Question 3662 Deck General

The correct answer is C) 200 psi. The maximum setting for the relief valve should be 200 psi, which is 25 psi higher than the required 175 psi discharge pressure needed to maintain the 50 psi pitot tube pressure at the two highest hydrants. This additional 25 psi provides a buffer to prevent the pump from exceeding its designed pressure limits and potentially causing damage. The other options are incorrect because 125 psi (A) is too low to meet the 175 psi requirement, 175 psi (B) is the exact requirement without any buffer, and 225 psi (D) would be an unnecessarily high setting that could put the pump under excessive stress.