Expt No.1 Student Activity:
Safety signs inform and warn you of hazards and risks in the workplace, tell you what to do in an emergency
situation and show you how to protect yourself and work safely. You should always follow safety signs to help
keep you and the people around you safe.
S.
N. Symbol Meaning or purpose
1 Prohibition Sign (P)
No Smoking
Red circle and slash signs show an activity is not permitted.
Flammable Material
Danger signs can be found in laboratories, trade shops,
chemical storage areas, central plant
2 Prohibition Sign (P )
Do not touch object
Red circle and slash signs show an activity is not permitted.
Danger signs consist of the colors red, black, and white only.
3 Warning Sign (W) Caution
High Voltage
Yellow triangle signs warn there are hazards in the area.
Warning signs shall be used to indicate a potentially
hazardous
situation which, if not avoided, could result in death or
serious
injury.
4 Mandatory Signs (M ) Command : You must do
Safety gloves must be worn
Blue circle signs show what personal protective equipment
must be worn
5 Warning Sign (W ) Caution
General mandatory sign ( to be accompanied where
necessary
by another sign )
Yellow triangle signs warn there are hazards in the area
, 6 Mandatory Signs (M ) Command ,You must do
Safety boots must be worn
Blue circle signs show what personal protective equipment
must be worn
7 Warning Sign (W ) Caution
Radiation warning sign
Indicate the types of exposure levels that may be present in
the
lab or area. Magenta or black on a yellow background are the
internationally recognized colors used to signify the presence
of ionizing radiation. The symbol used is called the trefoil.
8 Prohibition Sign (P )
No pedestrian access
Red circle and slash signs show an activity is not permitted
Conclusion:
Safety signs inform and warn you of hazards and risks in the workplace, tell you what to do in an
emergency situation and show you how to protect yourself and work safely. You should always follow
safety signs to help keep you and the people around you safe.
Marks Dated signature of teacher
,Expt. No.2 Student Activity:
Fire is a self-sustaining, chemical chain reaction with varying degrees of light and heat. Labeling on the fire
extinguisher identifies which class of fire it is appropriate for; Class A, B, C, D or K and instructions on how
to use it.
Type Application Symbol
of fire
extingui
shers
A
Water Extinguisher
They are used for Class A fires
Water removes heat and extinguishes the
fire.
Water must not be used on fires involving
live
electrical equipment as it can cause
electrocution.
Water must not be used on metal fires.
B
Carbon Dioxide Fire Extinguisher
Fires that involve flammable liquids,
including
paraffin, petrol and oil.
Flammable liquids gasoline, oil, grease,
acetone. Includes flammable gases.
C
A powder is released and acts as a blanket
which suffocates and cools the flames
Electrical energized electrical equipment.
D Fires involving combustible metals such as
magnesium, aluminium, zinc, sodium,
potassium etc., when the burning metals are
reactive to water containing agents and in
certain cases carbon dioxide, halogenated
hydrocarbons and ordinary dry powders.
These
fire require special media and techniques to
extinguish.
, Conclusion:
When selecting locations for fire extinguishers, due consideration should be given to the nature of risk
to be covered. Ex. Class of Fire risk involved. The extinguishers should be placed in visible positions
and shall be readily accessible for immediate use in all parts of occupancy. Generally, fire
extinguishers should be placed as near as possible to exits or stair lands without hindering the escape
routes. Extinguishers should be sited in such a way that the user may not have to travel more than 15 m
from the site of the fire to reach the extinguishers
Marks Dated signature of teacher
Safety signs inform and warn you of hazards and risks in the workplace, tell you what to do in an emergency
situation and show you how to protect yourself and work safely. You should always follow safety signs to help
keep you and the people around you safe.
S.
N. Symbol Meaning or purpose
1 Prohibition Sign (P)
No Smoking
Red circle and slash signs show an activity is not permitted.
Flammable Material
Danger signs can be found in laboratories, trade shops,
chemical storage areas, central plant
2 Prohibition Sign (P )
Do not touch object
Red circle and slash signs show an activity is not permitted.
Danger signs consist of the colors red, black, and white only.
3 Warning Sign (W) Caution
High Voltage
Yellow triangle signs warn there are hazards in the area.
Warning signs shall be used to indicate a potentially
hazardous
situation which, if not avoided, could result in death or
serious
injury.
4 Mandatory Signs (M ) Command : You must do
Safety gloves must be worn
Blue circle signs show what personal protective equipment
must be worn
5 Warning Sign (W ) Caution
General mandatory sign ( to be accompanied where
necessary
by another sign )
Yellow triangle signs warn there are hazards in the area
, 6 Mandatory Signs (M ) Command ,You must do
Safety boots must be worn
Blue circle signs show what personal protective equipment
must be worn
7 Warning Sign (W ) Caution
Radiation warning sign
Indicate the types of exposure levels that may be present in
the
lab or area. Magenta or black on a yellow background are the
internationally recognized colors used to signify the presence
of ionizing radiation. The symbol used is called the trefoil.
8 Prohibition Sign (P )
No pedestrian access
Red circle and slash signs show an activity is not permitted
Conclusion:
Safety signs inform and warn you of hazards and risks in the workplace, tell you what to do in an
emergency situation and show you how to protect yourself and work safely. You should always follow
safety signs to help keep you and the people around you safe.
Marks Dated signature of teacher
,Expt. No.2 Student Activity:
Fire is a self-sustaining, chemical chain reaction with varying degrees of light and heat. Labeling on the fire
extinguisher identifies which class of fire it is appropriate for; Class A, B, C, D or K and instructions on how
to use it.
Type Application Symbol
of fire
extingui
shers
A
Water Extinguisher
They are used for Class A fires
Water removes heat and extinguishes the
fire.
Water must not be used on fires involving
live
electrical equipment as it can cause
electrocution.
Water must not be used on metal fires.
B
Carbon Dioxide Fire Extinguisher
Fires that involve flammable liquids,
including
paraffin, petrol and oil.
Flammable liquids gasoline, oil, grease,
acetone. Includes flammable gases.
C
A powder is released and acts as a blanket
which suffocates and cools the flames
Electrical energized electrical equipment.
D Fires involving combustible metals such as
magnesium, aluminium, zinc, sodium,
potassium etc., when the burning metals are
reactive to water containing agents and in
certain cases carbon dioxide, halogenated
hydrocarbons and ordinary dry powders.
These
fire require special media and techniques to
extinguish.
, Conclusion:
When selecting locations for fire extinguishers, due consideration should be given to the nature of risk
to be covered. Ex. Class of Fire risk involved. The extinguishers should be placed in visible positions
and shall be readily accessible for immediate use in all parts of occupancy. Generally, fire
extinguishers should be placed as near as possible to exits or stair lands without hindering the escape
routes. Extinguishers should be sited in such a way that the user may not have to travel more than 15 m
from the site of the fire to reach the extinguishers
Marks Dated signature of teacher
