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Standard Spray Sprinklers Flashcards

1
Q

Predetermined testing bodies for sprinkler heads are

A

UL, ULC, FM

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2
Q

Thread sizes for sprinkler heads are

A

1/2”, 3/4, 1”

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3
Q

What is the sprinkler orfice held close with

A

Cap/plug that is secured by fusible element, tensioned with screw in deflector

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4
Q

What determines K factor

A

Orfice size

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5
Q

How much psi is required to create proper spray pattern

A

7psi

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6
Q

How many gpm is required to create proper spray pattern

A

15gpm

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7
Q

What is the standard spray k factor

A

5.6

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8
Q

K factor is

A

The amount of water that will flow through the orfice with 1 pound of pressure

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9
Q

What is the formula for figuring out the K factor, GPM, or PSI

A

Q
———
K | √P

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10
Q

How much water is directed downwards from sprinkler discharge

A

100%

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11
Q

What sprinkler must meet the minimum flow requirements?

A

The furtherest sprinkler from the fire pump/incoming

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12
Q

How sprinklers must be permanently marked with

A

-1-2 letters which indicate manufacturer
-3-4 numbers which indicate k factor, deflector characteristics, pressure rating, thermal sensitivity

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13
Q

Fusible element temp is selected based on

A

Ceiling temp

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14
Q

Why does a frangible bulb burst when heated

A

The liquid expands, compresses the air bubble, continues until glass breaks

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15
Q

What are solder link heads mostly constructed of

A

Alloy with pre determined melting points

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16
Q

Standard response response time index is

A

> 80 (greater than 80)

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17
Q

Fast response sprinklers response time index is

A

<50 less than

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18
Q

Response time index is calculated

A

(Meters-Second) 1/2

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19
Q

How must frame of upright be installed

A

Parallel to branch line piping to minimize obstruction

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20
Q

When must protective caps be removed

A

Right after install

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21
Q

Sprinklers subject to mechanical damage must be protected with

A

Listed guards

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22
Q

Available corrosive resistant coating include

A

Brass, chrome, polyester, PTFE, Wax, ENT, stainless

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23
Q

Who can paint heads

A

Only manufacturer

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24
Q

Head box shall contain what in addition to sprinklers

A

Paper with sprinkler identification number, or manufacturer, model, orfice, deflector type, thermal sensitivity, pressure rating

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25
Q

How many heads in head box on a site with less then 300 heads

A

6

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26
Q

How many heads in a head box on a site with 300-1000 heads

A

12

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27
Q

How many heads in a head box on a site with >1000 heads

A

24

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28
Q

Where can standard spray upright and pendants be installed

A

-all hazard classification types
-Quick response must be installed in light hazard
-Quick response not permitted to be installed in Extra hazard

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29
Q

Standard spray sidewalls can be used

A

Light & ordinary hazard with smooth, slopped, or flat ceilings
Not permitted in extra hazard
Below overhead doors

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30
Q

Max coverage area and max space for upright/pendant in light hazard

A

225ft2 and 15 feet

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31
Q

Max coverage area and max space for upright/pendant in ordinary hazard

A

130ft2 and 15’

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32
Q

Max coverage area and max space for upright/pendant in extra hazard

A

100ft2 and 12’

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33
Q

What’s the minimum distance from walls sprinkler heads need to be

A

4”

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34
Q

Small room only applies if

A

It’s light hazard
Unobstructed construction
800sq ft max
9’ max from one wall
Cannot exceed max coverage

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35
Q

3 types of sprinkler obstructions are

A

-To sprinkler discharge
-Spray pattern development
-To reach hazard

36
Q

Additional protection is required below obstructions greater then

37
Q

Standard spray side wall max coverage and max space in light hazard

A

196sq ft and 14’

38
Q

Standard spray side wall max coverage and max space in ordinary hazard

A

100 sq ft and 10’

39
Q

NFPA 13R is

A

Standard for sprinklers in buildings no more then 4 stories and no higher then 60’

40
Q

NFPA 13D is the standard for

A

Dwellings/homes

41
Q

Where are quick response sprinklers permitted with NFPA 13R

A

In compartments and where no more then 4 sprinklers are in a unit

42
Q

What’s the minimum density within a compartment NFPA 13R

A

0.10/ft squared

43
Q

How are non residential heads installed in NFPA 13R and 13D

A

In accordance with NFPA 13

44
Q

Where are quick response heads permitted in NFPA 13D

A

Closets, saunas, steam rooms

45
Q

Residential sprinklers can only be used on

A

Wet systems only

46
Q

Residential sprinklers must be how far from Ceiling

47
Q

Bathrooms under how big do not need sprinklers

A

55sq feet and under

48
Q

Closets cannot exceed what size

49
Q

Water delivery time for residential

A

15 seconds

50
Q

If a dry system is installed per NFPA 13R, what heads are to be used

A

Standard spray

51
Q

Minimum drain for NFPA 13R is

A

1” plus 1/2” Auxiliary drain on dry systems that may freeze if needed

52
Q

NFPA 13D minimum size drain is

53
Q

How is pipe pitched to drain in NFPA 13D

A

1/4” per 10’

54
Q

What is not required on NFPA 13D?

A

Fire department connection

55
Q

FDC is required in NFPA 13R if

A

The building exceeds 2000ft sq or more then one storey

56
Q

Minimum size for the FDC NFPA 13R

57
Q

NFPA 13R, more then 20 heads, what is the testing procedure

A

Hydro test for 200psi for 2 hours

58
Q

NFPA 13R where there is less then 20 heads how must testing be done

A

50 psi over normal system pressure

59
Q

Small room rule only applies in rooms

A

800 sq ft and less

60
Q

How far below ceilings can an standard spray upright be? (unobstructed)

61
Q

How far below ceilings can an standard spray upright be? (obstructed)

A

1-6” below structural member, no more then 22” from ceiling

62
Q

What is the clearance to storage for standard spray uprights and pendants

63
Q

What is the minimum distance between standard spray uprights and pendants

64
Q

What is the distance below ceilings for a standard spray side wall

65
Q

How far must standard spray sidewalls be apart

66
Q

Max ceiling temp for ordinary head

67
Q

Max ceiling temp for intermediate head

68
Q

Max ceiling temp for high head

69
Q

Max ceiling temp for extra high head

70
Q

Temp rating for ordinary heads

71
Q

Temp rating for intermediate heads

72
Q

Temp rating for high heads

73
Q

Temp rating for extra high heads

74
Q

Colour code for ordinary head

A

Uncoloured or black

75
Q

Colour code for intermediate head

76
Q

Colour code for high head

77
Q

Colour code for extra high head

78
Q

Glass bulb colour ordinary head

A

Red or orange

79
Q

Glass bulb colour intermediate head

A

Green or yellow

80
Q

Glass bulb colour high head

81
Q

Glass bulb colour extra high head

82
Q

Where can hi temp heads be used

A

Ordinary and extra hazard

83
Q

When installing upright sprinklers on a 6” main, what is the minimum length the candle can be

84
Q

Ceiling pockets in NFPA 13R and D cannot exceed

A

100ft cubed

85
Q

Ceiling pocket in NFPA 13R and D cannot exceed _____ in depth

86
Q

Ceiling pocket in NFPA 13 cannot exceed

A

1000ft cubed

87
Q

Ceiling pocket in NFPA 13 cannot exceed ____ in depth

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