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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

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

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Process Equipment and Plant Design
The dust collection efficiency of a cyclone separator

Decreases with increase in gas flow rate
Is directly proportional to the radius of the dust particle path
None of these
Is inversely proportional to the mass of the dust particle

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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.

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

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Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

250
450
650
750

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Process Equipment and Plant Design
In shell and tube heat exchangers, straight tie rods are used to

None of these
Fix the tubes in position
Hold baffle in space
Account for thermal strain

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Process Equipment and Plant Design
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

Shear
Elongation
Bending
Deformation

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