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Process Equipment and Plant Design

Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

45.5
5.5
30.5
12.5

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Process Equipment and Plant Design
The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

1.2-1.5
0.1-0.2
0.2-0.5
0.4-0.9

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Process Equipment and Plant Design
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

34
6
18
12

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Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Aa = 1.5 Sa
Aa = Sa
1.2 Aa = 1.2 Sa
Sa = 1.5 Aa

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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.

19
28
16
38

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Process Equipment and Plant Design
The ratio of lateral strain to linear strain is termed as the

Modulus of elasticity
Bulk modulus
Poisson's ratio
Shear modulus

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