• Chemical solutions

What is a disadvantage of wash boring in terms of soil sample collection?

• It is too fast for accurate sampling

• It is unacceptable for obtaining soil samples

• It mixes soil layers too thoroughly

• It is too expensive