Under 2021 IPC Table 704.1, what is the minimum slope for a 4-inch horizontal building drain not upstream of a grease interceptor?
Correct Answer
C) 1/8 in. per ft
Under the named table, a 4-inch pipe has a minimum slope of 1/8 inch per foot. The 1/4 and 1/2 choices exceed that minimum; they are not automatically prohibited. Piping upstream of a grease interceptor has a separate requirement and is excluded. Source: https://codes.iccsafe.org/s/IPC2021P1/chapter-7-sanitary-drainage/IPC2021P1-Ch07-Sec704.1
Why This Is the Correct Answer
Under the named table, a 4-inch pipe has a minimum slope of 1/8 inch per foot. The 1/4 and 1/2 choices exceed that minimum; they are not automatically prohibited. Piping upstream of a grease interceptor has a separate requirement and is excluded. Source: https://codes.iccsafe.org/s/IPC2021P1/chapter-7-sanitary-drainage/IPC2021P1-Ch07-Sec704.1
Independent practice; verify any reference hint against the edition and category permitted for your booking. Official exam and reference-list sources →
More NASCLA Questions
A contract permits payment for stored materials only with specified documentation. Which submission supports that payment review?
A tempered glass panel is 5 ft by 9 ft. The supplier weight is 6.5 lb per square foot. What is the panel weight before hardware?
The owner will buy major equipment directly, while the contractor remains responsible for coordination and installation. What must be clarified before the purchase is released?
Which minimum eccentric gravity load and distance does OSHA 1926.755(a)(2) specify for the column anchor-rod assembly during erection?
Using 1 refrigeration ton = 12,000 Btu/h, how many tons of cooling correspond to a scheduled capacity of 180,000 Btu/h?
On the supplied schematic practice drawing (S-741), what is the sum of the three printed chain dimensions? Use the dimension labels rather than scaling the sloping graphic.
Why are backfill lifts limited in thickness?
The specified resilient flooring and adhesive require slab moisture and pH checks before installation. Testing has not been completed, but the crew wants to meet turnover. What should happen?
The approved backfill procedure limits loose lifts to 8 inches for this soil and compactor. A crew places one 24-inch loose lift. What should be done?
Under 2021 IBC 1507.7.2, what is the minimum roof-deck slope for natural slate shingles?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass
Related Study Resources
Previous Question
On the supplied schematic practice drawing (C-787), what is the sum of the three printed vertical segment dimensions? This exercise tests reading dimensions, not a code-required assembly size.
Next Question
The project inspection plan requires a witnessed water-riser pressure test before joints are insulated. The riser is insulated first and a leak later appears. What quality step was missed?