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Process Equipment and Plant Design

Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

Not greater than
Both B and C
Not less than one fifth of
More than

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Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

Equal to
More than
Less than
Either B or C; depends on maximum permissible internal pressure

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

10 to 20
1.5 to 2.5
0.01 to 1
5 to 10

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Process Equipment and Plant Design
Cooling water fouling factors vary in the range of 0.001 to 0.003

(kcal/hr. m. °C)⁻¹
(BTU/hr.ft² . °F)⁻¹
(W/m².°K)⁻¹
(kcal/hr.m² .°C)⁻¹

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Process Equipment and Plant Design
Length to diameter ratio of most rotary driers is in the range of

20 to 30
4 to 10
10 to 20
1 to 2

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Process Equipment and Plant Design
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

1/50th
1/20th
1/10th
1/30th

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