Commercial packed scrubbers are normally designed for a pressure drop range of ______________ mm water column per metre of packed height?
		A. 4-8
B. 17-34
C. 52-68
D. 88-105
		A. 4-8
B. 17-34
C. 52-68
D. 88-105
		A. More
B. Less
C. Same
D. More or less depending upon the pressure & temperature inside the vessel and the nature of
the fluid contained therein
		A. Zero and infinity
B. Zero and one
C. Minimum and infinity
D. None of these
		A. ζh = 2 ζL
B. ζh = ζL
C. ζh = ζL/2
D. No relation exists
		A. 3-5
B. 5-11
C. 8-15
D. 12-18
		A. Hydrostatic head is required for refluxing the condensate
B. Only the function of condensation is to be carried out
C. Sub-cooling of condensate is desired
D. Both the functions of condensation & sub cooling are carried out in a single unit
		A. Providing a higher skirt clearance or a higher weir
B. Decreasing the number of rows of caps through which the liquid flows or by decreasing the
velocity of liquid flow past the caps or by reducing the distance along the tray through which
the liquid must flow
C. Using split flow, radial flow or cascade flow for column diameter large than 4 ft
D. All A., B. and C.