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.

Process Equipment and Plant Design
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.

75

150

50

25

75

150

50

25

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Process Equipment and Plant Design
In case of a continuous distillation column, increase in reflux ratio may result in the

Greater cost for the condenser coolant

Greater cost for the reboiler heat supply

All of these

Lower fixed charges for the column

Greater cost for the condenser coolant

Greater cost for the reboiler heat supply

All of these

Lower fixed charges for the column

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Process Equipment and Plant Design
A cylinderical pressure vessel of volume 6 πm³ has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm² and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to

10 mm

8 mm

5 mm

6 mm

10 mm

8 mm

5 mm

6 mm

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Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

12.5

45.5

5.5

30.5

12.5

45.5

5.5

30.5

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Decrease in gas solubility for absorbers

An increase in liquid viscosity

All of these

An increase in relatived volatility for rectification columns

Decrease in gas solubility for absorbers

An increase in liquid viscosity

All of these

An increase in relatived volatility for rectification columns

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

5 to 10

0.01 to 1

10 to 20

1.5 to 2.5

5 to 10

0.01 to 1

10 to 20

1.5 to 2.5

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Process Equipment and Plant Design

Process Equipment and Plant Design 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.

Process Equipment and Plant Design In case of a continuous distillation column, increase in reflux ratio may result in the

Process Equipment and Plant Design Maximum acceptable total liquid gradient over a tray is about __________ mm.

Process Equipment and Plant Design An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Process Equipment and Plant Design Rotary driers are most economically designed for the number of heat transfer units (HTU) from

Process Equipment and Plant Design
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.

Process Equipment and Plant Design
In case of a continuous distillation column, increase in reflux ratio may result in the

Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from