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A chemical plant operating continuously has two 12-hour shifts, a day

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A chemical plant operating continuously has two 12-hour shifts, a day  [#permalink]

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New post 15 Dec 2019, 09:39
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Question # 75, Date : 14-Dec-2019
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A chemical plant operating continuously has two 12-hour shifts, a day shift and a night shift, during each of which as many as five chemicals can be produced. Equipment limitations and safety regulations impose constraints on the types of chemicals that can be produced during the same shift. No more than two oxidizers can be produced per shift; the same limit holds true for monomers. On either shift, the sum of fire protection standards for all chemicals should be no greater than 13 for health risk, 12 for flammability, and 9 for reactivity. On each of these three dimensions, the standard for any chemical is an integer that ranges from 0 (lowest) to 4 (highest).

Four chemicals have already been chosen for each shift, as shown below:

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Select a chemical that could be added to either shift. Then select a chemical that could be added to neither shift. Make only two selections, one in each column.

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Spoiler: :: OA
Either shift: phenol
Neither shift: nickel carbonyl

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A chemical plant operating continuously has two 12-hour shifts, a day  [#permalink]

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New post 15 Dec 2019, 11:19
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Neither one is : Nickel Carbonyl,since in day shift it would increase the health to 14 (Max 13 is allowed) and in night shift it will increase the reactivity to 10( Max allowed is 9)

Either one : Phenol and Chlorine suit day shift and Phenol, Ethylene and Vinyl Chloride will work for night shift ( after we calculate and check all the parameters per the argument) so the common one is Phenol

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A chemical plant operating continuously has two 12-hour shifts, a day   [#permalink] 15 Dec 2019, 11:19
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A chemical plant operating continuously has two 12-hour shifts, a day

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