83. ‘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.

l to 5
10 to 20
25 to 35
35 to 45
✅ The correct answer is option B.

86. In declining balance method of depreciation calculation, the

value of the asset decreases linearly with time.
annual cost of depreciation is same every year.
annual depreciation is the fixed percentage of the property value at the beginning of the particular year.
none of these.
✅ The correct answer is option C.