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Chemical Engineering - Chemical Engineering Basics

Exercise : Chemical Engineering Basics - Section 12
11.
__________ method of depreciation calculation ensures that the interest is charged on the cost of machine asset every year on the book value, but the rate of depreciation remains constant every year.
Annuity charging
Atraight line
Ainking fund
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Main alloying element in Elinvar used in precision instruments, hair springs for watches etc. is
chromium
nickel
zinc
aluminium
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.
grey
red
orange
violet
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Heat dissipation in cooling towers is mainly by
conduction
convection
evaporation
radiation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In BOF, desiliconisation is a first order reaction. So the silicon content of the metal decreases
linearly with time.
exponentially with time.
logarithmically with time.
in proportion to the square root of time.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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