A. 0.05 to 0.15
B. 0.25 to 0.50
C. 0.5 to 0.8
D. 0.8 to 0.9
Related Mcqs:
- In a rotary drier, the average retention time of solid is (where Z = length of the drier, metres ρ = apparent solid density, kg/m3 L = flow rate of dry solids, kg/see. m2 drier crosssection H = hold up of solid.) ?
A. Z.H.ρ/L
B. L/Z.H.ρ
C. H.ρ/L
D. Z.H/ρL - Height of the flights in the rotary drier is in the range of___________________?
A. 0.08 to 0.12 d
B. 0.02 to 0.05 d
C. 0.2 to 0.5 d
D. 0.5 to 0.6 d - Slope of counter-current flow rotary drier is in the range of ____________ meter/metre?
A. 0 to 0.08
B. 0 to 0.8
C. 0 to 1.5
D. 0 to 2.2 - Cylindrical shell thickness of rotary drier is generally _______________ mm?
A. 2-3
B. 18-22
C. 6-8
D. 12-15 - Length to diameter ratio of most rotary driers is in the range of____________________?
A. 1 to 2
B. 4 to 10
C. 10 to 20
D. 20 to 30 - Pressure differential maintained across a continuous rotary vacuum filter is in the range of _______________ mm Hg column?
A. 50 to 100
B. 100 to 150
C. 250 to 500
D. 600 to 700 - The retention time of material in a rotary dryer depends upon its ______________________?
A. rpm
B. Slope & length
C. Flights arrangement
D. All A., B. and C. - The operating pressure drop range in a bag filter is about ______________ mm water gauge?
A. 50-150
B. 5-10
C. 500-1500
D. 1500-2500 - Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as_________________?
A. Δp = G
B. Δp = G0.5
C. Δp = G2
D. Δp = 1/G0.6 - Speed of the drum of the rotary vacuum filter normally ranges from _____________ rpm?
A. 0.1 to 2
B. 5 to 7
C. 3 to 8
D. 8 to 15
