Duct liners
a) eliminate corrosion
b) reduce the noise level of air flowing in the duct system
c) reduce fire hazard
d) increase erosion to the duct
e) increase the pressure
Answer: B
Duct liners
a) eliminate corrosion
b) reduce the noise level of air flowing in the duct system
c) reduce fire hazard
d) increase erosion to the duct
e) increase the pressure
Answer: B