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Process Equipment and Plant Design

Process Equipment and Plant Design
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to

25 cms
40% of the I.D. of the shell
I.D. of the shell
5 cms

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Process Equipment and Plant Design
The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.

3.5 to 7.0
1.25 to 3.125
0.3 to 0.8
44055

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Process Equipment and Plant Design
Pressure drop due to pipe fittings can be estimated by the equation, ΔP/p = 4f.Le/D.V2/2gc, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Le/D (dimensionless) for 45° elbow and 180° close return bends would be respectively around

5 and 10
180 and 300
45 and 75
300 and 500

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Process Equipment and Plant Design
A 'rupture disc' is provided in chemical equipments as an accessory meant for

Relieving excess pressure
Enhancing mixing rate
Avoiding vortex formation
Creating turbulence

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Process Equipment and Plant Design
The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.

One fourth
Three fourth
Equal to
Half

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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.

8
4
2
1/2

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