Air used for ventilating purposes in an office building should be kept within a certain range of relative humidity as indicated below:
a. 30 to 50%
b. 30 to 70%
c. 40 to 50%
d. 50 to 60%
e. 10 to 30%
Answer: B
Air used for ventilating purposes in an office building should be kept within a certain range of relative humidity as indicated below:
a. 30 to 50%
b. 30 to 70%
c. 40 to 50%
d. 50 to 60%
e. 10 to 30%
Answer: B