Q107
What is the main advantage of rotary drilling over auger boring?
A.
It is faster
B.
It produces disturbed samples
C.
It can penetrate hard rock
AnswerD.
It requires less water
Answer: Option C
Solution
Answer: Option C
Solution:
Rotary drilling is suitable for hard strata and deep formations, which auger boring cannot efficiently penetrate.It uses a rotating drill bit with circulating fluid to cut through rock.