Air used for ventilating purposes in an office building should be kept within 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 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