Q62
What does RQD (Rock Quality Designation) measure?
A.
Rock color variation
B.
Degree of rock weathering
C.
Quality of rock core recovery
AnswerD.
Depth of borehole
Answer: Option C
Solution
Answer: Option C
Solution:
RQD is a percentage representing the quality of rock core recovery during drilling.It evaluates the degree of jointing and fracture in the rock mass.Correct Answer: Quality of rock core recovery.