Which one of the following air cleaning devices can be used for the removal of gases and vapour?
a. Dry filters
b. Air washers
c. Electronic air cleaners
d. Charcoal absorbers
e. Air sterilizers
Answer: D
Which one of the following air cleaning devices can be used for the removal of gases and vapour?
a. Dry filters
b. Air washers
c. Electronic air cleaners
d. Charcoal absorbers
e. Air sterilizers
Answer: D