Chemical Engineering Plant Economics
'Lang factor' is defined as the ratio of the capital investment to the delivered cost of major equipments. The value of 'Lang factor' for fixed capital investment, for a solid-fluid processing chemical plant ranges from

6.2 to 6.4
2.5 to 2.7
1.2 to 1.4
4.2 to 4.4

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Chemical Engineering Plant Economics
In a manufacturing industry, break even point occurs, when the

Annual profit equals the expected value
Total annual rate of production equals the assigned value
Annual sales equals the fixed cost
Total annual product cost equals the total annual sales

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