Carbon Monoxide
The air used in firefighters' tanks is typically compressed breathing air. It is usually a mixture of oxygen, nitrogen, and trace amounts of other gases. This air is supplied to firefighters to ensure their safety and enable them to breathe in hazardous environments.
There is no standard collective noun for firefighters, in which case a noun that suits the situation can be used; for example a crew of firefighters, a squadron of firefighters, a team of firefighters, etc.
Materials used by firefighter are chemical products.
The foam is not gas, but chemicals that prevent the fuel source in a fire from receiving the oxygen needed to sustain a fire.
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They are often used as cropsprayers and as firefighters.
No, the word 'firefighter' is a singular, common, compound noun; a word for a person.A collective noun is a word used to group people or things taken together as one whole.Some collective nouns that might be used for the noun firefighters are a company of firefighters, acrew of firefighters, a squad of firefighters, etc.
fire truck
Yes, helicopters can carry firefighters to forest fires. They are often used to transport firefighters to remote or inaccessible areas where the fire is burning. Helicopters can also be used to drop water or fire retardant on the fire to help suppress it.
Firefighters must pass rigorous testing.
The possessive form for the plural noun firefighters is firefighters'.
In many cases suburban firefighters will make larger salaries then big city firefighters for several reason.