PLUMBING TEST GUIDE EXAM 2025/2026 QUESTIONS
WITH 100% CORRECT ANSWERS
Codes require storm drainage systems in all - Commercial and residential buildings
According to the figure above, the drain line with the diameter of 8 inches and a slope of 1/8 per foot
can handle how many drain fixture units (DFUs)? - 1600 DFUs
Tables with drainage fixture units’ values for fixtures can be found in - Local codes
In cold climate, the topmost portion of a vent terminal should be enlarged to prevent - Frost buildup
The proper sizing of a storm drainage system requires the plumber to know the maximum expected
rain during a given period and the - Design rate of removal
The most accurate indicator of the local rainfall is the - 100-year average
If a roof has an area of 3,000 square feet and a design water depth of 6 inches, the number of gallons
of water it can hold is - 1500 cubic feet of water
Water through siphonic roof drain system is achieved by - Suction
Horizontal branches in a roof drainage system are usually installed with a slope of 1/8 inch per foot,
which is elevated to a slope of - 1% grade
The ability of soil to absorb water is its - Permeability
WITH 100% CORRECT ANSWERS
Codes require storm drainage systems in all - Commercial and residential buildings
According to the figure above, the drain line with the diameter of 8 inches and a slope of 1/8 per foot
can handle how many drain fixture units (DFUs)? - 1600 DFUs
Tables with drainage fixture units’ values for fixtures can be found in - Local codes
In cold climate, the topmost portion of a vent terminal should be enlarged to prevent - Frost buildup
The proper sizing of a storm drainage system requires the plumber to know the maximum expected
rain during a given period and the - Design rate of removal
The most accurate indicator of the local rainfall is the - 100-year average
If a roof has an area of 3,000 square feet and a design water depth of 6 inches, the number of gallons
of water it can hold is - 1500 cubic feet of water
Water through siphonic roof drain system is achieved by - Suction
Horizontal branches in a roof drainage system are usually installed with a slope of 1/8 inch per foot,
which is elevated to a slope of - 1% grade
The ability of soil to absorb water is its - Permeability
