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ICC COMMERCIAL PLUMBING INSPECTOR EXAM
2025/ 2026 ACTUAL EXAM CURRENTLY TESTING
COMPLETE 450 EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS WITH RATIONALES /ALREADY
GRADED A+||LATEST VERIFIED EXAM!!!||
A journeyman plumber and an apprentice, who are
employed by a master plumber, are installing the DWV-
system and water distribution system in a 2-½ story single
family dwelling. QUESTION: What answer below shall be
considered most correct to complete the following
"Plumbing code knowledge" related statement: A trap that
serves a single shower stall that is equipped with a hand
shower, a rain head, and a standard shower head shall be
no less than ________ in minimum diameter
A) 1-½" B) 2" C) 2-½" D) 3" - Answer-2 inches
A journeyman plumber and apprentice are installing 3-inch
floor drains in an open-parking-garage that is subject to
freezing temperatures. QUESTION: What answer below
shall be considered most correct to complete the following
"Plumbing code knowledge" related statement: The
installation of traps at the floor drain locations which are
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found susceptible to freezing temperatures may be
__________.
A)Increased to 4-inch B) Eliminated C) Wrapped with
freeze protection cable D) Insulated - Answer-eliminated
A journeyman plumber and apprentice are installing lab
sinks with faucets that are connected to an acid waste
system for-(special hazardous waste) in a medical lab.
What answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: Vacuum breakers shall be installed with the
critical level at least _____-inches above the flood level
rim of the fixture they serve and on the discharge side of
the last control valve to the fixture.
A) 12 B) 6 C) 18 D) 3 - Answer-6 inches
What answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: No plumbing permit shall be issued for cross
connection installations that require ______________ until
the application for a permit is accompanied by a letter of
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approval from the Massachusetts Department of
Environmental Protection or its designee.
A) RPBP B) A "critical level" height C) Atmospheric
vacuum breakers D) Water recycling systems - Answer-
reduced pressure backflow preventer (RPBP)
: What answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: The waste discharge from safe waste pans
serving water heaters or hot water storage tanks where
there is _______ below and shall be piped indirectly to a
properly trapped and vented fixture.
A) People B) Occupancy C) Floors D) Plumbing
connections - Answer-occupancy
GIVEN: A journeyman plumber and an apprentice, (who
are employed by a master plumber), are installing the
sanitary DWV and water distribution system in a five-story
residential condominium complex. QUESTION: What
answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: CPVC-(Chlorinated Polyvinyl Chloride) pipe
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and fittings may be used provided that none of this
material is located within ____-inches of any connection to
a hot water tank as defined in MGL. c. 142, § 17
A) 12 B) 18 C) 20 D) 24 E) 30 - Answer-24 inches
: A journeyman plumber and apprentice are roughing-in
multiple fixtures in a new fitness center. The facility will
include a juice bar, temporary daycare room, men's and
women's toilet facilities and men's and women's locker
rooms. QUESTION: What answer below shall be
considered most correct to complete the following
"Plumbing code knowledge" related statement: A
________-vent is a branch vent that serves two or more
floor-outlet fixtures that are battery wasted. The vent
extends from the top of the horizontal soil and/or waste
branch in front of the last fixture waste and connects to a
vent stack or stack vent that is adjacent to the down-
stream end of the horizontal branch.
A) Side B) Loop C) Relief D) Circuit - Answer-loop
MATCH:
Elevated pressure
ICC COMMERCIAL PLUMBING INSPECTOR EXAM
2025/ 2026 ACTUAL EXAM CURRENTLY TESTING
COMPLETE 450 EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS WITH RATIONALES /ALREADY
GRADED A+||LATEST VERIFIED EXAM!!!||
A journeyman plumber and an apprentice, who are
employed by a master plumber, are installing the DWV-
system and water distribution system in a 2-½ story single
family dwelling. QUESTION: What answer below shall be
considered most correct to complete the following
"Plumbing code knowledge" related statement: A trap that
serves a single shower stall that is equipped with a hand
shower, a rain head, and a standard shower head shall be
no less than ________ in minimum diameter
A) 1-½" B) 2" C) 2-½" D) 3" - Answer-2 inches
A journeyman plumber and apprentice are installing 3-inch
floor drains in an open-parking-garage that is subject to
freezing temperatures. QUESTION: What answer below
shall be considered most correct to complete the following
"Plumbing code knowledge" related statement: The
installation of traps at the floor drain locations which are
,2|Page
found susceptible to freezing temperatures may be
__________.
A)Increased to 4-inch B) Eliminated C) Wrapped with
freeze protection cable D) Insulated - Answer-eliminated
A journeyman plumber and apprentice are installing lab
sinks with faucets that are connected to an acid waste
system for-(special hazardous waste) in a medical lab.
What answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: Vacuum breakers shall be installed with the
critical level at least _____-inches above the flood level
rim of the fixture they serve and on the discharge side of
the last control valve to the fixture.
A) 12 B) 6 C) 18 D) 3 - Answer-6 inches
What answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: No plumbing permit shall be issued for cross
connection installations that require ______________ until
the application for a permit is accompanied by a letter of
,3|Page
approval from the Massachusetts Department of
Environmental Protection or its designee.
A) RPBP B) A "critical level" height C) Atmospheric
vacuum breakers D) Water recycling systems - Answer-
reduced pressure backflow preventer (RPBP)
: What answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: The waste discharge from safe waste pans
serving water heaters or hot water storage tanks where
there is _______ below and shall be piped indirectly to a
properly trapped and vented fixture.
A) People B) Occupancy C) Floors D) Plumbing
connections - Answer-occupancy
GIVEN: A journeyman plumber and an apprentice, (who
are employed by a master plumber), are installing the
sanitary DWV and water distribution system in a five-story
residential condominium complex. QUESTION: What
answer below shall be considered most correct to
complete the following "Plumbing code knowledge" related
statement: CPVC-(Chlorinated Polyvinyl Chloride) pipe
, 4|Page
and fittings may be used provided that none of this
material is located within ____-inches of any connection to
a hot water tank as defined in MGL. c. 142, § 17
A) 12 B) 18 C) 20 D) 24 E) 30 - Answer-24 inches
: A journeyman plumber and apprentice are roughing-in
multiple fixtures in a new fitness center. The facility will
include a juice bar, temporary daycare room, men's and
women's toilet facilities and men's and women's locker
rooms. QUESTION: What answer below shall be
considered most correct to complete the following
"Plumbing code knowledge" related statement: A
________-vent is a branch vent that serves two or more
floor-outlet fixtures that are battery wasted. The vent
extends from the top of the horizontal soil and/or waste
branch in front of the last fixture waste and connects to a
vent stack or stack vent that is adjacent to the down-
stream end of the horizontal branch.
A) Side B) Loop C) Relief D) Circuit - Answer-loop
MATCH:
Elevated pressure
