Fire Prevention And Control

2.

This fire extinguisher contains:

Foam
Carbon dioxide
Water
Dry powder

Correct Answer

A. Water

Explanation

The fire extinguisher contains water as one of its components. Water is commonly used in fire extinguishers as it can effectively cool down the fire and extinguish it by removing heat. It is particularly useful for fires involving ordinary combustible materials such as wood, paper, and cloth. Water works by reducing the temperature of the fire below its ignition point, thereby preventing the fire from spreading and causing further damage. However, it is important to note that water should not be used on fires involving flammable liquids or electrical equipment, as it can be ineffective or even dangerous in such situations.

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3.

This extinguisher must not be used on:

Electrical fires
Wood fires
Burning oil
Burning petrol

Correct Answer

A. Electrical fires

Explanation

This extinguisher must not be used on electrical fires because it contains water, which conducts electricity and can cause electric shock or spread the fire.

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1

4.

When using a carbon dioxide fire extinguisher, the nozzle gets:

Very heavy
Very hot
Warm
Very cold

Correct Answer

A. Very cold

Explanation

When using a carbon dioxide fire extinguisher, the nozzle gets very cold. This is because carbon dioxide is stored in the extinguisher as a pressurized gas, and when it is released through the nozzle, it expands rapidly. This expansion causes the gas to cool down significantly, leading to the nozzle becoming very cold to the touch. It is important to handle the nozzle with caution to avoid frostbite or injury due to the extreme cold temperature.

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5.

All fires need heat, fuel and:

Carbon dioxide
Argon
Oxygen
Nitrogen

Correct Answer

A. Oxygen

Explanation

All fires require oxygen as it is a crucial component for the combustion process. Oxygen acts as an oxidizer, combining with the fuel and releasing heat energy. Without oxygen, the fire cannot sustain itself and will eventually extinguish. Carbon dioxide, argon, and nitrogen are all gases that do not support combustion and therefore cannot be the correct answer in this context.

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6.

A large fire has been reported. You have not been trained to use fire extinguishers. You should:

Put away all your tools and then go to the assembly point
Report to the site office and then go home
Go straight to the assembly point
Leave work for the day

Correct Answer

A. Go straight to the assembly point

Explanation

In the event of a large fire and lacking training to use fire extinguishers, it is important to prioritize personal safety and evacuate the area promptly. Going straight to the assembly point ensures that you are away from the immediate danger and can receive further instructions or assistance if needed. This option prioritizes the well-being of individuals and allows for a coordinated response to the fire situation.

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7.

This type of fire extinguisher puts out a fire by:

Starving the fire of oxygen
Cooling the burning material
Increase the oxygen supply
Diluting the oxygen with another gas

Correct Answer

A. Cooling the burning material

Explanation

This type of fire extinguisher puts out a fire by cooling the burning material. When the extinguisher is sprayed onto the fire, it lowers the temperature of the burning material, which helps to slow down or stop the combustion process. By reducing the heat, the fire is deprived of the energy it needs to sustain itself, effectively extinguishing it.

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2

8.

You will need to work in a corridor that is a fire escape route. You must see that:

Your tools and equipment do not block the route
All doors into the corridor are locked
You only use spark-proof tools
You remove all fire escape signs before you start

Correct Answer

A. Your tools and equipment do not block the route

Explanation

In order to work in a corridor that serves as a fire escape route, it is crucial to ensure that tools and equipment do not obstruct the path. This is important to maintain a clear and accessible route for people to evacuate in case of a fire emergency. By keeping the corridor free from any obstructions, the safety of individuals using the fire escape route is prioritized.

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9.

This fire extinguisher contains:

Water
Foam
Dry powder
Carbon dioxide

Correct Answer

A. Carbon dioxide

Explanation

This fire extinguisher contains carbon dioxide because carbon dioxide is commonly used as a fire suppressant. When carbon dioxide is released from the extinguisher, it displaces the oxygen around the fire, effectively smothering it and extinguishing the flames. Carbon dioxide is a suitable choice for certain types of fires, such as electrical fires, as it does not conduct electricity and is non-damaging to electrical equipment.

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10.

A hot works permit lets you:

Work in hot weather
Carry out work that needs warm protective clothing
Carry out work that could start a fire
Light a bonfire

Correct Answer

A. Carry out work that could start a fire

Explanation

A hot works permit allows individuals to carry out work that has the potential to start a fire. This permit is necessary to ensure safety measures are in place to prevent fires and protect both workers and the surrounding environment. By obtaining a hot works permit, individuals are authorized to engage in activities such as welding, cutting, soldering, or any other work that involves the use of open flames or generates sparks or heat that could ignite flammable materials.

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Fire Prevention And Control

How does this type of extinguisher put out fires?

Quiz Preview

This fire extinguisher contains:

This extinguisher must not be used on:

When using a carbon dioxide fire extinguisher, the nozzle gets:

All fires need heat, fuel and:

A large fire has been reported. You have not been trained to use fire extinguishers. You should:

This type of fire extinguisher puts out a fire by:

You will need to work in a corridor that is a fire escape route. You must see that:

This fire extinguisher contains:

A hot works permit lets you: