Chemical Engineering MCQs

Page No. 712

Pick out the wrong statement?


aGross margin = net income – net expenditure

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bNet sales realisation (NSR) = Gross sales – selling expenses

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cAt breakeven point, NSR is more than the total production cost

✓


dNet profit = Gross margin – depreciation – interest

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Nitrogen is an essential component of ____________________?


aMineral salts

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bCarbohydrates

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cFats

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dProteins

✓


View Answer Proteins

The type of high refractive index glass used in optical instruments is _____________ glass?


aPyrex

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bFlint

✓


cCrookes

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dNone of these

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View Answer Flint

Pick out the wrong statement ?


aThe annual depreciation rate for machinery and equipments in a chemical process plant is about 10% of the fixed capital investment

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bAnnual depreciation rate of buildings in a chemical plant is about 3% of its initial cost

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cInsurance rates on annual basis in a chemical plant may be about 1% of the fixed capital investment

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dIn a chemical industry, research and development cost amounts to about 15% of net sales realisation (NSR)

✓



Pick out the wrong statement ?


aWine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively

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bProtein catalysts are called enzymes

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cThe rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes

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dTotal sugar content in molasses is about 10%

✓



Caprolactam (a raw material for nylon-6 manufacture) is produced from ___________________?


aPhenol

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bNaphthalene

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cBenzene

✓


dPyridine

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View Answer Benzene

Calgon used in water treatment is chemically ____________________?


aSodium phosphate

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bSodium hexametaphosphate

✓


cCalcium phosphate

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dTricresyl phosphate

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In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by ?


aIncreasing the oxygen concentration

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bPutting more quantity of V2O5 catalyst in the converter

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cRemoving some quantity of SO3 during intermediate stage

✓


dMaintaining low temperature & pressure in the converter

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Coagulant is used _________________ filtration?


aBefore

✓


bAfter

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cDuring

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dTo avoid

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View Answer Before

Dense soda ash used in the manufacture of glass, is chemically represented by__________________?


aNa2CO3

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bNa2CO3.10H2O

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cNa2CO3.H2O

✓


dNa2HCO3

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View Answer Na2CO3.H2O

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