TFM10 NFPA 24 LATEST 2026 TEST PAPER QUESTIONS
AND SOLUTIONS RATED A+
✔✔insulated against the passage of an electric current - ✔✔Where it is necessary to
join metal pipe with pipe of dissimilar metal, the joint shall be
_______________________________ using an approved method.
✔✔Top of the piping to the final grade - ✔✔The depth of piping shall be measured from
the _______________
✔✔NFPA 13 - ✔✔Where private fire service mains are installed aboveground, they shall
be protected from freezing in accordance with _______________________
✔✔the same distance - ✔✔Where piping is installed adjacent to a vertical face, it shall
be installed from the vertical face at ___________________________ as if the piping
were buried
✔✔10 ft - ✔✔Private fire service mains supplying fire protection systems within the
building shall be permitted to extend horizontally no more than _________________
cumulatively, as measured from the outside of the building, under the building to the
riser location.
✔✔12 inches - ✔✔Piping shall be installed a minimum of _______________ below the
bottom of building foundations or footers EXCEPT for when the piping is sleeved with
an approved material.
✔✔10 ft - ✔✔Private fire service mains shall not be permitted to extend more
than_________________ under the building EXCEPT for when they are run in a
covered trench.
✔✔valve - ✔✔Where piping is installed in a trench as permitted by 10.4.3.2.1, a
_______________ shall be provided where the underground piping enters the trench.
✔✔Thrust Blocks - ✔✔_________________________ shall be concrete of a mix not
leaner than one part cement, two and one-half parts sand, and five parts stone.
✔✔- 1/2 in. x 2 in. for 4" to 6" pipe
- 5/8 in. x 2 1/2 in. for 8" to 10" pipe
- 5/8 in. x 3 in. for 12" Pipe - ✔✔Restraint clamps for private fire service mains shall
have the following dimensions:
✔✔5/8 in. in diameter - ✔✔Rods shall not be less than _________________________
✔✔5/8 in. for pipe sizes 4", 6", and 8"
, 3/4 in. for 10" pipe
7/8 in. for 12" pipe - ✔✔Clamp bolts shall have the following diamters:
✔✔5/8 in x 3 in. for 4", 6", 8", and 10" pipe
3/4 in. x 3 1/2 in. for 12" pipe - ✔✔Cast iron washers shall have the following
dimensions:
✔✔1/2 in. x 3 in. for 4", 6", 8", and 10" pipe
1/2 in. x 3 1/2 in. for 12" pipe - ✔✔Steel washers shall have the following dimensions:
✔✔5/8 in. thick and 2 1/2 in. wide for 4", 6", 8", and 10"
5/8 in. thick and 3 in. wide for 12" pipe - ✔✔Restraint straps for tees shall have the
following dimensions:
✔✔1/16 in. larger - ✔✔The diamter of rod holes shall be _________________ than that
of rods
✔✔Bell ends - ✔✔_______________ shall be installed facing uphill
✔✔restrained - ✔✔Pipe shall be ____________________________ at the bottom of a
hill and at any turns (lateral or vertical).
✔✔flushed - ✔✔UG piping, from the water supply to the system riser, and lead-in
connections to the system riser, including all hydrants, shall be completely
________________ before the connection is made to downstream fire protection
system piping.
✔✔Suction piping - ✔✔__________________________ supplying fire pumps shall be
flushed prior to connecting to the fire pumps based on the requirements of NFPA 20
✔✔200 psi or 50 psi, +/- 5 psi - ✔✔All piping and attached appurtenances subjected to
system working pressure shall be hydrostatically tested at gauge pressure of
___________________ in excess of the system working pressure, whichever is greater
and shall maintain that pressure at gauge pressure of _________________ for 2 hours
✔✔1.) A gauge located at one of the hydrant outlets
2.) A gauge located at the lowest point where no hydrants are provided - ✔✔The test
pressure shall be read from one of the following, located at the lowest elevation of the
system or the portion of the system being tested:
✔✔forward flow - ✔✔The backflow prevention assembly shall be
___________________ tested
AND SOLUTIONS RATED A+
✔✔insulated against the passage of an electric current - ✔✔Where it is necessary to
join metal pipe with pipe of dissimilar metal, the joint shall be
_______________________________ using an approved method.
✔✔Top of the piping to the final grade - ✔✔The depth of piping shall be measured from
the _______________
✔✔NFPA 13 - ✔✔Where private fire service mains are installed aboveground, they shall
be protected from freezing in accordance with _______________________
✔✔the same distance - ✔✔Where piping is installed adjacent to a vertical face, it shall
be installed from the vertical face at ___________________________ as if the piping
were buried
✔✔10 ft - ✔✔Private fire service mains supplying fire protection systems within the
building shall be permitted to extend horizontally no more than _________________
cumulatively, as measured from the outside of the building, under the building to the
riser location.
✔✔12 inches - ✔✔Piping shall be installed a minimum of _______________ below the
bottom of building foundations or footers EXCEPT for when the piping is sleeved with
an approved material.
✔✔10 ft - ✔✔Private fire service mains shall not be permitted to extend more
than_________________ under the building EXCEPT for when they are run in a
covered trench.
✔✔valve - ✔✔Where piping is installed in a trench as permitted by 10.4.3.2.1, a
_______________ shall be provided where the underground piping enters the trench.
✔✔Thrust Blocks - ✔✔_________________________ shall be concrete of a mix not
leaner than one part cement, two and one-half parts sand, and five parts stone.
✔✔- 1/2 in. x 2 in. for 4" to 6" pipe
- 5/8 in. x 2 1/2 in. for 8" to 10" pipe
- 5/8 in. x 3 in. for 12" Pipe - ✔✔Restraint clamps for private fire service mains shall
have the following dimensions:
✔✔5/8 in. in diameter - ✔✔Rods shall not be less than _________________________
✔✔5/8 in. for pipe sizes 4", 6", and 8"
, 3/4 in. for 10" pipe
7/8 in. for 12" pipe - ✔✔Clamp bolts shall have the following diamters:
✔✔5/8 in x 3 in. for 4", 6", 8", and 10" pipe
3/4 in. x 3 1/2 in. for 12" pipe - ✔✔Cast iron washers shall have the following
dimensions:
✔✔1/2 in. x 3 in. for 4", 6", 8", and 10" pipe
1/2 in. x 3 1/2 in. for 12" pipe - ✔✔Steel washers shall have the following dimensions:
✔✔5/8 in. thick and 2 1/2 in. wide for 4", 6", 8", and 10"
5/8 in. thick and 3 in. wide for 12" pipe - ✔✔Restraint straps for tees shall have the
following dimensions:
✔✔1/16 in. larger - ✔✔The diamter of rod holes shall be _________________ than that
of rods
✔✔Bell ends - ✔✔_______________ shall be installed facing uphill
✔✔restrained - ✔✔Pipe shall be ____________________________ at the bottom of a
hill and at any turns (lateral or vertical).
✔✔flushed - ✔✔UG piping, from the water supply to the system riser, and lead-in
connections to the system riser, including all hydrants, shall be completely
________________ before the connection is made to downstream fire protection
system piping.
✔✔Suction piping - ✔✔__________________________ supplying fire pumps shall be
flushed prior to connecting to the fire pumps based on the requirements of NFPA 20
✔✔200 psi or 50 psi, +/- 5 psi - ✔✔All piping and attached appurtenances subjected to
system working pressure shall be hydrostatically tested at gauge pressure of
___________________ in excess of the system working pressure, whichever is greater
and shall maintain that pressure at gauge pressure of _________________ for 2 hours
✔✔1.) A gauge located at one of the hydrant outlets
2.) A gauge located at the lowest point where no hydrants are provided - ✔✔The test
pressure shall be read from one of the following, located at the lowest elevation of the
system or the portion of the system being tested:
✔✔forward flow - ✔✔The backflow prevention assembly shall be
___________________ tested
