PrepTest 125 - Section 1 - Passage 2 - Question 10

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Passage A.

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Facts about drilling muds · Function

Lubricate parts of oil well drills, clean drill parts, give info about what's happening during drilling.

Facts about drilling muds · What's in them

Barite is the largest ingredient in drilling muds.

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Facts about drilling muds · "Recipes"

Different companies have their own drilling mud "recipes." This makes it difficult to study environmental effects of drilling muds.

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Facts about drilling muds · Released during drilling phase, highly regulated and controlled

One kind of drilling mud · Water-based mud (WBM)

Used for shallow wells. Not very toxic. Dumped directly overboard.

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Another kind of drilling mud · Oil-based mud (OBM)

Used for deeper wells. More mineral oil and more barite than WBM. More environmentally damaging than WBM. Only residue of OBM can be dumped overboard.

Passage Style

10.

Each of the following is █████████ ██ ███ ██ ████ ██ ███ ████████ ███████

Question Type

Implied

This Inference EXCEPT question asks for the answer that is NOT supported by either passage.

Split Approach: After passage A, eliminate each answer choice that is supported by passage A. Then, after passage B, eliminate any remaining answer choices that are supported by passage B.

Sequential Approach: We will approach this question using the process of elimination, eliminating each answer choice that is supported by one (or both) of the passages.

Drillers monitor the ███████████ ██ ███ ███ ████ ███ ██████

This is supported by passage A. In P1, we see that drillers monitor the drilling fluid, and P3 says that there are different recipes to handle different jobs. This supports the claim that drillers monitor the mud for suitability to the job, so we can eliminate (A).

The government requires ████████ █████████ ██ ████████ ███ ███████████ ████ ██ █████ ████████ █████

This is anti-supported by passage A. P3 of passage A tells us that many ingredients of drilling fluids are kept secret.

This is unsupported by passage B. passage B does say that the industry is tightly regulated, but it does not indicate that companies are required to disclose all ingredients.

(B) is anti-supported by passage A and unsupported by passage B, so this is our answer.

84%

In certain quantities, ██████ ██ ███ █████ ██ ███████

This is supported by passage A. P2 of passage A shows us that barite is consumed by humans, so we can infer that, in certain quantities, it’s not toxic to humans.

Oil reserves can ██ █████ ██████ ██ ███████ ██████ ██ █████

This is supported by passage A. In P1 of passage A, we see that drillers are drilling into rocks to find oil, so we can infer that oil reserves can be found within or beneath layers of rock.

Drilling deep oil █████ ████████ ███ ███ ██ █████████ ███ ███████ ████ ████ ████████ ███████ ███ ██████

This is unsupported by passage A. However, this is supported by passage B, which tells us that WBMs are used to drill shallow parts of wells and OBMs are used for deeper wells.

PrepTest 125 - Section 1 - Passage 2 - Question 10

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