Question

· A traffic policeman always wear a mask on his nose. Why?
· Why do mountaineers carry oxygen cylinders with them?
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Answer 1

Answer:

.The traffic policemen wear mask with charcoal lining because charcoal has activated carbon which absorbs most of the air pollutants, dust pollen, etc. This saves the policemen from their harmful effects.

.

Mountaineers carry an oxygen cylinder along with them. It is because when they climb mountains, as altitude increases, the amount of oxygen level in the atmospheric air decreases as trees are not found at higher altitudes. As a result, mountaineers suffer from dizziness. It can also lead to hypoxia.

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