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CNMI Plumbing Contractor Licensing – Residential
Exam Practice Questions And Correct
Answers||Verified Exam!!!|| (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
: 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
A)1 Fixture unit
B)D 2' X L' X _____= Capacity
C)Diameter ÷ 2
D) .00433A)7.5 GALLONS
A)7.5 GALLONS
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B)5.875
C)RADIUS OF A CIRCLE
D)1 CU IN OF WATER - Answer-A)7.5 GALLONS
B)5.875
C)RADIUS OF A CIRCLE
D)1 CU IN OF WATER
) GIVEN: A journeyman plumber and apprentice, who are
employed by a master plumber, are installing sanitary
drainage, waste and vents for a beauty salon. The facility
is in a rural Town without municipal sewage connections. A
portion of the waste being generated by shampoo sinks in
the beauty salon is being run to a holding tank in
compliance with the code. The inside dimensions of the
holding tank are 12' X 10'-6" X 8'. QUESTION: What
answer below shall be considered most correct to
complete the following "Plumbing and gas-fitting math"
related statement: Assume that the holding tank described
above is ⅞-full. ____-gallons of water would be in the
tank.
A) 7,558-7,562 B) 6,613-6,617 C) 1,006-1,010 D) 132-136
- Answer-6,613-6,617 L x W x H X 7.5 = capacity and
wants 87.5 of it
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A one-inch diameter copper water service is entering an
existing building and connects to a water meter. A water
pressure gauge that displays a P.S.I. of-[68], is installed on
the piping at the downstream location of the water meter.
QUESTION: What answer below shall be considered most
nearly correct to complete the following "Plumbing and
gasfitting math" related statement: A gauge placed at or
near to a hose connection located on a floor level that is
28-feet below this point would most likely indicate a p.s.i.g.
of __________.
A) 11 to 12-p.s.i.g. B) 59 to 60-p.s.i.g. C) 60 to 61-p.s.i.g.
D) 80 to 81-p.s.i.g. - Answer-80 to 81-p.s.i.g. H x .434
for an offset what is the slanted portion of the pipe called
A) Offset B) Diagonal C) Rise D) Run - Answer-run
for an offset what is the height of the slanted potion called
A) Run B) Diagonal C) Rise D) Hypotenuse - Answer-rise
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A journeyman plumber and apprentice, who are employed
by a master plumber, have reached a point in a piping
installation that will require them to offset around an
obstruction. The offset will be made using 45-degree
fittings. Assume that the offset/rise at point-[D] in FIGURE-
[TP9-Q1-1B: PIPING OFFSET KNOWLEDGE] is 46".
QUESTION: What answer below shall be considered most
nearly correct to complete the following "Plumbing and
gasfitting math" related statement: Assume that the fitting
make-in for each 45-degree elbow is known to be one-
inch, the pipe length that is to be cut for the travel pipe [A]
is ______
A) 5'-4-⅞" B) 6'-6" C) 5'-2-⅞" D) 6'-4" - Answer-5ft 2 inches
7/8 46 x 1.41 = 64.86
A)Circumference X .3183
B)1 pound
C) Expansion of water to ice
D)1-gallon of water
A)DIAMETER
B)16 OUNCES
C)8%
CNMI Plumbing Contractor Licensing – Residential
Exam Practice Questions And Correct
Answers||Verified Exam!!!|| (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
: 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
A)1 Fixture unit
B)D 2' X L' X _____= Capacity
C)Diameter ÷ 2
D) .00433A)7.5 GALLONS
A)7.5 GALLONS
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B)5.875
C)RADIUS OF A CIRCLE
D)1 CU IN OF WATER - Answer-A)7.5 GALLONS
B)5.875
C)RADIUS OF A CIRCLE
D)1 CU IN OF WATER
) GIVEN: A journeyman plumber and apprentice, who are
employed by a master plumber, are installing sanitary
drainage, waste and vents for a beauty salon. The facility
is in a rural Town without municipal sewage connections. A
portion of the waste being generated by shampoo sinks in
the beauty salon is being run to a holding tank in
compliance with the code. The inside dimensions of the
holding tank are 12' X 10'-6" X 8'. QUESTION: What
answer below shall be considered most correct to
complete the following "Plumbing and gas-fitting math"
related statement: Assume that the holding tank described
above is ⅞-full. ____-gallons of water would be in the
tank.
A) 7,558-7,562 B) 6,613-6,617 C) 1,006-1,010 D) 132-136
- Answer-6,613-6,617 L x W x H X 7.5 = capacity and
wants 87.5 of it
,3|Page
A one-inch diameter copper water service is entering an
existing building and connects to a water meter. A water
pressure gauge that displays a P.S.I. of-[68], is installed on
the piping at the downstream location of the water meter.
QUESTION: What answer below shall be considered most
nearly correct to complete the following "Plumbing and
gasfitting math" related statement: A gauge placed at or
near to a hose connection located on a floor level that is
28-feet below this point would most likely indicate a p.s.i.g.
of __________.
A) 11 to 12-p.s.i.g. B) 59 to 60-p.s.i.g. C) 60 to 61-p.s.i.g.
D) 80 to 81-p.s.i.g. - Answer-80 to 81-p.s.i.g. H x .434
for an offset what is the slanted portion of the pipe called
A) Offset B) Diagonal C) Rise D) Run - Answer-run
for an offset what is the height of the slanted potion called
A) Run B) Diagonal C) Rise D) Hypotenuse - Answer-rise
, 4|Page
A journeyman plumber and apprentice, who are employed
by a master plumber, have reached a point in a piping
installation that will require them to offset around an
obstruction. The offset will be made using 45-degree
fittings. Assume that the offset/rise at point-[D] in FIGURE-
[TP9-Q1-1B: PIPING OFFSET KNOWLEDGE] is 46".
QUESTION: What answer below shall be considered most
nearly correct to complete the following "Plumbing and
gasfitting math" related statement: Assume that the fitting
make-in for each 45-degree elbow is known to be one-
inch, the pipe length that is to be cut for the travel pipe [A]
is ______
A) 5'-4-⅞" B) 6'-6" C) 5'-2-⅞" D) 6'-4" - Answer-5ft 2 inches
7/8 46 x 1.41 = 64.86
A)Circumference X .3183
B)1 pound
C) Expansion of water to ice
D)1-gallon of water
A)DIAMETER
B)16 OUNCES
C)8%
