Question

the causes of poor slope on drainage piping include all of the following except
poor installation
building settlement or heaving
hanger problems
mechanical damage or joint failure
double trapping
question 48
what is a wet vent?
a hose attached to a sink drain
a counter top spray wand in the kitchen
when the cap is missing from the water heater vent flue
a vent which also serves as a drain
when a clothes dryer is located near a laundry sink

Explanation:

For the first question, poor installation, building settlement/heaving, hanger problems, and mechanical damage/joint - failure can all cause poor slope in drainage piping. Double trapping is not a cause of poor slope. For the second question, a wet vent is a vent which also serves as a drain.

Answer:

1. E. double trapping
2. D. a vent which also serves as a drain