Massachusetts Plumbers Journeyman
Exam Questions and Answers Graded A+
___________________are required on the hot and cold water inlets to the automatic
central control mixing valve - ANSWER-Check Valves
. All sillcocks, hose bibbs and wall hydrants shall be separately controlled by a -
ANSWER-by a shutoff valve inside the building
1. Any structure, in which a building drain is installed, shall have as a minimum one full
size main stack vent or a vent stack no less than - ANSWER-three inches in diameter
2. Small Pipe - 12 Inch Clearance. Cleanouts smaller than three inches shall be so
installed that there is a - ANSWER-12-inch clearance for the purpose of clearing
stoppages.
3. Where only two fixtures that are battery waste and vented are installed on the same
branch, a relief vent as described above shall - ANSWER-not be required
A _________ shall be located on rigid piping up stream of a flexible connector. -
ANSWER-Accessible Gas Shut-Off
A backflow preventer or vacuum breaker shall be installed on all sillcocks, hose
connections and wall hydrants including faucets that incorporate
a_________________? - ANSWER-a hose thread outlet
A Brass closet flange shall have a minimum thickness of - ANSWER-1/8"
A combination plumbing fixture may be installed on one trap - ANSWER--one
compartment is not more than six inches deeper than the other
-the waste outlets are not more than 30 inches apart.
A combination waste and vent system shall not be used unless - ANSWER-no other
system is possible or practicable, and only then after Special-permission is granted by
the Board
A combination waste-and-vent system is limited to the installation of - ANSWER-floor
drains and sinks
A dead end may be used to? - ANSWER-Extend the cleanout.
A kitchen sink shall not waste into any horizontal drain line that receives the waste from
a - ANSWER-bathtub or similar flat bottom fixture that is smaller than three inches in
diameter
,A manometer used to measure gas shall be calibrated in ___________. - ANSWER-
Inches of water column
A permit from the _________ & ________ shall be obtained for the installation of an
unvented gas fired space room heater. - ANSWER-Fire Dept. & Gas Inspector
A safe waste pan shall be installed under a water heater or hot water storage tank that
is installed in a position - ANSWER-in a position elevated above any occupied space
A sleeve for CSST tubing shall be schedule _______ black or galvanized pipe. -
ANSWER-40
A sleeve for CSST tubing shall extend a minimum of ________ in. from the top of a
finished floor or deck. - ANSWER-6
A suds relief vent shall connect to the laundry main drain a minimum of - ANSWER-40
pipe diameters downstream from the base of the laundry stack.
A waste and vent that serves a kitchen sink, a garbage disposal, a dish washer, or other
fixture installed for culinary use, or one that receives the discharge from a clothes
washing machine may not serve as a - ANSWER-wet vent for any other fixture.
a. All two-piece toilets shall be low consumption toilets, which use a maximum of -
ANSWER-1.6 gallons per flush
Air Gap (Drainage System). - ANSWER-The unobstructed vertical distance through the
free atmosphere between the outlet of a waste pipe and the flood level rim of the
receptacle into which the waste discharges.
Air
All area drains shall be connected to the - ANSWER-storm water drainage system
All establishments summarized in 248 CMR 10.09(2)(a), (restaurants, cafeterias,
hotels...) that are served by a municipal sanitary sewer and can seat 20 patrons or more
shall incorporate - ANSWER-food waste grinders
All floor drains and trough drains shall be installed with a, readily accessible -
ANSWER-automatic trap-priming device
All food-waste grinder units shall be provided with an - ANSWER-adequate supply of
cold water from faucets at sufficient flow rate to insure proper functioning of the unit.
All hospitals shall have - ANSWER-dual services installed in a manner to provide an
uninterrupted supply of water in case of a water main break.
, All indirect waste piping shall discharge into the building sanitary or storm drainage
system through - ANSWER-an air gap or air break
All strainer plates on drain inlets shall be designed and installed so that the diameter of
the opening is no greater than...? - ANSWER-1/2"
All sumps and ejectors shall be protected against backflow and backpressure from the
building sewer or building drain by installing - ANSWER-a backwater or check valve in
the discharge pipe from the ejector or sump pump
Allowable Materials. (a) When installing fittings or piping for renovations or alterations
within an existing soil stack, waste stack, vent stack or drain, the fitting or piping shall be
of the - ANSWER-same material as the existing stack or drain and be compliant with a
joining method outlined in 248 CMR 10.07
An indirect waste stack receiving the discharge from fixtures on - ANSWER-two or more
floors shall be extended to the outer air as required for a stack vent
Any fixture or piece of equipment to be indirectly wasted that has a waste outlet smaller
than 1¼ inches in diameter shall be connected to an indirect waste pipe - ANSWER-one
size larger than said outlet.
Approved shall mean __________________. - ANSWER-Accepted by the authority
having jurisdiction
As in the use of color bands, tags shall be attached to pipes at intervals of not more
than - ANSWER-25 feet and at either side of points where pipes pass through walls and
above and below points where pipes pass through floors or roofs
Automatic vent fittings are not permitted, except with - ANSWER-Special-permission
from the Board.
Automatic Vent Fittings. 1. The automatic vent fitting shall be installed in the vertical
position not less than - ANSWER-six inches above the crown of the trap it serves.
Backfilling. 1. Until the crown of the pipe is covered by at - ANSWER-at least two feet of
tamped earth considerable care shall be exercised in backfilling trenches
Backfilling. 1. Until the crown of the pipe is covered by at lest____________ feet of
tamped earth considerable care shall be exercised in backfilling trenches - ANSWER-
two feet
Barometric Loop. - ANSWER-A vertical loop of pipe, rising to a height sufficient to
prevent back-siphonage from occurring in the potable water supply pipe. (Approximately
35 feet, depending on the weight of the atmosphere.)
Exam Questions and Answers Graded A+
___________________are required on the hot and cold water inlets to the automatic
central control mixing valve - ANSWER-Check Valves
. All sillcocks, hose bibbs and wall hydrants shall be separately controlled by a -
ANSWER-by a shutoff valve inside the building
1. Any structure, in which a building drain is installed, shall have as a minimum one full
size main stack vent or a vent stack no less than - ANSWER-three inches in diameter
2. Small Pipe - 12 Inch Clearance. Cleanouts smaller than three inches shall be so
installed that there is a - ANSWER-12-inch clearance for the purpose of clearing
stoppages.
3. Where only two fixtures that are battery waste and vented are installed on the same
branch, a relief vent as described above shall - ANSWER-not be required
A _________ shall be located on rigid piping up stream of a flexible connector. -
ANSWER-Accessible Gas Shut-Off
A backflow preventer or vacuum breaker shall be installed on all sillcocks, hose
connections and wall hydrants including faucets that incorporate
a_________________? - ANSWER-a hose thread outlet
A Brass closet flange shall have a minimum thickness of - ANSWER-1/8"
A combination plumbing fixture may be installed on one trap - ANSWER--one
compartment is not more than six inches deeper than the other
-the waste outlets are not more than 30 inches apart.
A combination waste and vent system shall not be used unless - ANSWER-no other
system is possible or practicable, and only then after Special-permission is granted by
the Board
A combination waste-and-vent system is limited to the installation of - ANSWER-floor
drains and sinks
A dead end may be used to? - ANSWER-Extend the cleanout.
A kitchen sink shall not waste into any horizontal drain line that receives the waste from
a - ANSWER-bathtub or similar flat bottom fixture that is smaller than three inches in
diameter
,A manometer used to measure gas shall be calibrated in ___________. - ANSWER-
Inches of water column
A permit from the _________ & ________ shall be obtained for the installation of an
unvented gas fired space room heater. - ANSWER-Fire Dept. & Gas Inspector
A safe waste pan shall be installed under a water heater or hot water storage tank that
is installed in a position - ANSWER-in a position elevated above any occupied space
A sleeve for CSST tubing shall be schedule _______ black or galvanized pipe. -
ANSWER-40
A sleeve for CSST tubing shall extend a minimum of ________ in. from the top of a
finished floor or deck. - ANSWER-6
A suds relief vent shall connect to the laundry main drain a minimum of - ANSWER-40
pipe diameters downstream from the base of the laundry stack.
A waste and vent that serves a kitchen sink, a garbage disposal, a dish washer, or other
fixture installed for culinary use, or one that receives the discharge from a clothes
washing machine may not serve as a - ANSWER-wet vent for any other fixture.
a. All two-piece toilets shall be low consumption toilets, which use a maximum of -
ANSWER-1.6 gallons per flush
Air Gap (Drainage System). - ANSWER-The unobstructed vertical distance through the
free atmosphere between the outlet of a waste pipe and the flood level rim of the
receptacle into which the waste discharges.
Air
All area drains shall be connected to the - ANSWER-storm water drainage system
All establishments summarized in 248 CMR 10.09(2)(a), (restaurants, cafeterias,
hotels...) that are served by a municipal sanitary sewer and can seat 20 patrons or more
shall incorporate - ANSWER-food waste grinders
All floor drains and trough drains shall be installed with a, readily accessible -
ANSWER-automatic trap-priming device
All food-waste grinder units shall be provided with an - ANSWER-adequate supply of
cold water from faucets at sufficient flow rate to insure proper functioning of the unit.
All hospitals shall have - ANSWER-dual services installed in a manner to provide an
uninterrupted supply of water in case of a water main break.
, All indirect waste piping shall discharge into the building sanitary or storm drainage
system through - ANSWER-an air gap or air break
All strainer plates on drain inlets shall be designed and installed so that the diameter of
the opening is no greater than...? - ANSWER-1/2"
All sumps and ejectors shall be protected against backflow and backpressure from the
building sewer or building drain by installing - ANSWER-a backwater or check valve in
the discharge pipe from the ejector or sump pump
Allowable Materials. (a) When installing fittings or piping for renovations or alterations
within an existing soil stack, waste stack, vent stack or drain, the fitting or piping shall be
of the - ANSWER-same material as the existing stack or drain and be compliant with a
joining method outlined in 248 CMR 10.07
An indirect waste stack receiving the discharge from fixtures on - ANSWER-two or more
floors shall be extended to the outer air as required for a stack vent
Any fixture or piece of equipment to be indirectly wasted that has a waste outlet smaller
than 1¼ inches in diameter shall be connected to an indirect waste pipe - ANSWER-one
size larger than said outlet.
Approved shall mean __________________. - ANSWER-Accepted by the authority
having jurisdiction
As in the use of color bands, tags shall be attached to pipes at intervals of not more
than - ANSWER-25 feet and at either side of points where pipes pass through walls and
above and below points where pipes pass through floors or roofs
Automatic vent fittings are not permitted, except with - ANSWER-Special-permission
from the Board.
Automatic Vent Fittings. 1. The automatic vent fitting shall be installed in the vertical
position not less than - ANSWER-six inches above the crown of the trap it serves.
Backfilling. 1. Until the crown of the pipe is covered by at - ANSWER-at least two feet of
tamped earth considerable care shall be exercised in backfilling trenches
Backfilling. 1. Until the crown of the pipe is covered by at lest____________ feet of
tamped earth considerable care shall be exercised in backfilling trenches - ANSWER-
two feet
Barometric Loop. - ANSWER-A vertical loop of pipe, rising to a height sufficient to
prevent back-siphonage from occurring in the potable water supply pipe. (Approximately
35 feet, depending on the weight of the atmosphere.)
