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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 = 1.5 t
D = 1.1 t
D = 1.6 √t
D = 3√t

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Process Equipment and Plant Design
Thickness of the frame of a plate and frame filter as compared to that of plates is

Less
More
Either A or B
Same

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Process Equipment and Plant Design
Cylinderical shell thickness of rotary drier is generally __________ mm.

44180
43864
43990
18-22

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Process Equipment and Plant Design
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

0.35-0.75
0.1-0.2
0.55-0.85
0.4-0.6

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Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)2/3
(1.2)3/2
(1.2)5/3
(1.2)3/5

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Process Equipment and Plant Design
Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle?

Helical type baffle
Flat plate extending across the wall
Segmental baffle
Disk type baffle

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