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Process Equipment and Plant Design

Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of

5000
3000
10000
1000

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Process Equipment and Plant Design
LMTD correction factor is used in heat exchanger design for

Fouling fluids
Multipass shell and tube heat exchanger
Double pipe heat exchanger
Counter flow of hot and cold fluids

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Process Equipment and Plant Design
Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about __________ percent of the total thickness.

10 to 20
1 to 5
30 to 40
40 to 50

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Process Equipment and Plant Design
Baffles may be eliminated for

None of these
High viscosity liquids (> 600 poise)
Large diameter tanks
Low viscosity liquids (< 200 poise)

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Process Equipment and Plant Design
Movement of pipeline caused by thermal expansion is taken care by providing

Change in the shape of pipeline
Changes in its direction
All of these
Expansion joint

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Process Equipment and Plant Design
For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

1
0.8
0.9
(0.8)0.5

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