Minnesota Journeyman Sprinkler Fitter Examination
1. What is the Standard Coverage Area:
coverage area NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) typically
for Light Hazard specifies a maximum coverage area of 225 square feet per sprinkler head for Light
heads? Hazard occupancies. However, this can be reduced to 200 square feet in certain
scenarios
2. What is the cov- The coverage area for Ordinary Hazard sprinkler heads depends on whether
erage area for you're discussing Ordinary Hazard Group 1 or Ordinary Hazard Group 2 occu-
Ordinary Hazard pancies:
heads? Ordinary Hazard Group 1 (OH-1)
Maximum Coverage Area: 130 square feet per sprinkler head is the typical maxi-
mum allowed by NFPA 13.
Example Occupancies: Light manufacturing, warehouses storing non-com-
bustible materials.
Ordinary Hazard Group 2 (OH-2)
Maximum Coverage Area: 100 square feet per sprinkler head is the typical maxi-
mum allowed by NFPA 13.
Example Occupancies: Warehouses with high piled combustibles, parking
garages, car dealerships.
3. What is the Typical Coverage Areas:
coverage area NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) often
for Extra Hazard specifies a maximum coverage area of 90-130 square feet per sprinkler head for
heads? Extra Hazard occupancies.
Specific Variations: The exact coverage area depends on factors like the type of
hazard, storage arrangement, and the specific sprinkler listing.
4. What is the cov- 100 sq ft
erage area for
ESFR heads?
5. 100 sq ft or 130 sq ft
, Minnesota Journeyman Sprinkler Fitter Examination
What is the cov-
erage area for
Storage heads?
6. Minimum air 75 psi
pressure for a
pressure tank
7. What pipe sizes must be connected to mains at least 2½" in diameter
can feed 1½" 1" for horizontal runs up to 20'
hose lines and 1¼" for 20' to 80'
for what length 1½" for runs over 80'
8. What are the ordinary - orange or red
bulb colors for intermediate - yellow or green
each tempera- high - blue
ture rating extra high - purple
very extra high - black
ultra high - black
9. How often is 5 years for all, 3 years for tanks without corrosion protection
the interior of a
pressure tank in-
spected
10. How often do you 5 years
flow standpipes
11. How many heads 10
can be taken off
a cold weather
valve
, Minnesota Journeyman Sprinkler Fitter Examination
12. Hanger spacing 1" - 3'
from end of pipe 1¼" - 4'
1½" and up - 5'
13. Duration of wa- system demand times 10 minutes
ter supply for
NFPA 13D sys-
tems
14. Why is a check prevent evaporation of priming water into system
valve with a 3/32"
hole in Clapper
required to be in-
stalled in the sys-
tem riser below
the test valve in
freezer spaces
15. Maximum time 5 minutes
allowed for wa-
ter flow alarms to
sound
16. what pressure 50 gpm at system pressure
and flow are 1½"
hose stations de-
signed for
17. class III and class 250 gpm @ 100 psi
I standpipe sys-
tems are de-
signed for what
, Minnesota Journeyman Sprinkler Fitter Examination
pressures and
flows
18. class II standpipe 100 gpm @ 65 psi
systems are de-
signed for what
pressures and
flows
19. Acceptance tests hydro test, air test, alarm test
required for dry
pipe systems
20. flow of a master at least 250 gpm
stream is?
21. bypass around 8 hours, 2" diameter
check valve on
tank shall be re-
quired to fill the
tank in how many
hours? what is
the minimum
size of this by-
pass?
22. minimum 5 seconds
amount of time
to close a valve?
23. why is the eccen- to prevent air pockets
tric reducer on
1. What is the Standard Coverage Area:
coverage area NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) typically
for Light Hazard specifies a maximum coverage area of 225 square feet per sprinkler head for Light
heads? Hazard occupancies. However, this can be reduced to 200 square feet in certain
scenarios
2. What is the cov- The coverage area for Ordinary Hazard sprinkler heads depends on whether
erage area for you're discussing Ordinary Hazard Group 1 or Ordinary Hazard Group 2 occu-
Ordinary Hazard pancies:
heads? Ordinary Hazard Group 1 (OH-1)
Maximum Coverage Area: 130 square feet per sprinkler head is the typical maxi-
mum allowed by NFPA 13.
Example Occupancies: Light manufacturing, warehouses storing non-com-
bustible materials.
Ordinary Hazard Group 2 (OH-2)
Maximum Coverage Area: 100 square feet per sprinkler head is the typical maxi-
mum allowed by NFPA 13.
Example Occupancies: Warehouses with high piled combustibles, parking
garages, car dealerships.
3. What is the Typical Coverage Areas:
coverage area NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) often
for Extra Hazard specifies a maximum coverage area of 90-130 square feet per sprinkler head for
heads? Extra Hazard occupancies.
Specific Variations: The exact coverage area depends on factors like the type of
hazard, storage arrangement, and the specific sprinkler listing.
4. What is the cov- 100 sq ft
erage area for
ESFR heads?
5. 100 sq ft or 130 sq ft
, Minnesota Journeyman Sprinkler Fitter Examination
What is the cov-
erage area for
Storage heads?
6. Minimum air 75 psi
pressure for a
pressure tank
7. What pipe sizes must be connected to mains at least 2½" in diameter
can feed 1½" 1" for horizontal runs up to 20'
hose lines and 1¼" for 20' to 80'
for what length 1½" for runs over 80'
8. What are the ordinary - orange or red
bulb colors for intermediate - yellow or green
each tempera- high - blue
ture rating extra high - purple
very extra high - black
ultra high - black
9. How often is 5 years for all, 3 years for tanks without corrosion protection
the interior of a
pressure tank in-
spected
10. How often do you 5 years
flow standpipes
11. How many heads 10
can be taken off
a cold weather
valve
, Minnesota Journeyman Sprinkler Fitter Examination
12. Hanger spacing 1" - 3'
from end of pipe 1¼" - 4'
1½" and up - 5'
13. Duration of wa- system demand times 10 minutes
ter supply for
NFPA 13D sys-
tems
14. Why is a check prevent evaporation of priming water into system
valve with a 3/32"
hole in Clapper
required to be in-
stalled in the sys-
tem riser below
the test valve in
freezer spaces
15. Maximum time 5 minutes
allowed for wa-
ter flow alarms to
sound
16. what pressure 50 gpm at system pressure
and flow are 1½"
hose stations de-
signed for
17. class III and class 250 gpm @ 100 psi
I standpipe sys-
tems are de-
signed for what
, Minnesota Journeyman Sprinkler Fitter Examination
pressures and
flows
18. class II standpipe 100 gpm @ 65 psi
systems are de-
signed for what
pressures and
flows
19. Acceptance tests hydro test, air test, alarm test
required for dry
pipe systems
20. flow of a master at least 250 gpm
stream is?
21. bypass around 8 hours, 2" diameter
check valve on
tank shall be re-
quired to fill the
tank in how many
hours? what is
the minimum
size of this by-
pass?
22. minimum 5 seconds
amount of time
to close a valve?
23. why is the eccen- to prevent air pockets
tric reducer on
