Particle size range in which dust catcher (gravity settling chamber)
works most effectively and efficiently is __________ microns.
(A) < 5
(B) 10 to 25
(C) < 74
(D) > 1000
works most effectively and efficiently is __________ microns.
(A) < 5
(B) 10 to 25
(C) < 74
(D) > 1000