engineering recuitment NCL Assistant Foreman (Trainee) Mock Test 2024 Refrigeration and Air Conditioning Refrigerants Designation of Refrigerants
As per ANSI/ASHRAE 34-2019, Designation and Safety Classification of Refrigerants nomenclature, the ‘R’ number for Ammonia is ______.
1
702
2
718
3
744
4
717