Question 9

A uniform gauge pressure of 5 psi is required for the air test of a drainage and vent system.

The air test mandates that a drainage and vent system maintains a uniform gauge pressure of 5 psi to ensure the integrity and functionality of the system.

A) 2 psi

While 2 psi is a pressure measurement, it does not meet the standard requirements for the air test of a drainage and vent system, which specifies a higher pressure to adequately test for leaks and ensure proper operation.

B) 5 psi

This is the correct option, as the air test for a drainage and vent system explicitly requires a uniform gauge pressure of 5 psi to confirm the system's ability to hold air without any leaks.

C) 10 psi

10 psi exceeds the required pressure for the air test of a drainage and vent system. Testing at this pressure could lead to unnecessary stress on the system components and is not in accordance with standard testing protocols.

D) 50 psi

50 psi is significantly higher than the required pressure for the air test and would likely result in damage to the system or an inaccurate assessment of its integrity. Such a high pressure is not permissible for this testing procedure.

Conclusion

The requirement for a uniform gauge pressure of 5 psi is critical to ensuring that the drainage and vent system is properly tested for leaks and operational integrity. Options A, C, and D either fall short of or exceed the necessary pressure, thus failing to meet the established standards for the air test.