A.increasing the cross-sectional area of the precipitator
B.increasing its length in the direction of gas flow
C.both a and b
D.neither a nor b
A.ionosphere
B.troposphere
C.stratosphere
D.exosphere
A.reduction
B.oxidation
C.dehydration
D.alkalinization
A.Nitrogen Oxygen Carbon dioxide Argon
B.Argon Carbon dioxide Oxygen Nitrogen
C.Carbon dioxide Argon Oxygen Nitrogen
D.Nitrogen Oxygen Argon Carbon dioxide
A.the size and cost of a fabric filter is correspondingly increased
B.the size and cost of a fabric fulter is correspondingly decreased
C.the size and cost of a fabric filter remains unaffected
A.15 ppm
B.10 ppm
C.5 ppm
D.20 ppm
A.the gas viscosity
B.the gas density
C.the selection of fabric
D.all of the above
A.0.2 to 0.5 in. H2O g
B.2 to 6 in. H2O g
C.8 to 60 in. H2O g
D.0.01 to 0.1 in. H2O g
A.high conductivity material is more easily collected
B.low conductivity material is more easily collected
C.electrical conductivity of material is not an important factor
D.none of the above
A.N2O4
B.N2O5
C.N2O
D.N2O3
