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Geognostic Survey Methods Quiz

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Questions and Answers

What is the aim of geognostic surveys?

Identifying and characterising the atmosphere
Identifying and characterising the flora and fauna
Identifying and characterising the water bodies
Identifying and characterising the ground (correct)

What is the difference between direct and indirect geognostic surveys?

Direct surveys are only done on-site, while indirect surveys are done remotely
Direct surveys are more accurate than indirect surveys
Indirect surveys involve actual inspection of the ground, while direct surveys infer ground parameters for stratigraphy
Direct surveys involve actual inspection of the ground, while indirect surveys infer ground parameters for stratigraphy (correct)

What determines the number of trenches and drillings in direct onsite surveys?

The distance from the survey site to the nearest city
The extent of the study area and its geological complexity (correct)
The depth of the water bodies in the area
The height of the tallest structures in the area

What is the purpose of bore-hole tests and sample collection for lab tests?

Characterizing physical and mechanical properties of geomaterials (D) Signup and view all the answers

What is the maximum depth for percussion method drilling?

150m (D) Signup and view all the answers

What is the main purpose of using a casing in steel or plastic during drilling?

Prevent the hole from collapsing (A) Signup and view all the answers

What is the speed range for rotary method drilling?

10-15 m/h (D) Signup and view all the answers

When is the percussion method drilling specifically recommended?

Only for not cohesive soils (A) Signup and view all the answers

What is the main purpose of using core drilling with core bit?

Recovery of the whole drilled core (A) Signup and view all the answers

What is the primary purpose of RQD (Rock Quality Designation) assessment?

Quantification of the RQD (B) Signup and view all the answers

What is the ideal sample for characterizing physical and mechanical properties of geomaterials?

Intact core sample (B) Signup and view all the answers

What is the purpose of inclinometric probes?

Landslide monitoring (B) Signup and view all the answers

What is the primary function of an external tube in sampling tube?

Limiting cross-contamination (C) Signup and view all the answers

What is the main purpose of a thin steel tube in sampling tube?