Question

A __________ roof drainage system is a system in which the roof drain baffle allows and sustains negative atmospheric pressure in the connected piping and inhibits the mission of air into the piping system hence sustaining fullbore flow and higher flow volume and velocity's.

a: controlled flow
b: primary
c: siphonic
d: secondary

Answer 1

A siphonic roof drainage system is a system in which the roof drain baffle allows and sustains negative atmospheric pressure in the connected piping, inhibiting the admission of air into the piping system, and sustaining full-bore flow with higher flow volume and velocities.

Option C is the answer.

Step-by-step explanation:

In a siphonic roof drainage system, the design encourages the formation of a siphon effect during heavy rainfall. This occurs when the negative pressure created in the piping system enhances the flow of water, allowing for efficient drainage from the roof. The baffle design and the negative pressure characteristics distinguish siphonic systems from traditional gravity-based drainage.

Siphonic roof drainage systems are known for their ability to handle large volumes of water quickly, making them effective in areas with heavy rainfall or for buildings with large roof surfaces.

Option C is the answer.