Massachusetts Plumbing 2026-2027
Comprehensive Frequently Tested Exam Questions
With Verified Multiple Choice and Conceptual
Actual 100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
1. 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 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
2. 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
3. MATCH:
Elevated pressure
Flow designation
Ten P.S.I.G. or less
Less than 2-P.S.I
A) 3 P.S.I.G. or ten times
B) Inlet pressure
C) E.H.D.
D) Prof. Engineer - ANSWER elevated pressure- d
flow designation-c
Ten P.S.I.G. or less-a
Less than 2-P.S.I-b
4. A journeyman plumber is installing category-I gas appliances and equipment in
the basement of a building. 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 statement: 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. - ANSWER 2,400 cu. ft. 120,000/50
5. What answer below shall be considered most correct to complete the
following "Gas code knowledge" related statement: The code would require
the gas vent penetrating the roof in-[FIGURE-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 - ANSWER 24
6. In Massachusetts copper tubing and fittings may be used for natural gas
piping
A) Provided that the tubing is type-k with flared fitting connections.
B) When approved by the authority having 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.
, - ANSWER D If the gas contains no more than .03 grains of hydrogen sulfide per
100 cu. ft. of gas
7. A journeyman plumber and apprentice, who are employed by a master
plumber, are installing a natural 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 - ANSWER 36 feet
8. A journeyman plumber is installing a natural gas fired category-1 boiler with
an indirect water heater. Type-B double wall vent connector material is being
used to vent products of combustion from the boiler to an interior tile lined
masonry chimney that is 35-feet in height. QUESTION: What answer below
shall be considered most correct to complete the following "Gas code
knowledge" related statement: A clearance of _____ from combustibles shall
be maintained when using/installing type-B vent materials.
A) 6-inches
B) 2"
C) 1-foot
D) One-inch - ANSWER one inch
Comprehensive Frequently Tested Exam Questions
With Verified Multiple Choice and Conceptual
Actual 100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
1. 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 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
2. 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
3. MATCH:
Elevated pressure
Flow designation
Ten P.S.I.G. or less
Less than 2-P.S.I
A) 3 P.S.I.G. or ten times
B) Inlet pressure
C) E.H.D.
D) Prof. Engineer - ANSWER elevated pressure- d
flow designation-c
Ten P.S.I.G. or less-a
Less than 2-P.S.I-b
4. A journeyman plumber is installing category-I gas appliances and equipment in
the basement of a building. 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 statement: 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. - ANSWER 2,400 cu. ft. 120,000/50
5. What answer below shall be considered most correct to complete the
following "Gas code knowledge" related statement: The code would require
the gas vent penetrating the roof in-[FIGURE-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 - ANSWER 24
6. In Massachusetts copper tubing and fittings may be used for natural gas
piping
A) Provided that the tubing is type-k with flared fitting connections.
B) When approved by the authority having 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.
, - ANSWER D If the gas contains no more than .03 grains of hydrogen sulfide per
100 cu. ft. of gas
7. A journeyman plumber and apprentice, who are employed by a master
plumber, are installing a natural 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 - ANSWER 36 feet
8. A journeyman plumber is installing a natural gas fired category-1 boiler with
an indirect water heater. Type-B double wall vent connector material is being
used to vent products of combustion from the boiler to an interior tile lined
masonry chimney that is 35-feet in height. QUESTION: What answer below
shall be considered most correct to complete the following "Gas code
knowledge" related statement: A clearance of _____ from combustibles shall
be maintained when using/installing type-B vent materials.
A) 6-inches
B) 2"
C) 1-foot
D) One-inch - ANSWER one inch
