Process Equipment and Plant Design
In a bag filter, the pressure drop increases directly as the

Density of the gas, but is independent of the viscosity of the gas
None of these
Density of the gas and inversely as viscosity of the gas
Viscosity of the gas and inversely as density of the gas

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Process Equipment and Plant Design
In a vertical short tube evaporator (Calendria type), the

All of these
Liquor is inside the tube while the steam is outside the tube
Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used
Area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube

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