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Process Equipment and Plant Design

Process Equipment and Plant Design
Which of the following is the best tube material from thermal conductivity point of view alone?

Carbon steel
Stainless steel
Copper
Aluminium

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering run) would be around

200
5
350
60

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

30
> 10
> 20
< 10

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

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

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Process Equipment and Plant Design
In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by

(p² - πd²/4)/πd
(4p² - πd²/4)/πd
4(0.86p² - πd²/4)/πd
4(0.86p² - πd²)/πd

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Process Equipment and Plant Design
In inclined long tube vertical evaporators, the tubes are inclined at an angle of

15°
60°
45°
90°

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