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Process Equipment and Plant Design

Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.

44058
43962
43895
44183

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Process Equipment and Plant Design
It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than

0.95
0.55
0.8
0.99

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Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

38
16
19
28

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Process Equipment and Plant Design
The main purpose of providing stepping on the trays is to

Improve the flow condition
Facilitate handling of large flow rate of liquid
Decrease the pressure drop
Increase the residence time

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Process Equipment and Plant Design
Poisson's ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson's ratio for structural and pressure vessel steel may be taken as

0.01
0.95
0.3
0.75

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Process Equipment and Plant Design
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.

Working
Allowable
None of these
Damaging

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