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Q: Which of the following statements is INCORRECT?
  • A. Welding operations may release nitrogen oxide.
  • B. Thermal power houses are the main contributors to SO₂ emissions.
  • C. Municipal drainage systems emit H2S gas.
  • D. Incomplete combustion of carbonaceous fuels releases carbon dioxide as the major pollutant.
Correct Answer: Option D - Welding operations can produce the following emissions–Carbon monoxide, nitrogen oxides, ozone, dusts and metallic fumes. • Thermal power houses are the main contribution to SO₂ emissions. • Municipal drainage systems emit H₂S gas. • Municipal drainage system means the system operated and maintained by the city for the purpose of transporting, disposing, treating using or discharging drainage etc.
D. Welding operations can produce the following emissions–Carbon monoxide, nitrogen oxides, ozone, dusts and metallic fumes. • Thermal power houses are the main contribution to SO₂ emissions. • Municipal drainage systems emit H₂S gas. • Municipal drainage system means the system operated and maintained by the city for the purpose of transporting, disposing, treating using or discharging drainage etc.

Explanations:

Welding operations can produce the following emissions–Carbon monoxide, nitrogen oxides, ozone, dusts and metallic fumes. • Thermal power houses are the main contribution to SO₂ emissions. • Municipal drainage systems emit H₂S gas. • Municipal drainage system means the system operated and maintained by the city for the purpose of transporting, disposing, treating using or discharging drainage etc.