PrepTest 125, Section 1, Question 8
Passage A Drilling fluids, including the various mixtures(466 more words not shown)
Passage A(240 more words not shown)
Passage B(234 more words not shown)
Each of the following is(9 more words not shown)
- AClay is an(9 more words not shown)
- BAt least one(11 more words not shown)
- CThere has been(9 more words not shown)
- DGovernment regulations allow(8 more words not shown)
- EDuring the drilling(12 more words not shown)
Reading the passage
This EXCEPT question changes the rule: support from either account is enough to eliminate a choice. We aren't looking for a point they both make. I'll check which four claims we can support, leaving the one that adds something unjustified.
Working the answers
- A
A lists bentonite and other clays as ingredients, and B includes bentonite clay in water-based mud. Clay's role is supported.
- B
B says water-based mud is not especially poisonous to sea life (Passage B, paragraph 2). That supports the modest claim that at least one type isn't significantly toxic; neither wording means completely harmless.
- C
A explicitly identifies a problem in studying drilling-waste effects. B also reports environmental differences and effects on organisms. Some study is supported; we don't need a named experiment or a detailed research history.
- D
B describes oil-based mud as normally used with about 30 percent mineral oil within this regulated activity. That supports permission to use such a mixture. Don't confuse it with permission to dump that entire mixture overboard, which B separately restricts.
- ECorrect
Released during the drilling phase doesn't mean released continuously throughout that phase. B describes recycling water-based mud and then discharging a batch over several hours. Continuous discharge isn't established.
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