Fire

Question 0

Combustible Liquid

Answer 0

100F < Flash point < 200F
Class II: 100F < FP < 140F
IIIA: 140F < FP < 200F
IIIB: 200F < FP

Question 1

Flammable Liquid

Answer 1

Flash point < 100F & vapor pressure < 73F; BP < 100F
IB: FP < 73F; BP >= 100F
IC: 73F < 100F

Question 2

Lower Flammability Limit

Answer 2

LFL * 100 = P* / 14.7

P*: vapor pressure of liquid at its flash point temp.

Question 3

BLEVE

Answer 3

Boiling Liquid-Expanding Vapor Explosion

Failure of a container at 1 atm holding a liquid above its boiling temperature

Question 4

Flammable Gas

Answer 4

UFL 12% at ambient P & T

Question 5

Halogenated Agents

Answer 5

Hydrocarbons w >= 1 H replaced w halogen. Code indicates how many C atoms, then how many H replaced w what halogen: F, Cl, Br, & I. Eg halon 1301 is methane w 3 Fl & 1 I. They extinguish by interfering w intermediate combustion process free radicals.

Question 6

Class A Fire

Answer 6

Ordinary combustible materials, eg wood, plastics, plant fibers.
Max Travel Dist for ext: 75’

Question 7

Class B Fire

Answer 7

Flammable or combustible liquids

Max travel Dist for ext: 50’ b/c of speed w which liquid fires get out of control

Question 8

Class C Fire

Answer 8

Energized electrical equipment. Class A or B extinguishers can extinguish once equipment de-energized.
No max travel Dist for ext

Question 9

Class D Fire

Answer 9

Combustible metals, eg Mg, Ti, Zr, Na, K.

Max travel Dist for ext: 75’

magnesium, titanium, zirconium, sodium, potassium.

Question 10

NEC Hazardous Locations

Answer 10

Class I: flammable vapors or gases
II: combustible dusts
III: ignitable fibers
Div. 1 vs 2: more vs less hazmat

Question 11

Sprinkler System Types

Answer 11

Dry Pipe, Wet Pipe, Pre-Action Automatic, Deluge, Combined Dry Pipe & Pre-action, Special & Limited Water Supply

Question 12

Dry Pipe Sprinkler System

Answer 12

Sprinkler heads attached to piping containing pressurized air or N2. S heads open upon heat, releasing gas. Fallen gas pressure opens water supply valve.

Question 13

Wet Pipe Sprinkler System

Answer 13

Piping always contains pressurized water. S heads open upon heating, releasing water.

Question 14

Pre-Action Automatic Sprinkler System

Answer 14

Operates as a wet piping system, except keeps pipes dry and uses automation to open the supply valve.

Question 15

Deluge Sprinkler System

Answer 15

Automatically activated system where ing sprinkler heads kept open at all times.

Question 16

Combined Dry Pipe & Pre-Action Sprinkler System

Answer 16

Uses a supplementary detection system to activate, besides heat opening of sprinkler heads.

Question 17

Special and Limited Water Supply Sprinkler System

Answer 17

Case-by-case basis according to manufacturer and lab testing.

Question 18

Sprinkler Head Color Code

Answer 18

38C, 100F   uncolored
66, 150        white
107, 225      blue
150, 300      red
190, 375      green
218, 425      orange