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Process Equipment and Plant Design

Process Equipment and Plant Design
Needle valves are generally not used for

Very accurate flow control
Very large diameter pipes
Smaller sizes of pipe
High pressure throttling service

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Process Equipment and Plant Design
Frame thickness in the plate and frame filter press is normally in the range of __________ inches.

0.25 to 8
1 to 5
1 to 12
0.25 to 4

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Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

(D₂² - D₁²)/D₂²
(D₂² - D₁²)/D₁²
D₂ - D₁
None of these

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

All of these
Cross-partition rings
Lessig rings
Raschig rings

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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.

43962
44058
43895
44183

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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
20
10
10

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