engineering recuitment ONGC AEE Mechanical Mock Test 2025 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
5
Trichloro difluoro methane