Plumbing 2026 exam Page 1
Above ground PEX piping installed horizontally shall be C. 32"
supported at intervals not to exceed _________.
A. Depends on the pipe size
B. 24"
C. 32"
D. 36"
An air gap has minimum requirement of at least 1" or ___ C. 2
times the diameter of the pipe.
A. 1
B. 1.5
C. 2
D. 3
All fire-resistance rated through-penetration assemblies must C. E 814
be qualified by testing in accordance to ASTM ___
A. E 2596
B. E 216
C. E 814
D. E 828
All gas water heaters or other gas appliances that are B. In the same story
connected to a common vent shall be located ___
A. In the same lot
B. In the same story
C. Not over 10' from a vent
D. In the same building
Plumbing 2026 exam 2/5/2026
,Plumbing 2026 exam Page 2
All horizontal drains shall be provided with cleanouts D. 100
located no more than ___ feet apart
A. 50
B. 75
C. 80
D. 100
All trenches deeper than the footing of any building or A. 45 degree therefrom
structure and paralleling the same must be at least _____
A. 45 degrees therefrom
B. 4' therefrom
C. 2' therefrom
D. 90 degrees thereform
Any pressure less than that exterted by atmosphere is A. Vacuum
A. Vacuum
B. Negative Pressure
C. Positive Pressure
D. Atmospheric Pressure
An area drain is C. Catch basin
A. Roof drain
B. Sump
C. Catch basin
D. All of the above
Plumbing 2026 exam 2/5/2026
,Plumbing 2026 exam Page 3
A backwater valve is used ____ D. To prevent reverse flow in a drainage system
A. To back water up the pipe
B. To protect the system from backsiphonage
C. To act as a bypass
D. To prevent reverse flow in a drainage system
A barometric loop is ____ above the highest piping A. 33.9 degrees
A. 33.9 degrees
B. 39.3 degrees
C. 11.5 degrees
D. 43.3 degrees
Blowback water closets can be installed back to back when E. Both B and D
they share a common back wall. What fitting will you show
in your plumbing design to receive the discharge from the
two toilets? Remember that they could each discharge at the
same time.
A. Double sanitary tee
B. Double combination and wye
C. Cross tee
D. Baffled tee
E. Both B and D
A branch can be in any part of the plumbing system except D. Any of the above
A. Main
B. Riser
C. Stack
D. Any of the above
Plumbing 2026 exam 2/5/2026
, Plumbing 2026 exam Page 4
Building sewers shall be tested by completely filling the C. Lowest to at least 10' head
sewer with water from the ______
A. Lowest to highest point
B. Lowest to at least 5' head
C. Lowest to at least 10' head
D. Lowest to at least ground level
Chemical or industrial liquid wastes which are likely to C. Pretreated to render them innocuous
damage th public sanitary sewer system shall _______
A. Be drained into a holding tank
B. Not be used under any conditions
C. Pretreated to render them innocuous
D. Be drained into a storm drain
Cleanout plugs shall be brass or plasic, or other approved D. All of the above
materials
A. Brass
B. Plastic
C. Other approved fittings
D. All of the above
Cleanouts on 6" and smaller pipes shall be provided with a B. 18
clearance of no less than ___ inches for rodding.
A. 12
B. 18
C. 24
D. 36
Plumbing 2026 exam 2/5/2026
Above ground PEX piping installed horizontally shall be C. 32"
supported at intervals not to exceed _________.
A. Depends on the pipe size
B. 24"
C. 32"
D. 36"
An air gap has minimum requirement of at least 1" or ___ C. 2
times the diameter of the pipe.
A. 1
B. 1.5
C. 2
D. 3
All fire-resistance rated through-penetration assemblies must C. E 814
be qualified by testing in accordance to ASTM ___
A. E 2596
B. E 216
C. E 814
D. E 828
All gas water heaters or other gas appliances that are B. In the same story
connected to a common vent shall be located ___
A. In the same lot
B. In the same story
C. Not over 10' from a vent
D. In the same building
Plumbing 2026 exam 2/5/2026
,Plumbing 2026 exam Page 2
All horizontal drains shall be provided with cleanouts D. 100
located no more than ___ feet apart
A. 50
B. 75
C. 80
D. 100
All trenches deeper than the footing of any building or A. 45 degree therefrom
structure and paralleling the same must be at least _____
A. 45 degrees therefrom
B. 4' therefrom
C. 2' therefrom
D. 90 degrees thereform
Any pressure less than that exterted by atmosphere is A. Vacuum
A. Vacuum
B. Negative Pressure
C. Positive Pressure
D. Atmospheric Pressure
An area drain is C. Catch basin
A. Roof drain
B. Sump
C. Catch basin
D. All of the above
Plumbing 2026 exam 2/5/2026
,Plumbing 2026 exam Page 3
A backwater valve is used ____ D. To prevent reverse flow in a drainage system
A. To back water up the pipe
B. To protect the system from backsiphonage
C. To act as a bypass
D. To prevent reverse flow in a drainage system
A barometric loop is ____ above the highest piping A. 33.9 degrees
A. 33.9 degrees
B. 39.3 degrees
C. 11.5 degrees
D. 43.3 degrees
Blowback water closets can be installed back to back when E. Both B and D
they share a common back wall. What fitting will you show
in your plumbing design to receive the discharge from the
two toilets? Remember that they could each discharge at the
same time.
A. Double sanitary tee
B. Double combination and wye
C. Cross tee
D. Baffled tee
E. Both B and D
A branch can be in any part of the plumbing system except D. Any of the above
A. Main
B. Riser
C. Stack
D. Any of the above
Plumbing 2026 exam 2/5/2026
, Plumbing 2026 exam Page 4
Building sewers shall be tested by completely filling the C. Lowest to at least 10' head
sewer with water from the ______
A. Lowest to highest point
B. Lowest to at least 5' head
C. Lowest to at least 10' head
D. Lowest to at least ground level
Chemical or industrial liquid wastes which are likely to C. Pretreated to render them innocuous
damage th public sanitary sewer system shall _______
A. Be drained into a holding tank
B. Not be used under any conditions
C. Pretreated to render them innocuous
D. Be drained into a storm drain
Cleanout plugs shall be brass or plasic, or other approved D. All of the above
materials
A. Brass
B. Plastic
C. Other approved fittings
D. All of the above
Cleanouts on 6" and smaller pipes shall be provided with a B. 18
clearance of no less than ___ inches for rodding.
A. 12
B. 18
C. 24
D. 36
Plumbing 2026 exam 2/5/2026
