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Process Equipment and Plant Design

Process Equipment and Plant Design
Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as 'd' will be

√d
√(2d)
D
√(2πd)

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Process Equipment and Plant Design
Optimum economic pipe diameter for fluid flow is determined by the

Viscosity of the fluid
Total cost considerations (pumping cost plus fixed cost of the pipe)
Density of the fluid
None of these

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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

Bending
Deformation
Elongation
Shear

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Process Equipment and Plant Design
In a heat exchanger, shell side fluid velocity can be changed by changing the tube

Both A & B
Neither A nor B
Layout
Pitch

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Process Equipment and Plant Design
In a thin cylindrical shell, the hoop stress is __________ stress.

Circumferential tensile
Radial
Compressive
Longitudinal

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Process Equipment and Plant Design
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

1.5 to 2
0.5 to 1
1 to 1.5
2 to 2.5

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