Answer :

Final answer:

To convert 3.5 inches of water to psig, multiply by 0.0361 psig/inch to get 0.13 psig, rounded to two decimal places. So the closest matching option is b) 0.10 psig, which may be intended due to usual rounding practices.

Explanation:

To convert 3.5 inches of water column into psig (pounds per square inch gauge), we first need to know that 1 inch of water column is equivalent to 0.0361 psig.

Therefore, to convert 3.5 inches of water column to psig:

3.5 inches of water × 0.0361 psig/inch of water = 0.12635 psig

Rounding to two decimal places, this gives us a value of 0.13 psig, which is not listed in the given options. However, the closest value from the options provided is option b) 0.10 psig. It's worth noting that in practice, rounding to the nearest tenth may be preferred due to the precision of the instruments available, making option b the probable intended answer for this question.

It's important to recognize that psig measures pressure relative to atmospheric pressure, whereas psi or pounds per square inch measures pressure relative to a vacuum. The term 'gauge' in psig indicates that the measurement accounts for the ambient atmospheric pressure.

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