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

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

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Chemical Engineering Plant Economics
An annuity is a series of equal payments occuring at equal time intervals, and this amount includes the sum of all payments plus interest, if allowed to accumulate at a definite rate of interest from the time of initial payment to the end of annuity term. Ordinary annuity is used in the calculation of the

Cash ratio
Discrete compound interest
Manufacturing cost
Depreciation by sinking fund method

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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
Depreciation during the (n - 1)th year
Book value at the end of (n - 1)th year
Initial cost

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