Key Quizzes & Correct Answers (New
Quiz_________________?
_____-vent is known as a single stack sanitary drainage system employing the use of aerator
and de-aerator fittings to regulate pressure changes within the DWV-system to protect trap
seals.
A) So B) Continuous C) Yoke D) Loop -
Answer✅
so
Quiz_________________?
: A clean-out that is no less than _________ is required at the base of a 6-inch soil stack.
A) 2" B) Six-inch C) One pipe diameter smaller D) 4-inch -
Answer✅
4-inch
Quiz_________________?
: A gas boiler is operating inside a residential home. A journeyman plumber is observing and
timing the rotation of the 1-cubic foot dial on a natural gas meter located at the exterior of
the structure. The dial completes a full revolution in 27-seconds. NOTE: One cubic foot of
gas is equal to 1000 BTU/hr. QUESTION: What answer below shall be considered most
correct to complete the following "Gas code knowledge" related statement: The boiler is
consuming approximately, __________ BTU's per hour.
1
,A) 120,000 B) 136,000 C) 141,000 D) 68,000 -
Answer✅
136,000
Quiz_________________?
: A journeyman and apprentice plumber are completing the installation of a vacuum
powered sanitary drainage systems. The system is in a supermarket serving drainage
connections for vegetable and produce display coolers. They are pre-testing the piping
system before notifying the local plumbing inspector for a formal inspection. QUESTION:
What answer below shall be considered most correct to complete the following "Plumbing
code knowledge" related statement: Prior to installation of any special fixtures or gravity to
vacuum interface devices, the entire vacuum drainage piping system shall be pressurized to
not less than _____-p.s.i.g and shall show no loss in gauge pressure for at least ten minutes.
A) 5 B) 10 C) 15 D) 125 -
Answer✅
15
Quiz_________________?
: A journeyman and apprentice plumber are completing the underground installation of a
non-metallic-(plastic) pipe supply from the single-family dwelling to an exterior gas grill 58-
feet from the building. QUESTION: What answer below shall be considered most correct
to complete the following "Gas code knowledge" related statement: ______ end of the
tracer wire or tape shall be brought aboveground at a building wall or riser.
A) Each B) One C) Both D) Fourteen -
Answer✅
one
Quiz_________________?
2
,: A journeyman and apprentice plumber-(who are employed by a master plumber) are
installing ½", ¾", 1", 1-¼", 1- ½' and 2-inch schedule-40 black steel gas piping for a natural
gas system in a home improvement retail warehouse. QUESTION: What answer below shall
be considered most correct to complete the following "Gas code knowledge" related
statement: 175-feet of 1-inch schedule 40 steel gas piping shall be pitched at no less than
_______ to prevent traps.
A) ⅛" per foot B) No pitch is necessary C) ¼" per foot D) ⅛" per 20' E) ¼" per 15' -
Answer✅
¼" per 15'
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are commencing with the installation of
natural gas fired equipment outfitted with a burner and a combustion chamber that requires
an input of 750,000 BTU/hr. for heating. QUESTION: What answer below shall be
considered most correct to complete the following "Gas code knowledge" related
statement: All installations of fuel gas utilization equipment not governed by NFPA 85 or 86
(as amended) having inputs over _____________ per combustion chamber shall be
governed by 248 CMR 7.00: Large Gas Utilization Equipment.
A) 5,000,000 BTU/hr. B) 400,000 BTU/hr. C) 12,500,000 BTU/hr. D) 1,000,000 BTU/hr -
Answer✅
400,000 BTU/hr.
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are completing the installation of CSST.
The tubing shall be sleeved when passing through a metal or concrete deck to protect the
integrity of the material. QUESTION: What answer below shall be considered most correct
to complete the following "Gas code knowledge" related statement: The sleeve used shall be
Schedule 40 black or galvanized steel pipe and shall extend a minimum of _____- inches
from the top of the finished floor and the underside of the deck.
A) Two B) 6 C) Twelve D) 18 -
Answer✅
3
, 6
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are completing the installation of exposed
copper tubing as a propane gas supply for a gas range and water heater in a single-family
dwelling. QUESTION: What answer below shall be considered most correct to complete
the following "Gas code knowledge" related statement: _______ is the "propane" gas code
adopted by the Commonwealth of Massachusetts w/amendments.
A) NFPA-54 B) 248 CMR C) NFPA-58 D) MGL c. 142 -
Answer✅
NFPA-58
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are completing the installation of natural
gas fired equipment that is connected to a low-pressure gas service supply main and gas
booster. The gas service supply will provide gas at-[7" water column]. The gas equipment
being installed requires a constant uniform pressure of-[9'' water column]. QUESTION:
What answer below shall be considered most correct to complete the following "Gas code
knowledge" related statement: If not part of the booster, the equipment served by the
booster shall be equipped with a manual reset ________ gas pressure switch and a check
valve upstream of the booster
A) High B) Interlocking C) Safety shut-off D) Low -
Answer✅
Low
Quiz_________________?
: A journeyman plumber and an apprentice, who are employed by a master plumber, are
pre-testing the water distribution and DWV-system of a building in preparation for a formal
inspection by the local plumbing and gas-fitting inspector. QUESTION: What answer below
shall be considered most correct to complete the following "Plumbing code knowledge"
related statement: When testing the rough plumbing connections of the drainage, waste and
vent system of a building with smoke _________
4
Quiz_________________?
_____-vent is known as a single stack sanitary drainage system employing the use of aerator
and de-aerator fittings to regulate pressure changes within the DWV-system to protect trap
seals.
A) So B) Continuous C) Yoke D) Loop -
Answer✅
so
Quiz_________________?
: A clean-out that is no less than _________ is required at the base of a 6-inch soil stack.
A) 2" B) Six-inch C) One pipe diameter smaller D) 4-inch -
Answer✅
4-inch
Quiz_________________?
: A gas boiler is operating inside a residential home. A journeyman plumber is observing and
timing the rotation of the 1-cubic foot dial on a natural gas meter located at the exterior of
the structure. The dial completes a full revolution in 27-seconds. NOTE: One cubic foot of
gas is equal to 1000 BTU/hr. QUESTION: What answer below shall be considered most
correct to complete the following "Gas code knowledge" related statement: The boiler is
consuming approximately, __________ BTU's per hour.
1
,A) 120,000 B) 136,000 C) 141,000 D) 68,000 -
Answer✅
136,000
Quiz_________________?
: A journeyman and apprentice plumber are completing the installation of a vacuum
powered sanitary drainage systems. The system is in a supermarket serving drainage
connections for vegetable and produce display coolers. They are pre-testing the piping
system before notifying the local plumbing inspector for a formal inspection. QUESTION:
What answer below shall be considered most correct to complete the following "Plumbing
code knowledge" related statement: Prior to installation of any special fixtures or gravity to
vacuum interface devices, the entire vacuum drainage piping system shall be pressurized to
not less than _____-p.s.i.g and shall show no loss in gauge pressure for at least ten minutes.
A) 5 B) 10 C) 15 D) 125 -
Answer✅
15
Quiz_________________?
: A journeyman and apprentice plumber are completing the underground installation of a
non-metallic-(plastic) pipe supply from the single-family dwelling to an exterior gas grill 58-
feet from the building. QUESTION: What answer below shall be considered most correct
to complete the following "Gas code knowledge" related statement: ______ end of the
tracer wire or tape shall be brought aboveground at a building wall or riser.
A) Each B) One C) Both D) Fourteen -
Answer✅
one
Quiz_________________?
2
,: A journeyman and apprentice plumber-(who are employed by a master plumber) are
installing ½", ¾", 1", 1-¼", 1- ½' and 2-inch schedule-40 black steel gas piping for a natural
gas system in a home improvement retail warehouse. QUESTION: What answer below shall
be considered most correct to complete the following "Gas code knowledge" related
statement: 175-feet of 1-inch schedule 40 steel gas piping shall be pitched at no less than
_______ to prevent traps.
A) ⅛" per foot B) No pitch is necessary C) ¼" per foot D) ⅛" per 20' E) ¼" per 15' -
Answer✅
¼" per 15'
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are commencing with the installation of
natural gas fired equipment outfitted with a burner and a combustion chamber that requires
an input of 750,000 BTU/hr. for heating. QUESTION: What answer below shall be
considered most correct to complete the following "Gas code knowledge" related
statement: All installations of fuel gas utilization equipment not governed by NFPA 85 or 86
(as amended) having inputs over _____________ per combustion chamber shall be
governed by 248 CMR 7.00: Large Gas Utilization Equipment.
A) 5,000,000 BTU/hr. B) 400,000 BTU/hr. C) 12,500,000 BTU/hr. D) 1,000,000 BTU/hr -
Answer✅
400,000 BTU/hr.
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are completing the installation of CSST.
The tubing shall be sleeved when passing through a metal or concrete deck to protect the
integrity of the material. QUESTION: What answer below shall be considered most correct
to complete the following "Gas code knowledge" related statement: The sleeve used shall be
Schedule 40 black or galvanized steel pipe and shall extend a minimum of _____- inches
from the top of the finished floor and the underside of the deck.
A) Two B) 6 C) Twelve D) 18 -
Answer✅
3
, 6
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are completing the installation of exposed
copper tubing as a propane gas supply for a gas range and water heater in a single-family
dwelling. QUESTION: What answer below shall be considered most correct to complete
the following "Gas code knowledge" related statement: _______ is the "propane" gas code
adopted by the Commonwealth of Massachusetts w/amendments.
A) NFPA-54 B) 248 CMR C) NFPA-58 D) MGL c. 142 -
Answer✅
NFPA-58
Quiz_________________?
: A journeyman and apprentice plumber/gasfitter are completing the installation of natural
gas fired equipment that is connected to a low-pressure gas service supply main and gas
booster. The gas service supply will provide gas at-[7" water column]. The gas equipment
being installed requires a constant uniform pressure of-[9'' water column]. QUESTION:
What answer below shall be considered most correct to complete the following "Gas code
knowledge" related statement: If not part of the booster, the equipment served by the
booster shall be equipped with a manual reset ________ gas pressure switch and a check
valve upstream of the booster
A) High B) Interlocking C) Safety shut-off D) Low -
Answer✅
Low
Quiz_________________?
: A journeyman plumber and an apprentice, who are employed by a master plumber, are
pre-testing the water distribution and DWV-system of a building in preparation for a formal
inspection by the local plumbing and gas-fitting inspector. QUESTION: What answer below
shall be considered most correct to complete the following "Plumbing code knowledge"
related statement: When testing the rough plumbing connections of the drainage, waste and
vent system of a building with smoke _________
4
