Minnesota Journeyman Sprinkler Fitter
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clearly, and perform confidently in exams.
Inside this guide, you will find complete exam questions paired with correct, detailed
answers that explain the reasoning behind each response. The structured format allows you to
focus on important and frequently tested topics, helping you study efficiently and effectively.
🔥 Key Highlights
✔ Complete Exam Questions covering major concepts
✔ Correct Answers with Detailed Explanations for deeper understanding
✔ Exam-Focused Content based on commonly tested material
✔ Well-Organized Format for quick and effective revision
✔ Latest Updated Version for reliable exam preparation
✔ Ideal for Fast Review and Last-Minute Study
🚀 Why Students Prefer This Guide
This study guide helps students simplify complex topics, identify key concepts quickly, and
strengthen exam confidence. By practicing with structured questions and reviewing detailed
answers, you can improve retention and boost your chances of achieving higher scores.
🎯 Perfect For
,• Final exam preparation
• Midterm exam revision
• Weekly study sessions
• Practicing exam-style questions
• Strengthening knowledge before tests
📘 A reliable and effective study companion for students who want structured practice,
clear explanations, and stronger exam performance.
What is the coverage area for Light Hazard heads?
Standard Coverage Area:
NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) typically
specifies a maximum coverage area of 225 square feet per sprinkler head for Light
Hazard occupancies. However, this can be reduced to 200 square feet in certain
scenarios
What is the coverage area for Ordinary Hazard heads?
The coverage area for Ordinary Hazard sprinkler heads depends on whether you're
discussing Ordinary Hazard Group 1 or Ordinary Hazard Group 2 occupancies:
Ordinary Hazard Group 1 (OH-1)
Maximum Coverage Area: 130 square feet per sprinkler head is the typical maximum
allowed by NFPA 13.
Example Occupancies: Light manufacturing, warehouses storing non-combustible
materials.
Ordinary Hazard Group 2 (OH-2)
Maximum Coverage Area: 100 square feet per sprinkler head is the typical maximum
allowed by NFPA 13.
Example Occupancies: Warehouses with high piled combustibles, parking garages, car
dealerships.
What is the coverage area for Extra Hazard heads?
Typical Coverage Areas:
NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) often specifies a
maximum coverage area of 90-130 square feet per sprinkler head for Extra Hazard
occupancies.
Specific Variations: The exact coverage area depends on factors like the type of hazard,
storage arrangement, and the specific sprinkler listing.
What is the coverage area for ESFR heads?
100 sq ft
What is the coverage area for Storage heads?
100 sq ft or 130 sq ft
Minimum air pressure for a pressure tank
75 psi
,What pipe sizes can feed 1½" hose lines and for what length
must be connected to mains at least 2½" in diameter
1" for horizontal runs up to 20'
1¼" for 20' to 80'
1½" for runs over 80'
What are the bulb colors for each temperature rating
ordinary - orange or red
intermediate - yellow or green
high - blue
extra high - purple
very extra high - black
ultra high - black
How often is the interior of a pressure tank inspected
5 years for all, 3 years for tanks without corrosion protection
How often do you flow standpipes
5 years
How many heads can be taken off a cold weather valve
10
Hanger spacing from end of pipe
1" - 3'
1¼" - 4'
1½" and up - 5'
Duration of water supply for NFPA 13D systems
system demand times 10 minutes
Why is a check valve with a 3/32" hole in Clapper required to be installed in the
system riser below the test valve in freezer spaces
prevent evaporation of priming water into system
Maximum time allowed for water flow alarms to sound
5 minutes
what pressure and flow are 1½" hose stations designed for
50 gpm at system pressure
class III and class I standpipe systems are designed for what pressures and flows
250 gpm @ 100 psi
class II standpipe systems are designed for what pressures and flows
100 gpm @ 65 psi
Acceptance tests required for dry pipe systems
hydro test, air test, alarm test
flow of a master stream is?
at least 250 gpm
bypass around check valve on tank shall be required to fill the tank in how many
hours? what is the minimum size of this bypass?
8 hours, 2" diameter
minimum amount of time to close a valve?
5 seconds
why is the eccentric reducer on the suction side of the pump?
to prevent air pockets
, what color frame arms are on extra high temp sprinkler heads?
red
what percent of portable fire extinguishers can be removed if 1½" hose lines are
capable of reaching all parts of the building?
up to 50%
what did NFPA 231C govern?
rack storage
what type of pipe is not allowed for use in NFPA 13D?
aluminum or other pipe not listed
extra heavy pattern fittings shall be used when?
when pressures exceed 175 psi
what is the contractors certificate used for?
system acceptance
when are return bends used?
systems connected to non-potable water supplies
powder driven studs must have what attached to them?
increaser couplings
what size head orifice must be used when installing sprinklers in a kitchen hood
and a vent duct?
k-factors of 1.4 to 5.6
what temperature heads should be used for light, ordinary, and extra hazard?
ordinary
sidewall sprinklers shall not be used under what type of ceiling?
sloped ceilings or ceilings that aren't flat
are FDCs required for NFPA 13R systems?
all but single story buildings that are less than 2000 sq ft
pump rooms shall be lighted and heated?
yes
in scheduled systems, what are the maximum numbers of sprinkler heads that
can be taken off sizes 1" through 3"
1" - 2
1¼" - 3
1½" - 5
2" - 10
light hazard ordinary hazard
2½" - 30 2½" - 20
3" - 60 3" - 40
maximum time allowed for water to reach inspectors test on dry pipe system?
60 seconds
hanger spacing for steel pipe
1" & 1¼"
1½" to 8"
1" & 1¼" = 12'
1½" to 8" = 15'
hanger spacing for threadable lightwall steel pipe 1" to 3"
12'
Examination Premium General Exam Study
Guide – Complete Questions with Correct
Detailed Answers
⭐ Brand New Version | Exam-Focused | Designed for High
Scores
Take your exam preparation to the next level with this Premium General Exam Study Guide.
This powerful resource is designed to help students review faster, understand key concepts
clearly, and perform confidently in exams.
Inside this guide, you will find complete exam questions paired with correct, detailed
answers that explain the reasoning behind each response. The structured format allows you to
focus on important and frequently tested topics, helping you study efficiently and effectively.
🔥 Key Highlights
✔ Complete Exam Questions covering major concepts
✔ Correct Answers with Detailed Explanations for deeper understanding
✔ Exam-Focused Content based on commonly tested material
✔ Well-Organized Format for quick and effective revision
✔ Latest Updated Version for reliable exam preparation
✔ Ideal for Fast Review and Last-Minute Study
🚀 Why Students Prefer This Guide
This study guide helps students simplify complex topics, identify key concepts quickly, and
strengthen exam confidence. By practicing with structured questions and reviewing detailed
answers, you can improve retention and boost your chances of achieving higher scores.
🎯 Perfect For
,• Final exam preparation
• Midterm exam revision
• Weekly study sessions
• Practicing exam-style questions
• Strengthening knowledge before tests
📘 A reliable and effective study companion for students who want structured practice,
clear explanations, and stronger exam performance.
What is the coverage area for Light Hazard heads?
Standard Coverage Area:
NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) typically
specifies a maximum coverage area of 225 square feet per sprinkler head for Light
Hazard occupancies. However, this can be reduced to 200 square feet in certain
scenarios
What is the coverage area for Ordinary Hazard heads?
The coverage area for Ordinary Hazard sprinkler heads depends on whether you're
discussing Ordinary Hazard Group 1 or Ordinary Hazard Group 2 occupancies:
Ordinary Hazard Group 1 (OH-1)
Maximum Coverage Area: 130 square feet per sprinkler head is the typical maximum
allowed by NFPA 13.
Example Occupancies: Light manufacturing, warehouses storing non-combustible
materials.
Ordinary Hazard Group 2 (OH-2)
Maximum Coverage Area: 100 square feet per sprinkler head is the typical maximum
allowed by NFPA 13.
Example Occupancies: Warehouses with high piled combustibles, parking garages, car
dealerships.
What is the coverage area for Extra Hazard heads?
Typical Coverage Areas:
NFPA 13: NFPA 13 (Standard for the Installation of Sprinkler Systems) often specifies a
maximum coverage area of 90-130 square feet per sprinkler head for Extra Hazard
occupancies.
Specific Variations: The exact coverage area depends on factors like the type of hazard,
storage arrangement, and the specific sprinkler listing.
What is the coverage area for ESFR heads?
100 sq ft
What is the coverage area for Storage heads?
100 sq ft or 130 sq ft
Minimum air pressure for a pressure tank
75 psi
,What pipe sizes can feed 1½" hose lines and for what length
must be connected to mains at least 2½" in diameter
1" for horizontal runs up to 20'
1¼" for 20' to 80'
1½" for runs over 80'
What are the bulb colors for each temperature rating
ordinary - orange or red
intermediate - yellow or green
high - blue
extra high - purple
very extra high - black
ultra high - black
How often is the interior of a pressure tank inspected
5 years for all, 3 years for tanks without corrosion protection
How often do you flow standpipes
5 years
How many heads can be taken off a cold weather valve
10
Hanger spacing from end of pipe
1" - 3'
1¼" - 4'
1½" and up - 5'
Duration of water supply for NFPA 13D systems
system demand times 10 minutes
Why is a check valve with a 3/32" hole in Clapper required to be installed in the
system riser below the test valve in freezer spaces
prevent evaporation of priming water into system
Maximum time allowed for water flow alarms to sound
5 minutes
what pressure and flow are 1½" hose stations designed for
50 gpm at system pressure
class III and class I standpipe systems are designed for what pressures and flows
250 gpm @ 100 psi
class II standpipe systems are designed for what pressures and flows
100 gpm @ 65 psi
Acceptance tests required for dry pipe systems
hydro test, air test, alarm test
flow of a master stream is?
at least 250 gpm
bypass around check valve on tank shall be required to fill the tank in how many
hours? what is the minimum size of this bypass?
8 hours, 2" diameter
minimum amount of time to close a valve?
5 seconds
why is the eccentric reducer on the suction side of the pump?
to prevent air pockets
, what color frame arms are on extra high temp sprinkler heads?
red
what percent of portable fire extinguishers can be removed if 1½" hose lines are
capable of reaching all parts of the building?
up to 50%
what did NFPA 231C govern?
rack storage
what type of pipe is not allowed for use in NFPA 13D?
aluminum or other pipe not listed
extra heavy pattern fittings shall be used when?
when pressures exceed 175 psi
what is the contractors certificate used for?
system acceptance
when are return bends used?
systems connected to non-potable water supplies
powder driven studs must have what attached to them?
increaser couplings
what size head orifice must be used when installing sprinklers in a kitchen hood
and a vent duct?
k-factors of 1.4 to 5.6
what temperature heads should be used for light, ordinary, and extra hazard?
ordinary
sidewall sprinklers shall not be used under what type of ceiling?
sloped ceilings or ceilings that aren't flat
are FDCs required for NFPA 13R systems?
all but single story buildings that are less than 2000 sq ft
pump rooms shall be lighted and heated?
yes
in scheduled systems, what are the maximum numbers of sprinkler heads that
can be taken off sizes 1" through 3"
1" - 2
1¼" - 3
1½" - 5
2" - 10
light hazard ordinary hazard
2½" - 30 2½" - 20
3" - 60 3" - 40
maximum time allowed for water to reach inspectors test on dry pipe system?
60 seconds
hanger spacing for steel pipe
1" & 1¼"
1½" to 8"
1" & 1¼" = 12'
1½" to 8" = 15'
hanger spacing for threadable lightwall steel pipe 1" to 3"
12'
