A plan shows a floor sink with a 2-inch trap arm running 5 feet 6 inches before connecting to its vent. Per the UPC's trap-arm table, is this installation compliant?
Not quite. The answer is A: No — the UPC caps a 2-inch trap arm at 5 feet, and this 5-foot-6-inch run exceeds it
The UPC caps a 2-inch trap arm at 60 inches — 5 feet — under Table 1002.2, so this run at 5 feet 6 inches is six inches over the limit and not compliant. It's a small enough overage that a candidate who only remembers a rough "about 5 or 6 feet" rather than the exact tabulated number would miss it entirely.
Reference: UPC 2021 Table 1002.2 (Horizontal Lengths of Trap Arms)
Checked against the official text
Table 1002.2 is not supplied at the exam desk and must be memorized. The 2015 edition's table was not read directly; confirm against your 2015 book.
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