PLUMBING REVISED MOCK EXAM 2025/2026 QUESTIONS
WITH 100% CORRECT ANSWERS
The most accurate indicator of local rainfall is the - 100-year average
The ability of soil to absorb water is called - Permeability
Siphonic roof drain system are engineered drainage system that operate by - Suction
Plumbers usually installer horizontal branches with 1/8 slope in 12 inches of pipe is equal - A 1-
percent slope
A 8 inch pipe diameter how many DFUs in 1/8 slope per food - 1,600
When a DFUs value has not been determined use the standard value of - 7.5 gpm
The same amount of rainfall is equal in volume - 1.25 gallons
A 6-inch horizontal pipe in 1/8 ,1/4 and 1/2 unit vertical slope rainfall are - In 1/8 - 10,700
1/4- 15,100
1/2- 21-400
To prevent frost buildup in the vent pipe enlarge the section of pipe that extends above the roof -
Cause by water in the ven air condensing and buildup in the inside of the vent pipe and come in
contact with could outside air
WITH 100% CORRECT ANSWERS
The most accurate indicator of local rainfall is the - 100-year average
The ability of soil to absorb water is called - Permeability
Siphonic roof drain system are engineered drainage system that operate by - Suction
Plumbers usually installer horizontal branches with 1/8 slope in 12 inches of pipe is equal - A 1-
percent slope
A 8 inch pipe diameter how many DFUs in 1/8 slope per food - 1,600
When a DFUs value has not been determined use the standard value of - 7.5 gpm
The same amount of rainfall is equal in volume - 1.25 gallons
A 6-inch horizontal pipe in 1/8 ,1/4 and 1/2 unit vertical slope rainfall are - In 1/8 - 10,700
1/4- 15,100
1/2- 21-400
To prevent frost buildup in the vent pipe enlarge the section of pipe that extends above the roof -
Cause by water in the ven air condensing and buildup in the inside of the vent pipe and come in
contact with could outside air
