A. 20% phenol
B. High efficiency particle arrestors
C. 40% formaldehyde vapour
D. Chlorine gas
Correct Answer: 40% formaldehyde vapour ✔
Last Updated: February 07, 2020
A. 20% phenol
B. High efficiency particle arrestors
C. 40% formaldehyde vapour
D. Chlorine gas
Correct Answer: 40% formaldehyde vapour ✔
Last Updated: February 07, 2020