Code and Fixture Calculations Exam 120
Questions And Correct Answers Already
Graded A+ 2026-2027.
Minimum size of a trap for a shower drain (Scenario 6) - ANSWER-1-1/2 inch
Water heater T&P relief valve discharge requirement - ANSWER-6 inches from
the floor
3 inch - ANSWER-A size measurement for pipes.
4 inch - ANSWER-A size measurement for pipes.
5 inch - ANSWER-A size measurement for pipes.
,6 inch - ANSWER-A size measurement for pipes.
DFUs for a 3-inch vent (UPC) - ANSWER-24
Minimum air gap for a 3/4-inch water supply pipe (Scenario 7) - ANSWER-1
inch.
Minimum slope for a 4-inch horizontal drainage pipe - ANSWER-1/4 inch per
foot
DFUs for a private bathroom water closet (UPC) - ANSWER-3
Maximum trap arm length for a 3-inch trap - ANSWER-8 feet
, Required pipe size for a gas line run of 75 feet with 175,000 BTUs demand
using 0.3 psi tables - ANSWER-1 inch
Minimum required size of a building sewer for a single-family residence -
ANSWER-4 inch
DFUs a 3-inch vent can carry (UPC) - ANSWER-36
Minimum air gap for a 3/4-inch water supply pipe - ANSWER-1 inch
Minimum burial depth of a building sewer (UPC) - ANSWER-12 inches
DFUs assigned to a bathtub (UPC) - ANSWER-2