OSH DRO1113 Fire Hazards & Control

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Questions and Answers

What are the three essential elements required for fire to occur?

Fuel, heat, and nitrogen

Fuel, ignition, and heat (correct)

Heat, oxygen, and carbon

Oxygen, fuel, and water

Which of the following is NOT a common source of fuel in a workplace?

Paint

Wood

Cardboard

Static electricity (correct)

What method of fire extinction involves using water?

Starving

Chemical reaction

Smothering

Cooling (correct)

Which of the following substances can release oxygen during combustion?

Nitrates Signup and view all the answers

In the fire hazards classification, which class involves solid materials?

Class A Signup and view all the answers

What is the primary role of ventilation in fire scenarios?

To enhance oxygen supply Signup and view all the answers

Which of these is NOT a source of ignition in a workplace?

Wood Signup and view all the answers

What does smothering as a method of fire extinction involve?

Limiting oxygen supply Signup and view all the answers

Which type of Class B fire involves a liquid that is soluble in water?

Methanol Signup and view all the answers

What is the primary hazard associated with smoke during a fire in a building?

Smoke spreads horizontally and fills spaces rapidly. Signup and view all the answers

What is not a principle of heat transmission in fire spread?

Sublimation Signup and view all the answers

Which Class of fire involves electrical equipment or circuitry?

Class E Signup and view all the answers

What should be avoided to minimize the risks during a fire?

Ignition sources Signup and view all the answers

Which action is essential for ensuring safe escape routes in case of fire?

Improving fire protection on existing routes Signup and view all the answers

What is the consequence of a fire that does not get addressed?

Environmental damage Signup and view all the answers

What should be done to control the release of dangerous substances in a workplace?

Prevent the formation of explosive atmospheres Signup and view all the answers

What is the maximum recommended escape time for individuals to reach a safe place during a fire?

2 minutes Signup and view all the answers

Which of the following should NOT be included in a workplace fire emergency plan?

Advertising upcoming events Signup and view all the answers

What is one reason additional escape routes may need to be provided during a fire emergency?

If reaction times are too long Signup and view all the answers

What design considerations should be taken into account for a sprinkler system in a building?

Fire hazard's characteristics Signup and view all the answers

Which of the following actions is part of the basic fire routine procedures?

Stopping machinery and plant Signup and view all the answers

Which component is essential for effective fire exit signage?

Directional arrows Signup and view all the answers

What is a potential advantage of using a sprinkler system in fire management?

It automatically activates without human intervention Signup and view all the answers

During a fire drill, what should be checked to ensure adequate emergency preparedness?

Duration to evacuate each floor Signup and view all the answers

What is essential for fire detection systems in the workplace?

They should be audible throughout the workplace. Signup and view all the answers

Which of the following should fire plans in the workplace include?

Information on escape routes and places of safety. Signup and view all the answers

What is a requirement for doors in high-risk areas regarding escape?

They may need to open in the direction of travel. Signup and view all the answers

How should escape routes be designed in case of fire?

They should lead in different directions to places of safety. Signup and view all the answers

What should be ensured about the doors on escape routes?

They should be easy to open without keys from the inside. Signup and view all the answers

What is a crucial feature of escape routes during a fire emergency?

They must lead directly to the open air without returning to the area of fire. Signup and view all the answers

What type of lighting is appropriate for escape routes?

Escape routes should be well-lit with reliable sources. Signup and view all the answers

Which type of door is NOT suitable as an escape door?

Revolving doors without hinged segments. Signup and view all the answers

Study Notes

Fire Hazards & Control

Key learning outcomes include identifying fire hazards, evaluating fire risks, understanding fire prevention principles, and knowing appropriate alarm and firefighting equipment for workplaces.

Fire Triangle

Fire requires three elements to ignite: ignition source, fuel, and oxygen.
Removal of any element can extinguish fire.

Sources of Ignition

Naked flames like candles or matches.
Sparks, either external (from outside sources) or internal (from equipment).
Hot surfaces that can ignite materials nearby.
Static electricity from friction or movements.

Sources of Fuel

Common solid fuels include wood, paper, cardboard, and rubber.
Flammable liquids consist of paints, varnishes, thinners, adhesives, and petrol.
Flammable gases include LPG, acetylene, and hydrogen.

Role of Oxygen

Oxygen is abundant in the air; conditions can be influenced by wind or ventilation, increasing fire intensity.
Certain chemicals release oxygen during combustion, negating the need for external air.

Methods of Extinction

Cooling involves using water to lower fire temperature.
Smothering limits available oxygen through foam or fire blankets.
Starving focuses on reducing or eliminating fuel sources.
Chemical methods interrupt the combustion chain reaction.

Fire Classification

Class A: Solids (e.g., wood, paper).
Class B: Liquids (e.g., petrol).
- B1: Water-soluble (e.g., methanol).
- B2: Not water-soluble (e.g., oil).
Class C: Gases (e.g., propane).
Class D: Metals (e.g., aluminum).
Class E: Electrical equipment.
Class F: High-temperature cooking oils.

Principles of Heat Transmission & Fire Spread

Fire spreads heat through convection, conduction, radiation, and direct burning.
Smoke spreads horizontally, can fill spaces, and moves through openings rapidly, posing risks.

Consequences of Fire

Fatalities due to smoke inhalation, burns, or combined effects.
Personal injuries and damage to buildings, ecosystems, and transportation.
Economic impacts including business losses and job cuts.

Control Measures for Fire Hazards

Minimize dangerous substances and control their release.
Prevent ignition sources and manage incompatible materials.
Use ventilation for collecting and safely removing hazardous materials.

Emergency Escape Routes

Essential for quick evacuation; routes must be kept clear and marked.
Dual escape routes should lead in different directions to safety.
Doors should open easily and not be obstructed, with adequate lighting.

Fire Detection & Warning Systems

Fire alarms and detectors should be installed in strategic locations.
Systems must provide audible warnings and connect to emergency services.

Fire Plans

Fire plans must be visibly posted, detailing escape routes, fire safety signs, and emergency exits.
Include locations of alarms, emergency lights, and PPE.

Escape Route Requirements

Routes must allow scanning for hazards while escaping and accommodate high foot traffic.
Doors leading from high-risk areas or potentially crowded spaces should open outward.

Fire Drill Considerations

Evacuation time should not exceed 2-3 minutes; regular drills assess efficiency.
Reaction time must be brief; additional escape routes may be necessary if prolonged.

Fixed Fire Fighting Equipment

Sprinkler systems are effective for fire control, designed for specific fire hazards.
Installation must consider building occupancy and potential fire load.

Workplace Fire Emergency Plans

Plans must outline actions upon discovering a fire, evacuation procedures, and contacting emergency services.
Include the method for raising an alarm and designated assembly points for personnel.

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Description

This quiz covers Topic 11 of the OSH DRO1113 course, focusing on fire hazards and control in the workplace. You will learn to identify fire risks, understand fire prevention principles, and recognize appropriate firefighting equipment. Test your knowledge of fire safety measures and emergency escape plans.