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.

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

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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

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

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