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Engineer Study Guide > FIRE PROTECTION/DETECTION > Flashcards

FIRE PROTECTION/DETECTION Flashcards

1
Q

Types of heat mech on sprinkler

A

Frangible link
Chemical pellet
Glass bulb

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2
Q

Ordinary sprinkler orifice

A

¹/₂”

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3
Q

Stamped on sprinkler

A

Temp, manufacture date and name, installation position

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4
Q

Sprinkler cabinet

A

6 heads and wrench

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5
Q

Control operating valves

A

Indicating and non-indicating.

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6
Q

Indicating valves

A

OS&Y
PIV
WPIV

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7
Q

135-170 degrees

A

Unpainted-ordinary

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8
Q

175-225 degrees

A

Intermediate- white

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9
Q

250-300 degrees

A

High- Blue

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10
Q

325-375

A

Extra High- red

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11
Q

400-475

A

Very extra high- green

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12
Q

500-575 degrees

A

Ultra high - orange

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13
Q

Alarm test valve

A

Connected to Supply side to simulate activation of syst.

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14
Q

Water flow alarm

A

Alarm check valve
Dry pipe valve
Deluge valve

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15
Q

Highest sprinkler in building

A

15 psi above residual

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16
Q

Tank bottom height

A

35 feet above highest sprinkler

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17
Q

Wet pipe system

A

Under pressure at all times

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18
Q

Chamber that prevents activation due to surge

A

Retard chamber

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19
Q

Retard chamber location

A

Between alarm check valve and alarm signaling equipment

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20
Q

Operation waterflow

A

Sprinkler opens–clapper open by pressure–Open auxiliary valve–enters auxiliary valve alarm and feels retard chamber–pressure switch–Electric alarm–water gong

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21
Q

System shutdown

A

Control valve and main drain

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22
Q

Clearance below sprinkler

A

18”

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23
Q

Dry pipe system

A

Large amount of air holding back a small amount of water

6:1

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24
Q

Dry pipe system pressure

A

15 to 50 psi

25
Q

Pre-action system

A

Dry system with deluge valve

Prevent against water damage

26
Q

Deluge system

A

Water flows through all heads

27
Q

CO2 extinguish system

A

29% CO2 will dilute combustion to extinguishment

28
Q

Is CO2 effective for class A fires

29
Q

CO2 effective for

A

Flammable liquid tanks

Electrical hazard

30
Q

Disadvantage of CO2 SYST

A

Re-ignition possible
¹/₁₀ effective as water
Asphyxiation

31
Q

CO2 pressure

A

300 psi-850 psi

32
Q

Halon

A

Halogenated hydrocarbons

33
Q

4 CO2 methods

A

Total flooding
Local application
Extended discharge
Hand lines

34
Q

Halogen series

A

Flourine
Chlorine
Bromine
Iodine

35
Q

Halon works due to…….

A

Breaking chain reactions

36
Q

Most common halon

37
Q

Toxicity of 1301

A

Less than CO2

38
Q

1301 percentages

A

7% safe for people

20% hazardous

39
Q

Dry chemical types

A

Monoammonium phosphate
Sodium Bicarbonate
Potassium chloride

40
Q

Four components of foam

A

Water, Air, foam concentrate, mechanical agitation

41
Q

Class 1 standpipe

A

For FD 2 1/2” hose

42
Q

Class 2 standpipe

A

Building occupants

43
Q

Class 3 standpipe

A

FD and building occupants

44
Q

Water supply for a class one standpipe

A

500 GPM 30 minutes

45
Q

Water supply for a class 2 standpipe

A

100 GPM 30 minutes

46
Q

Top residual for class one standpipe

A

65 PSI with water flowing 500 GPM

47
Q

Standpipe height limitation

A

275 feet unless zoned

48
Q

Hydro for standpipe systems

A

Five years 25 psi

49
Q

NFPA 13E

A

Operation of standpipes

50
Q

Class a fire extinguisher ratings

A

1A-40A rated on extinguishing potential

51
Q

Class B extinguisher ratings

A

1B-640B square footage 8 inches deep

52
Q

Professional square footage for class B extinguisher

A

2.5 times as much as civilian

53
Q

Class C extinguisher ratings

A

No rating nonconductive only

54
Q

Alarm system components

A 
Control panel
Initiating device
Signal device
Power source
Auxiliary power source
55
Q

Alarm system initiating devices

A

Pull box
fire detector
System activation

56
Q

Types of fire detectors

A

Smoke, heat, ionizing gases, light

57
Q

Distance between pull stations

58
Q

NFPA 72E

59
Q

NFPA 13

A

Installation of sprinklers

Engineer Study Guide (19 decks)

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