A. 0 to 0.08
B. 0 to 0.8
C. 0 to 1.5
D. 0 to 2.2
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 - Hold up of material in a operating rotary drier is in the range of___________________?
A. 0.05 to 0.15
B. 0.25 to 0.50
C. 0.5 to 0.8
D. 0.8 to 0.9 - Cylindrical shell thickness of rotary drier is generally _______________ mm?
A. 2-3
B. 18-22
C. 6-8
D. 12-15 - 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 - The practical representative values of HETP for a number of commercial operations lies within a range of ______________ metre?
A. 0.1-0.2
B. 0.2-0.5
C. 0.4-0.9
D. 1.2-1.5 - The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?
A. S1/S2
B. S1.S2
C. S2/S1
D. 1/S1.S2 - 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 operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _________________ mm of water column per metre height of packing?
A. 1-5
B. 20-40
C. 100-150
D. 1000-1500
