What is the full form of CNG, in controlling vehicular air pollution?

Question

Question

This question was previously asked in

RRB Pharmacist Exam Paper 2019

Answer 1

Compressed Natural Gas

Explanation:

Compressed Natural Gas (CNG): CNG is a type of natural gas that has been compressed to less than 1% of its volume at standard atmospheric pressure. It is used as a cleaner alternative to gasoline, diesel fuel, and propane/LPG for use in vehicles. It is made by compressing natural gas (which is mostly composed of methane) to a high pressure, typically between 20-25 MPa (about 200-250 bar or 2900-3600 psi).
Environmental Impact: Using CNG as a fuel can significantly reduce the emissions of harmful pollutants, including carbon monoxide (CO), particulate matter (PM), and nitrogen oxides (NOx), which are commonly associated with traditional internal combustion engines burning gasoline or diesel.

Explanation of Other Options:

Combined Natural Gas

This term is not commonly used, and it does not describe the process relevant to vehicular fuel or emission control.

Common Natural Gas

While natural gas is commonly used, this term does not describe the specific form that is used in vehicular applications for pollution control.

Combined Nitrogen Gas

This term is incorrect as it does not relate to natural gas or its use in vehicles. Nitrogen gas is a different element and has different uses.

Conclusion:

Compressed Natural Gas (CNG) is the correct term associated with controlling vehicular air pollution. It is a cleaner fuel alternative that helps reduce harmful emissions from vehicles.