Question:
For soft sensitive soil, the area ratio of sampler ______
For soft sensitive soil, the area ratio of sampler ______
Show Hint
Recommended area ratio:
\[
\boxed{
\begin{aligned}
\text{Soft sensitive soil} &\le 10\%\\
\text{General undisturbed sampling} &\le 20\%
\end{aligned}
}
\]
Updated On: Jul 23, 2026
- Should not exceed \(20\%\)
- Should not exceed \(10\%\)
- Should not exceed \(15\%\)
- Should not exceed \(40\%\)
Show Solution
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The Correct Option is B
Solution and Explanation
Step 1: Recall the definition of area ratio.
The area ratio of a sampler is
\[
A_r=\frac{D_o^2-D_i^2}{D_i^2}\times100\%
\]
where
- \(D_o\) = Outside diameter of cutting edge
- \(D_i\) = Inside diameter of cutting edge
Step 2: Recall the recommended value. For obtaining undisturbed samples of soft sensitive soils, the sampler should have a small area ratio. The recommended value is \[ \boxed{A_r\le10\%} \] Hence, \[ \boxed{(B)} \] is the correct answer.
Step 2: Recall the recommended value. For obtaining undisturbed samples of soft sensitive soils, the sampler should have a small area ratio. The recommended value is \[ \boxed{A_r\le10\%} \] Hence, \[ \boxed{(B)} \] is the correct answer.
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