Only once ventilation has been achieved is the firefighters attempt to enter a structure when backdraft conditions are present.
<h3>What is the meant by ventilation?</h3>
In the workplace, ventilation is used to reduce exposure to airborne contaminants. It is widely employed to purge the air of contaminants like fumes, dust, and vapours in order to produce a secure and healthful working environment.
The alveoli are responsible for converting carbon dioxide from the atmosphere into oxygen.
Thus, Only once ventilation has been achieved is the firefighters attempt to enter a structure.
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Answer:
He was not able to preach Islam in Mecca, but he was able to do so in Medina.
Answer:
It had almost exclusive control of the world's supply of nickel and used to make nickel products
Explanation:
INCO (International Nickel Mining Company of Canada) was the major producer of nickel during the 20th century. It was purchased by the Brazilian company Vale in 2006. It is now based in Toronto and handles Vale's mining operations worldwide, it now produces platinum, rhodium, ruthenium, gold and silver. Prior to 2006 it was second largest producer of nickel and was also as member of Dow Jones Industrial Average.
Answer:
I think the answer is C
Explanation:
I learned about this but not 100% sure if I'm right
