PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²

Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²

Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen

Density of the gas and inversely as viscosity of the gas

Density of the gas, but is independent of the viscosity of the gas

Viscosity of the gas and inversely as density of the gas

None of these

Counter-current heat transfer systems

Co-current heat transfer systems

Cases where temperature difference between the shell and the tubes is more (>50°C)

Heat transfer between corrosive fluids

Withstand higher pressure for a given metallic shell thickness

Be fabricated very easily

Be supported very easily

Be designed without wind load considerations

Neither A nor B

Has greater structural strength

Both A & B

Is easy to fabricate

Ideal trays required to the number of real trays required

Overall gas transfer units to the number of ideal trays required

Real trays required to the number of ideal trays required

None of these

0.95 d

0.1 to 0.2 d

0.65 to 0.85 d

0.3 to 0.5 d

15-20

10-12.5

2.5-3.0

5-7.5

Thrice

Half

Five times

Twice

Allowable vapour velocity

Length of straight rectangular weir on cross-flow tray

Static submergence

Number of theorectical plates