Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

Process Equipment and Plant Design
Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

HG = 1.004G0.37

1.004G0.8

HG = 0.0176G0.37

0.0176G1.37

HG = 1.004G0.37

1.004G0.8

HG = 0.0176G0.37

0.0176G1.37

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Process Equipment and Plant Design
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes

Are less prone to fouling

Are easier to clean

None of these

Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less

Are less prone to fouling

Are easier to clean

None of these

Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.5 to 3

1.3 to 2

1.6 to 2

2.5

1.5 to 3

1.3 to 2

1.6 to 2

2.5

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Process Equipment and Plant Design
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.

100-150

43835

1000-1500

20-40

100-150

43835

1000-1500

20-40

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Process Equipment and Plant Design
__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Split flow

Cascade

Cross flow

Radial flow

Split flow

Cascade

Cross flow

Radial flow

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Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.

High specific heat

Low dirt factor

Low corrosiveness

Low viscosity

High specific heat

Low dirt factor

Low corrosiveness

Low viscosity

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Process Equipment and Plant Design

Process Equipment and Plant Design In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes

Process Equipment and Plant Design In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

Process Equipment and Plant Design 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.

Process Equipment and Plant Design __________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Process Equipment and Plant Design __________ of water makes it a widely used coolant in heat exchangers.

Process Equipment and Plant Design
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes

Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

Process Equipment and Plant Design
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.

Process Equipment and Plant Design
__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.