Question

Pressure pushing against the outlet of the trap inside the drainage system is called ______________.

a: siphonage
b: back pressure
c: aspiration
d: trap seal

Answer 1

Back pressure is the term for the pressure that pushes against the outlet of the trap in a drainage system, opposing the trap seal.

Step-by-step explanation:

The pressure that opposes the pressure of a trap seal and pushes against the outlet of the trap in a drainage system is called back pressure. The trap seal is the water barrier that prevents sewer gases from entering through the pipes into a building. Back pressure occurs when the downstream pressure is greater than the upstream or supply pressure, which is typically the result of elevation differences or blockages somewhere in the sewage system.

Answer 2

Pressure pushing against the outlet of the trap inside the drainage system is called b: back pressure.

Step-by-step explanation:

Back pressure refers to the force exerted against the outlet of a trap in a drainage system. This can occur when there is a buildup of pressure within the system, causing water to push back into the trap. Back pressure can lead to issues such as trap seal loss, allowing foul odors and sewer gases to enter the building. Siphonage (Option A) refers to the removal of water from a trap due to a vacuum, aspiration (Option C) is not the term used for pressure against the trap outlet, and trap seal (Option D) is related to maintaining a water seal in the trap to prevent sewer gases from entering.

Option B is the answer.