Red Seal Plumbing Practice Exam

At what maximum pressure is the space between the first-stage and the second-stage regulator?

1. 10 psi

2. 50 psi

3. 60 psi

4. 100 psi

The correct answer is: 10 psi

The space between the first-stage and second-stage regulator typically operates at a maximum pressure of 10 psi. This is because the first-stage regulator reduces the pressure of the gas from the high-pressure storage tank to around 10 psi, which is then further regulated by the second-stage regulator to the desired pressure for use. Options B, C, and D are incorrect because they are higher pressure levels that are not typically maintained in this space. This could lead to safety concerns or equipment malfunctions. Alternatively, if the pressure is too low, it may result in poor performance or low gas flow rates. Therefore, the correct answer is A, 10 psi, as it is the recommended maximum pressure for the space between the first-stage and second-stage regulator.