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------------------------------------------------ The pneumatic output of a 3-15 psi instrument is at 50%. The actual output in pressure is:

A. 3 PSI
B. 6 PSI
C. 9 PSI
D. 15 PSI

Answer :

Final answer:

The pneumatic output of a 3 - 15 psi instrument at 50% equates to an actual output pressure of 9 psi. This is calculated by adding half of the range (6 psi) to the minimum value (3 psi). Therefore correct option C. 9 PSI

Explanation:

The pneumatic output of a 3 - 15 psi instrument at 50% is determined by calculating the midpoint of the range. To find the output, we take the range of 15 psi - 3 psi, which is 12 psi. This full range corresponds to 100%, so 50% of this range is 6 psi. However, since the scale starts at 3 psi, we need to add the 50% value to the starting point, giving us 3 psi + 6 psi which equals 9 psi. Thus, the actual output in pressure is 9 psi.