31. With the exception of cast-iron piping, what is the minimum size cleanout for 4” pipe?
32. What’s the maximum number of drainage fixture units (DFU’s) that can be connected to a 6” drain with a ¼” per 12” slope?
33. What is the minimum size building drain that serves a water closet?
34. What is the minimum size trap for a dishwasher?
35. A sump pit in an elevator shaft has to be how many inches deep minimum?
36. A chemical waste vent shall be independent of the sanitary vent system and shall terminate separately through the roof.
37. A trap is required for all fixtures except which of the following?
38. A two-compartment sink requires how many traps?
39. A drain that supports 20 GPM of grease flow is required to be able to retain how many pounds of grease?
40. Medical gases shall be regulated per the?