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Process Equipment and Plant Design

Process Equipment and Plant Design
The LMTD correction factor (FT) is applied in __________ heat exchangers.

All of these
All multipass
1-1 cocurrent
Double pipe

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Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

55
20
35
5

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Process Equipment and Plant Design
A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is

20
10
10
20

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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 = 1.1 t
D = 1.5 t
D = 1.6 √t
D = 3√t

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Process Equipment and Plant Design
Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.

17-34
52-68
43929
88-105

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Process Equipment and Plant Design
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

Plain carbon steel and cast iron parts are used
Material of construction is high alloy steel
Wall thickness is > 30 mm
Both B & C

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