Download Workplace Hazard Notes of IGC 2 PDF

TitleWorkplace Hazard Notes of IGC 2
TagsFuse (Electrical) Personal Protective Equipment Ac Power Plugs And Sockets Electric Shock
File Size2.7 MB
Total Pages74
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Document Text Contents
Page 1

NEBOSH National General Certificate

TOPICS OF (CONTROLLING WORKPLACE HAZARDS)

Safety Signs

Personal Protective Equipment

Manual Handling

Mechanical Handling & Transport Safety

Work Equipment

Maintenance

Electrical Safety

Fire

Chemical Hazards

Occupational Ventilation

Health Hazards

Ergonomics

Noise

Radiation

Construction, Demolition, & Excavation

Working Above Ground Level

Waste

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Page 2

NEBOSH National General Certificate
SAFETY SIGNS

Exercise1

State the shape and colors of the following types of safety signs and give example of each:

• Prohibition
• Warning
• Mandatory
• Safe condition

Answer 1

The sign Shape Color Example

Prohibition Circular White No smoking
WarninQ TrianQular Yellow Toxic substance
Mandatory Circular Blue Hearing protection

mandatory
Safe condition Rectangular Green First aid

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NEBOSH National General Certificate

CHEMICAL HAZARD

Exercise 1

State the effects on the body of the following types of hazardous substances giving a relevant
EXAMPLE of each:

-I rritant.
-Corrosion.
-Toxic
-Carcinogen

Answer 1

• Irritant: is a substance that causes an inflammation of skin, eyes or respiratory tract.
Examples: organic solvents, detergents & cement dust, ammonia, chlorine.

• Corrosive: is a substance the reacts with body proteins and has a penetrating and
burning effects on the parts of the body with which they come into contact "skin, eyes,
gastrointestinal tract".
Examples: phenol, ammonia, sulphuric acid, caustic soda, etc.

• Toxic: is a substance that has an adverse (poisonous) effect ona target organ or body
system. The substance causes its adverse effect when taken in relatively small dose.
The effect is either acute or chronic.
Example: lead, mercury, arsenic, etc.

• Carcinogens: are substances capable, often after long periods of exposure, causing
disorders to cell growth and may lead to cancer.
Example: asbestos, vinyl chloride, chromium.

Exercise 2

In relation to substances used at work:

-Explain the meaning of the term toxic.
-Describe, using an example in EACH case, the difference between acute and chronic health
effects.

Answer 2

• Toxic: is a substance that has an adverse (poisonous) effect on a target organ or body
system. The substance causes its adverse effect when taken in relatively small dose.
The effect is either acute or chronic.

• Acute health effect: an adverse effect resulting from a single or short-term exposure
and producing an immediate or rapid effect.
Examples: corrosive action, narcosis and primary irritation.

• Chronic health effect: is an adverse health effect resulting from prolonged or repeated
exposures with a gradual or latent and often irreversible effect that may often go
unrecognized for a number of years.
Example: Cancer, sensitization dermatitis & damage to body organs.

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NEBOSH National General Certificate

Control Measures

Exercise 1

While dealing with any question asking for "Control Measures": always remember the
hierarchy of control measures:

Answer 1

• Elimination
• Substitution.
• Engineering controls (including work permit)
• Administrative Controls

o Reduced time of exposure.
o Training.
o Safety signs.
o First aid and emergency measures.
o Health surveillance.
o Use of PPE.

Exercise 2

The key items as how to deal with any hazard question:

Answer 2

According to the work activity performed:
• If the work is outdoor, consider:

Weather hazards as heat, cold, rain.
Bite by animals, snakes, insects, etc.

• If work is at the roadside, consider:
Collision by vehicles.

• If the work is dealing with grass or other plants consider: insect bites.
• If the work is dealing with water (as fro cleaning canals), consider:

Drowning hazard.
Trench foot hazard.
Leptospirosis (Weil's disease)

• If the work is requiring manual handling (as lifting painting cans, cleaning material, etc,
etc.) consider: manual handling hazard.

• If doing tasks as painting, floor cleaning, keyboard use, assembly work, etc., consider:
Ergonomic hazard.

• If an equipment is used, consider: Equipment hazards (mechanical & non mechanical)
• If the equipment used is petrol driven, consider:

Carbon monoxide hazards.
Nitrogen oxides hazards.

• If the equipment used is electrically operated, consider: electrical hazards.
• If a chemical is used (as a solvent), consider:

Health hazards as dermatitis, asthma, effects on central nervous
system, dizziness, etc.
Safety hazards as fires, explosives, etc.

• If the work is at height, consider:
Falling hazard of individuals.
Falling hazard of materials.

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NEBOSH National General Certificate
• If there is a risk of infection (as on dealing with refuse, sludge, etc.)

consider: biological hazards .
• If working in a confined space, consider:

Atmospheric hazards (as lack of oxygen or toxic frames).
Entrapment.
Biological hazards.
Equipment hazards.
Manual handling hazards .

• On doing repainting, consider:
Hazards due to removal of old paint: as lead exposure.
Hazards of painting (as health hazards, fire, explosion, manual handling,
ergonomic and weather hazards).

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