Hazards and Safety Flashcards
(45 cards)
Fire what is it
Chemical reaction when material reacts with oxygen
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
How to extinguish
eliminate O2 or level of heat present
Flash point
lowest temperature at which a liquid gives of enough vapor to ignite. The lower the flash point the easier to ignite
Classes of Fire
A- D
How are class A fires fueled
By materials that leave a residue after burning like ash so wood, cardboard paper etc
How are class A fires eliminated and with what
Gone through cooling effect by h2O , foam, dry or wet chemicals
How are Class B fires started
flammable liquids and gasses like gasoline, paint thinner, acetylene
How are class B fires eliminated and with what
Remove the oxygen using foam, dry chemical and CO2
How are Class C fires started
through electrical wiring so computers and motors
How are class C fires eliminated and with what
Non conducting agent - never use water. CO2, Dry chemical powder
How are Class D fires started
Metals and compounds Magnesium, NA, Tit, Ph
How are class D fires eliminated and with what
dry chemical extinguishers specifically for combustible metals
How do you know if the fire extinguisher will work
The label shows you what class of fires it can be used on
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
Why are fire drill conducted
- practice fire response training
- Reinforce fire safety and evaluate staff knowledge
- to ensure drill provide maximum benefit
Physical hazard examples
cryogenic fluid - liquid N
electrical equipment
glassware
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)
ergonomic hazards
Improper furniture
- bone injuries
- excessive noise
- slips and falls
Reproductive hazards
fetoxicity from solvents, mercury, radiation, virus, and biological agents
Air quality hazards
temp, humidity, air flow, air quality
Chemical hazards examples
flammable liquids, gases
toxic fumes and gases
caustic solvents
carcinogenic or mutagenic solvents
psycho social hazard
stress, abuse, violence, conflict between coworkers
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