A. Density of the gas, but is independent of the viscosity of the gas
B. Density of the gas and inversely as viscosity of the gas
C. Viscosity of the gas and inversely as density of the gas
D. None of these
Related Mcqs:
- 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 - In the design of a bag filter, the gas temperature is an important consideration, as it affects the___________________?
A. Gas density
B. Gas viscosity
C. Fibre selection
D. All A., B. & C. - Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?
A. η = 17 – 61.1 log μ
B. η = 24.6 (Δp/μ)
C. η = 1.66 – 0.25 log μ
D. η = 0.25 log μ – 1.67 - 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 - With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter___________________?
A. Increases
B. Decreases
C. Remain unaffected
D. None of these - The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about ______________ times the design pressure?
A. 1.5 to 2
B. 3 to 4
C. 4 to 5
D. > 5 - Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than ______________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop?
A. 25
B. 50
C. 75
D. 150 - In packed absorption tower, onset of flooding usually occurs at a pressure drop of about ______________ mm of water column per metre height of packing?
A. 25-50
B. 50-75
C. 200-250
D. 750-1000 - 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 - For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is_________________?
A. d1/(d1 + d2)
B. d2/(d1 + d2)
C. (d1 + d2)/d1
D. (d1 + d2)/d2
