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Plumbing Exam Correct Answers Latest Version 2024/2025
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Plumbing Exam Correct Answers Latest Version 2024/2025
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Plumbing Exam Correct Answers LatestVersion 2024/2025
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 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 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 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
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
N: 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
) QUESTION: 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
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: If
the gas contains no more than .03 grains of hydrogen sulfide per 100 cu. ft. of gas
: 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
: 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
B)5.875
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