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nfpa 13 > General questions > Flashcards

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?

A

1 inch

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?

A

8

24
Q

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

A

20 heads

25
Q

When a system is calculated where do you start?

A

The most remote location?

26
Q

Sprinklers under glass or plastic skylights shall be what temperature classification?

A

Intermediate

27
Q

Residential sprinklers shall be spaced to a max spacing of?

A

144 square feet

28
Q

What is a manual standpipe?

A

A standpipe that relies solely on the FDC to supply system demand.

nfpa 13 (1 decks)

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