Chemical Engineering Plant Economics
'Utilities' in a chemical process plant includes compressed air, steam, water, electrical power, oxygen, acetylene, fuel gases etc. Utility costs for ordinary chemical process plants ranges roughly from __________ percent of the total product cost.

35 to 45
10 to 20
1 to 5
25 to 35

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

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Chemical Engineering Plant Economics
Pick out the correct statement.

Sum-of-the-years-digits methods of depreciation calculation accounts for the interest on the investment
Unamortised cost is the difference between the original cost of a property and all the depreciation charges made to dat
Scrap value is the net amount of money obtainable from the sale of used property over and above any charges involved in its removal & sale
Difference between income and expense is termed as gross revenue

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