Smell of Mercaptan will allow us to detect the Compressed natural gas. The smell is similar to the LPG used in our homes for cooking.
Explanation:
Compressed natural gas is heavier than air and tends to settle down near the ground. In case there is a leakage of CNG the air near the ground surface will be displaced and get filled with CNG. This may result in aphyxiation i.e. lack of oxygen in enclosed places.
CNG is odorless and cannot be detected by smell. In order to make the detection possible, a small amount of mercaptan is added to CNG so that its smell is easily detected.
This is true. Asphyxiation is a hazard caused by compressed natural gas.
A person would start to experience this after they have stayed in a concentrated area and inhaled a good amount of the gas. In such a situation, the person has less oxygen and what he keeps inhaling is carbon monoxide.
It could be a cause of fatigue, chest pain and even death if nothing is done about it.
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