Flashcards in Hazards and Safety Deck (45)
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1
Fire what is it
Chemical reaction when material reacts with oxygen
2
Parts of the fire triangle
Fuel - combustible solid , liquid or gas
Oxygen - from the air 16% is needed for sustainability
Heat - to initially ignite the fire and to sustain it
3
How to extinguish
eliminate O2 or level of heat present
4
Flash point
lowest temperature at which a liquid gives of enough vapor to ignite. The lower the flash point the easier to ignite
5
Classes of Fire
A- D
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How are class A fires fueled
By materials that leave a residue after burning like ash so wood, cardboard paper etc
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How are class A fires eliminated and with what
Gone through cooling effect by h2O , foam, dry or wet chemicals
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How are Class B fires started
flammable liquids and gasses like gasoline, paint thinner, acetylene
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How are class B fires eliminated and with what
Remove the oxygen using foam, dry chemical and CO2
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How are Class C fires started
through electrical wiring so computers and motors
11
How are class C fires eliminated and with what
Non conducting agent - never use water. CO2, Dry chemical powder
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How are Class D fires started
Metals and compounds Magnesium, NA, Tit, Ph
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How are class D fires eliminated and with what
dry chemical extinguishers specifically for combustible metals
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How do you know if the fire extinguisher will work
The label shows you what class of fires it can be used on
15
How to use an extinguisher
P-pull the pin at the handle
A- Aim nozzle at base of fire
S- Squeeze lever slowly
s-Sweep from side to side
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Why are fire drill conducted
- practice fire response training
-Reinforce fire safety and evaluate staff knowledge
-to ensure drill provide maximum benefit
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Physical hazard examples
cryogenic fluid - liquid N
electrical equipment
glassware
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Radiation Hazard examples
-external exposure (e ray, gamma rays)
-Internal exposure (absorption - alpha particles, inhalation, beta particles and gamma rays)
-radioactive spills and non ionization radiation (lasers, UV and Microwave)
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ergonomic hazards
Improper furniture
-bone injuries
-excessive noise
-slips and falls
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Reproductive hazards
fetoxicity from solvents, mercury, radiation, virus, and biological agents
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Air quality hazards
temp, humidity, air flow, air quality
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Chemical hazards examples
flammable liquids, gases
toxic fumes and gases
caustic solvents
carcinogenic or mutagenic solvents
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psycho social hazard
stress, abuse, violence, conflict between coworkers
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Thermal Burn and causes
burns from external heat sources that raise the temperature of the skin and tissues causing cell death or charring. Hot metals , steam, flame
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Radiation burns and causes
Sun burn - UV lights or radiation xrays or gamma rays
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Chemical burns
Bases, detergents, solvents in contact with skin
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Electrical burns
from electrical current from Alternating current (AC) or direct current (DC)
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How to prevent and give first aid for spills on skin
Prevent by wearing PPEs
First aid - remove contaminated PPE and run under cold h2o for 15 mins or until it stops hurting
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How to prevent and give first aid for strong acid
Prevent - rubber apron and gloves
First aid - remove PPE and under colf h2o for 15 or until it stops hurting
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