PLUMBING LEVEL 3 EXAM 2024-2025 ACTUAL EXAM 60 QUESTIONS A
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
1. A journeyman plumber and an apprentice, who are 2 inches
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"
2. A journeyman plumber and apprentice are installing eliminated
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 found susceptible to freez-
ing temperatures may be __________.
A)Increased to 4-inch B) Eliminated C) Wrapped with
freeze protection cable D) Insulated
3. A journeyman plumber and apprentice are installing 6 inches
lab sinks with faucets that are connected to an acid
waste system for-(special hazardous waste) in a med-
ical lab. What answer below shall be considered
most correct to complete the following "Plumbing
code knowledge" related statement: Vacuum break-
ers 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 con-
trol valve to the fixture.
A) 12 B) 6 C) 18 D) 3
4.
, PLUMBING LEVEL 3 EXAM 2024-2025 ACTUAL EXAM 60 QUESTIONS A
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
What answer below shall be considered most cor- reduced pressure
rect to complete the following "Plumbing code knowl- backflow preven-
edge" related statement: No plumbing permit shall be ter (RPBP)
issued for cross connection installations that require
______________ until the application for a permit is
accompanied by a letter of approval from the Massa-
chusetts Department of Environmental Protection or
its designee.
A) RPBP B) A "critical level" height C) Atmospheric
vacuum breakers D) Water recycling systems
5. : What answer below shall be considered most cor- occupancy
rect to complete the following "Plumbing code knowl-
edge" 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 con-
nections
6. GIVEN: A journeyman plumber and an apprentice, 24 inches
(who are employed by a master plumber), are in-
stalling the sanitary DWV and water distribution sys-
tem 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-(Chlori-
nated Polyvinyl Chloride) pipe 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
7. : A journeyman plumber and apprentice are rough- loop
ing-in multiple fixtures in a new fitness center. The fa-
, PLUMBING LEVEL 3 EXAM 2024-2025 ACTUAL EXAM 60 QUESTIONS A
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
cility 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 be-
low shall be considered most correct to complete the
following "Plumbing code knowledge" related state-
ment: A ________-vent is a branch vent that serves
two or more floor-outlet fixtures that are battery wast-
ed. 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
8. MATCH: elevated pres-
Elevated pressure sure- d
Flow designation flow designation-c
Ten P.S.I.G. or less Ten P.S.I.G. or
Less than 2-P.S.I less-a
A) 3 P.S.I.G. or ten times Less than
B) Inlet pressure 2-P.S.I-b
C) E.H.D.
D) Prof. Engineer
9. N: A journeyman plumber is installing category-I gas 2,400 cu. ft.
appliances and equipment in the basement of a build- 120,000/50
ing. A 120,000 BTU/hr. boiler and 40,000 BTU/hr. water
heater are being installed. QUESTION: What answer
below shall be considered most correct to complete
the following "Gas code knowledge" related state-
ment: The boiler requires a minimum of _____-cu. ft.
of air to support proper combustion
A) 2,400 cu. ft. B) 120 sq. in. C) 3,200 sq. ft. D) 800 cu.
ft.
10. ) QUESTION: What answer below shall be consid- 24
ered most correct to complete the following "Gas
, PLUMBING LEVEL 3 EXAM 2024-2025 ACTUAL EXAM 60 QUESTIONS A
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
code knowledge" related statement: The code would
require the gas vent penetrating the roof in-[FIG-
URE-TP-B-Q1-1A: GAS VENT SIZING] as identified at
point-[A] to be not less than ______ above any portion
of a building within 10-feet horizontally.
A) 24" B) 3-feet C) 30-inches D) Forty-two-inches
11. In Massachusetts copper tubing and fittings may be If the gas contains
used for natural gas piping no more than .03
grains of hydrogen
A) Provided that the tubing is type-k with flared fitting sulfide per 100 cu.
connections. B) When approved by the authority hav- ft. of gas
ing jurisdiction.
C) At interior locations only and not concealed.
D) If the gas contains no more than .03 grains of
hydrogen sulfide per 100 cu. ft. of gas.
12. : A journeyman plumber and apprentice, who are 36 feet
employed by a master plumber, are installing a nat-
ural gas fired category-1 boiler and water heater to
an interior, clay tile lined, masonry chimney. When
measured in compliance with the code the chimney
"height" is 48-feet. QUESTION: What answer below
shall be considered most correct to complete the
following "Gas code knowledge" related statement:
_____ is the maximum allowable amount of 6-inch
single wall metal vent connector material that may be
installed horizontally to connect the boiler and water
heater to the chimney
A) 36-feet B) 50% of the chimney height C) 48-feet D)
9-feet
13. : A journeyman plumber is installing a natural gas one inch
fired category-1 boiler with an indirect water heater.
Type-B double wall vent connector material is be-
ing used to vent products of combustion from the
boiler to an interior tile lined masonry chimney that
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
1. A journeyman plumber and an apprentice, who are 2 inches
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"
2. A journeyman plumber and apprentice are installing eliminated
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 found susceptible to freez-
ing temperatures may be __________.
A)Increased to 4-inch B) Eliminated C) Wrapped with
freeze protection cable D) Insulated
3. A journeyman plumber and apprentice are installing 6 inches
lab sinks with faucets that are connected to an acid
waste system for-(special hazardous waste) in a med-
ical lab. What answer below shall be considered
most correct to complete the following "Plumbing
code knowledge" related statement: Vacuum break-
ers 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 con-
trol valve to the fixture.
A) 12 B) 6 C) 18 D) 3
4.
, PLUMBING LEVEL 3 EXAM 2024-2025 ACTUAL EXAM 60 QUESTIONS A
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
What answer below shall be considered most cor- reduced pressure
rect to complete the following "Plumbing code knowl- backflow preven-
edge" related statement: No plumbing permit shall be ter (RPBP)
issued for cross connection installations that require
______________ until the application for a permit is
accompanied by a letter of approval from the Massa-
chusetts Department of Environmental Protection or
its designee.
A) RPBP B) A "critical level" height C) Atmospheric
vacuum breakers D) Water recycling systems
5. : What answer below shall be considered most cor- occupancy
rect to complete the following "Plumbing code knowl-
edge" 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 con-
nections
6. GIVEN: A journeyman plumber and an apprentice, 24 inches
(who are employed by a master plumber), are in-
stalling the sanitary DWV and water distribution sys-
tem 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-(Chlori-
nated Polyvinyl Chloride) pipe 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
7. : A journeyman plumber and apprentice are rough- loop
ing-in multiple fixtures in a new fitness center. The fa-
, PLUMBING LEVEL 3 EXAM 2024-2025 ACTUAL EXAM 60 QUESTIONS A
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
cility 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 be-
low shall be considered most correct to complete the
following "Plumbing code knowledge" related state-
ment: A ________-vent is a branch vent that serves
two or more floor-outlet fixtures that are battery wast-
ed. 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
8. MATCH: elevated pres-
Elevated pressure sure- d
Flow designation flow designation-c
Ten P.S.I.G. or less Ten P.S.I.G. or
Less than 2-P.S.I less-a
A) 3 P.S.I.G. or ten times Less than
B) Inlet pressure 2-P.S.I-b
C) E.H.D.
D) Prof. Engineer
9. N: A journeyman plumber is installing category-I gas 2,400 cu. ft.
appliances and equipment in the basement of a build- 120,000/50
ing. A 120,000 BTU/hr. boiler and 40,000 BTU/hr. water
heater are being installed. QUESTION: What answer
below shall be considered most correct to complete
the following "Gas code knowledge" related state-
ment: The boiler requires a minimum of _____-cu. ft.
of air to support proper combustion
A) 2,400 cu. ft. B) 120 sq. in. C) 3,200 sq. ft. D) 800 cu.
ft.
10. ) QUESTION: What answer below shall be consid- 24
ered most correct to complete the following "Gas
, PLUMBING LEVEL 3 EXAM 2024-2025 ACTUAL EXAM 60 QUESTIONS A
CORRECT DETAILED ANSWERS |ALREADY GRADED A
Study online at https://quizlet.com/_g5kmnf
code knowledge" related statement: The code would
require the gas vent penetrating the roof in-[FIG-
URE-TP-B-Q1-1A: GAS VENT SIZING] as identified at
point-[A] to be not less than ______ above any portion
of a building within 10-feet horizontally.
A) 24" B) 3-feet C) 30-inches D) Forty-two-inches
11. In Massachusetts copper tubing and fittings may be If the gas contains
used for natural gas piping no more than .03
grains of hydrogen
A) Provided that the tubing is type-k with flared fitting sulfide per 100 cu.
connections. B) When approved by the authority hav- ft. of gas
ing jurisdiction.
C) At interior locations only and not concealed.
D) If the gas contains no more than .03 grains of
hydrogen sulfide per 100 cu. ft. of gas.
12. : A journeyman plumber and apprentice, who are 36 feet
employed by a master plumber, are installing a nat-
ural gas fired category-1 boiler and water heater to
an interior, clay tile lined, masonry chimney. When
measured in compliance with the code the chimney
"height" is 48-feet. QUESTION: What answer below
shall be considered most correct to complete the
following "Gas code knowledge" related statement:
_____ is the maximum allowable amount of 6-inch
single wall metal vent connector material that may be
installed horizontally to connect the boiler and water
heater to the chimney
A) 36-feet B) 50% of the chimney height C) 48-feet D)
9-feet
13. : A journeyman plumber is installing a natural gas one inch
fired category-1 boiler with an indirect water heater.
Type-B double wall vent connector material is be-
ing used to vent products of combustion from the
boiler to an interior tile lined masonry chimney that
