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Process Equipment and Plant Design

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
(kcal/hr.m² .°C)⁻¹
(W/m².°K)⁻¹

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Process Equipment and Plant Design
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

Material of construction is high alloy steel
Plain carbon steel and cast iron parts are used
Wall thickness is > 30 mm
Both B & C

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

All of these
An increase in liquid viscosity
An increase in relatived volatility for rectification columns
Decrease in gas solubility for absorbers

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Process Equipment and Plant Design
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

Same
Either A or B; no generalisation can be made
More
Less

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

15°
90°
45°
60°

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Process Equipment and Plant Design
For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

0.9
(0.8)0.5
1
0.8

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