The operating pressure drop range in a bag filter is about ______________ mm water gauge?

Related Mcqs:

1. In a bag filter, the pressure drop increases directly as the___________________?

   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

2. 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

3. 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

4. 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.

5. 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

6. Tube wall thickness depends on the corrosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than _____________ mm outside diameter is generally not recommended for fouling fluids ?

   A. 16
   B. 19
   C. 28
   D. 38

7. 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

8. 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

9. Frame thickness in the plate and frame filter press is normally in the range of ______________ inches?

   A. 0.25 to 4
   B. 0.25 to 8
   C. 1 to 5
   D. 1 to 12

10. For identical operating conditions, the pressure drop over _______________ tray is the highest out of the following?

    A. Sieve
    B. Valve
    C. Counter flow
    D. Bubble cap