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Process Equipment and Plant Design

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 = 3√t
D = 1.1 t
D = 1.6 √t
D = 1.5 t

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Process Equipment and Plant Design
Which of the following is used to set the diameter of the distillation column?

Length of straight rectangular weir on cross-flow tray
Allowable vapour velocity
Static submergence
Number of theorectical plates

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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.

28
16
38
19

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Process Equipment and Plant Design
Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as

Δp = G0.5
Δp = 1/G0.6
Δp = G2
Δp = G

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Process Equipment and Plant Design
A rivetted joint does not fail by __________ of rivets.

Tearing of the plate across a row
None of these
Shearing
Tearing

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Process Equipment and Plant Design
For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter ).

1/D²
1/D⁵
1/D
D²

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