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Process Equipment and Plant Design

Process Equipment and Plant Design
Length to diameter ratio of most rotary driers is in the range of

20 to 30
1 to 2
4 to 10
10 to 20

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Process Equipment and Plant Design
__________ closure is the weakest enclosure for cylindrical vessels.

Hemispherical
Conical or flat plate
Elliptical
Torispherical

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Process Equipment and Plant Design
Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing

None of these
Rupture diaphragm
Surge chamber
Dikes

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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
0.0176G1.37
HG = 0.0176G0.37
1.004G0.8

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Process Equipment and Plant Design
Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about __________ kcal/hr.m².°C.

2500
1250
15000
7500

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

2
20.8
∞
1

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