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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for fully open globe value may be around

300
10
25
75

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Process Equipment and Plant Design
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

Molal flow rate of vapour
Pressure and temperature
Vapour molecular weight
All of these

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Process Equipment and Plant Design
A cylindrical storage tank can have a self supported conical roof,

Irrespective of its diameter
If its diameter is more than 50 meters
If its diameter is less than 15-20metres
If the thickness of the roof is more than that of the cylindrical shell

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Process Equipment and Plant Design
Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

1/2
8
2
4

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Process Equipment and Plant Design
Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

D = 3√t
D = 1.5 t
D = 1.6 √t
D = 1.1 t

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Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Flat plate
Hemispherical
Torispherical
Ellipsoidal

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