General questions Flashcards

MN Test

1
Q

What is the minimum operating pressure for sprinkler heads?

A

7 PSI

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2
Q

A PRV is set to what pressure?

A

175 PSI

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3
Q

What is the minimum discharge of a residential sprinkler head?

A

18 gpm

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4
Q

What distance should a hose valve be off of the floor?

A

3 to 5ft

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5
Q

Distance the FDC should be off the ground?

A

18 in to 48 in

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6
Q

What is the Minnesota State Fire Code

A

299M

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7
Q

What is the max zone square footage for extra hazard occupancy?

A

25,000 square ft

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8
Q

What is the max distance between hangers for 1 in sch 40 pipe?

A

12 ft

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9
Q

Who invented pipe calculations?

A

Hazen Williams

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10
Q

How much weight should a single hanger support?

A

Five times the weight of water filled pipe plus 250 pounds.

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11
Q

How many gauges are on a dry system?

A

2

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12
Q

What is the pitch of pipe on a dry system?

A

1/2” per 10ft on branch lines

1/4 per 10ft on mains

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13
Q

How many heads do you calculate on an NFPA 13R system?

A

4

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14
Q

What is the Maximum time for a compressor to fill a dry system?

A

30 minutes

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15
Q

Post indicating valves should be at least how many feet away from a building?

A

40 ft

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16
Q

When does the journeyman license expire?

A

June 30th every year

17
Q

What are the conditions of the small room rule?

A

Light hazard occupancy
Less than 800 square feet
A head can be up to 9 ft off of one wall

18
Q

Universal code that deals with fire protection?

A

Uniform fire code

19
Q

What is the minimum protection area for ESFR heads?

A

80 square feet

20
Q

What materials are left for the owners after a job is completed?

A

NFPA25
As Builts
Instructions on products

21
Q

What clearance is needed around pipe in a pump house that passes through a wall?

22
Q

What areas can be omitted in NFPA 13R?

A

Bathrooms under 55 square feet

Closets under 24 square feet

23
Q

How many heads are allowed on a branch line on either side of a cross main?

24
Q

How many heads on a system before a FDC is required?

25
When a system is calculated where do you start?
The most remote location?
26
Sprinklers under glass or plastic skylights shall be what temperature classification?
Intermediate
27
Residential sprinklers shall be spaced to a max spacing of?
144 square feet
28
What is a manual standpipe?
A standpipe that relies solely on the FDC to supply system demand.