Question

common drainage problems include all of the following except
clogged
poor support
cross connections
undersized
slopes of ¼ to ½ inch per foot
question 46
a building drain is
a vertical stack that runs up through the roof
the lowest pipe in or under a home that carries sewage to the building sewer
the underground pipe that carries sewage from the building out to the public sewer
the underground pipe that carries sewage from the building to an on - site sewage disposal system
the pipes that run along the street and receive the waste from several houses

Explanation:

Clogged drains, poor support, cross - connections, and undersized pipes are common drainage problems. Slopes of ¼ to ½ inch per foot are proper drainage slopes, not a problem. A building drain is the lowest pipe in or under a home that carries sewage to the building sewer.

Answer:

For the first question: Slopes of ¼ to ½ inch per foot
For the second question: the lowest pipe in or under a home that carries sewage to the building sewer