15. According to six-tenths-factor rule, if the cost of a given unit at one capacity is known, then the cost of similar unit with times the capacity of the first unit is approximately equal to __________ times the cost of the initial unit.
16. Expenditure on research and development (R & D) is categorised as the __________ , while making an estimate of the total product cost for a chemical plant.
17. A shareholder has __________ say in the affairs of company management compared to a debenture holder.
18. The ratio of gross annual sales to the fixed capital investment is termed as the __________ ratio.
21. Which of the following is the costliest material of construction used in pressure vessel construction?
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