PT125.S1.P2.Q12 > Analytics

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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

12.

According to passage B, one ██████ ████ ███ ███████████ ████ ███████████████ ████████ ████ ████ ██ ████ ████

Question Type

Stated

This Stated question asks for a reason that passage B says that OBMs may be more environmentally damaging than WBMs. In P6 of passage B, we see that OBMs are potentially more environmentally damaging because they don’t disperse as readily.

are slower to ████████

This is stated in P6.

95%

contain greater concentrations ██ █████████

Passage B doesn’t say that OBMs contain a greater concentration of bentonite than WBMs, so this is not the reason that passage B states that OMBs may be more environmentally damaging than WBMs.

contain a greater ██████ ██ █████████

Passage B doesn’t say that OBMs contain a greater number of additives than WBMs, so this is not the reason that passage B states that OMBs may be more environmentally damaging than WBMs. Both WBMs and OBMs contain additives; we don’t know which contains a greater number of additives. We also don’t know how these additives impact the environment.

are used for ████████ ██████ █████

This is stated about OBMs, but this isn’t the reason that OBMs may be more environmentally damaging.

cannot be recycled

Passage B doesn’t say that OBMs can’t be recycled, so this is not the reason that passage B states that OMBs may be more environmentally damaging than WBMs.

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PrepTest 125 - Section 1 - Passage 2 - Question 12

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PrepTest 125 - Section 1 - Passage 2 - Question 12

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