engineering recuitment NHPC JE & THDC JE 2023 Mock Test Refrigeration and Air Conditioning Refrigerants Designation of Refrigerants
Chemical formula for ‘R22’ refrigerant:
1
Monochloro difluoro methane
2
Trichloro fluoro methane
3
Dichloro monofluoro methane
4
Dichloro difluoro methane