Q137
What does the Rock Quality Designation (RQD) indicate?
A.
Degree of rock weathering
B.
Percentage of intact core pieces longer than 10 cm
AnswerC.
Porosity of rock mass
D.
Rock color variation
Answer: Option B
Solution
Answer: Option B
Solution:
RQD is a measure of rock mass quality, based on percentage of solid core pieces longer than 10 cm from a drill core.