GAT Subject
Engineering
Computer Science Civil Engineering Chemical Engineering Agricultural Engineering Mechanical Engineering Electronics and Communication
6. | Protective gas used in the annealing furnace for steel coil comprises of___? | |
A. | 95% N2 + 5% H2 | |
B. | 5% H2 + 9% N2 | |
C. | 100% CO | |
D. | 100% H2 | |