Chemical Engineering Plant Economics
Optimum economic pipe diameter for fluid is determined by the

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

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Chemical Engineering Plant Economics
The depreciation during the year 'n', in diminishing balance method of depreciation calculation, is calculated by multiplying a fixed percentage 'N' to the

Difference between initial cost and salvage value
Initial cost
Depreciation during the (n - 1)th year
Book value at the end of (n - 1)th year

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