WMSU Lec2
WMSU Lec2
WMSU Lec2
SAFETY
WMSU BS MECHANICAL ENGINEERING
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Workplace Hazards
Safety Hazards
Something that has a potential for
injury
Health Hazards
Something that has a potential to
cause illness
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Safety Hazards – something that has potential to cause injury
• Poor housekeeping hazards
• Fire hazards
• Machine hazards
• Material handling hazards
• Electrical hazards
Poor Housekeeping
Fire
Use of Machine
Material Handling
Electricity
1. POOR HOUSEKEEPING
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Housekeeping
Housekeeping is not just keeping your workplace clean and
safe but it is an effective workplace organization.
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What is fire?
It is a chemical reaction between a flammable or combustible
substance and oxygen.
Open flames
Hot surfaces
Friction
Cutting / welding
Electrical spark
Some Facts About Oxygen
At 23% concentration, the
At 16% concentration,
atmosphere is considered
combustion is slowed down
oxygen enriched and fire will
and will eventually diminish.
intensify.
At 12 – 14% concentration,
flammable liquids will not
burn.
Fires Can Be Classified According To The Fuel
It Consumes
Class Examples Pictogram
A – Ordinary Combustibles paper, wood, or plastic
Deprivation of oxygen
Source: BFP
Tragic Fire Incidents In The Philippines
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Materials Handling
A technique which includes the art of lifting, placing,
storing or moving of materials through the use of
appropriate handling equipment and men.
Manual Handling
is the of lifting, transporting and packaging of products using
own physical strength.
Hand operated handling, transporting and packaging of
products.
Mechanical Handling
pertains to more rigid, powered and non-powered mechanics
mainly for handling bulky and heavy items
Hazards Associated with Materials
Handling
Falling load
Collision
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What is Electricity?
A form of energy resulting from the existence of
charged particles. Electricity is the flow of moving
electrons. When the electrons flow it is called an
electrical current.
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Risk Electrical
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Electricity and Water
The likelihood of being shock is greatly
multiplied in damp locations
People are excellent conductors
Never use electrical equipment in damp or wet
areas
Do Not spray water around any electrical source
Important Terminologies
Current (amperes)
is the amount of electricity flow in a conductor.
Voltage (volts)
is the force which causes electrons to flow in
a conductor.
Resistance (ohms)
is the opposition of a material to the flow of
electricity.
High Voltage Low Voltage
660 volts or more less than 660 volts
More Frequent Accidents Happen
at Low Voltage Areas
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What is a Machine?
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Where Mechanical
Hazards Occur
other moving parts
power transmission
point of operation
Hazards Associated With Machines
workpiece
exposed machine movement projectile
parts hazards
noise
Hazardous Mechanical Motions
Loss in productivity.
Damaged equipment.
Risk Mechanical
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