chemical engineering MCQs – Page 40

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

781. Fixed capital investment of a chemical plant is the total amount of money needed to supply the necessary plant and manufacturing facilities plus the working capital for operation of the facilities. Which of the following components of fixed capital investment requires minimum percentage of it ?
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A. Equipment installation cost

B. Cost for piping

C. Electrical installation cost

D. Equipment insulation cost

782. Holes for riveting purposes should be preferably made by________________?
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A. None of these

B. Drilling

C. Punching

D. Cutting torch

783. The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about ________________ cm2/gm?
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A. 4000

B. 1600

C. 8500

D. 800

784. P is the investment made on an equipment, S is its salvage value and n is the life of the equipment in years. The depreciation for Rath year by the sum-of year?s digit method will be____________________?
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A. 1 (P/S)1/m

B. [2 (n m + 1)/n(n + 1)]. (P S)

C. (P S)/n

D. (m/n) (P S)

785. Pick out the wrong statement?
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A. Brittle materials are generally tested in tension

B. Fatigue fracture of a material is always brittle in nature and takes place due to the existence of

C. sed by the formation and coalescence of voids in the necked region

D. Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation

E. Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly

F. e imperfections

786. Carboxymethyl cellulose (CMC) is added in detergents to_________________?
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A. Act as optical brightening agent

B. Prevent redeposition of soil on cleaned surface

C. None of these

D. Inhibit corrosion in washing machines made of aluminium

787. Pick out the wrong statement ?
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A. Crushing load or columns is less than the buckling load

B. Modulus of resilience is proportional to (stress at elastic limit)2

C. 2S

D. For a helical spring, deflection is proportional to D3 (D = mean coil diameter) or d4 (d = wire

E. The equivalent stiffness of two springs (of equal stiffness S) in series is S/2 while in parallel

F. meter)

788. Unbreakable crockeries are made from ______________ polymers?
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A. Polystyrene

B. Polyurethane

C. Polystyrene

D. Melamine

789. Depreciation________________?
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A. ermination

B. Is the unavoidable loss in the value of the plant, equipment and materials with lapse in time

C. All A, B. and C.

D. Costs (on annual basis) are constant when the straight line method is used for its

E. Does figure in the calculation of income tax liability on cash flows from an investment

790. Brazing filler metal used for joining steel plates_________________?
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A. Melts below 300C

B. Is copper phosphorous alloy

C. Is copper

D. Melts below the melting points of base metals

791. Dryness fraction of dry steam is_________________?
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A. 1

B. 0.5

C. ?

D. 0

792. If S is the amount available after n interest periods for an initial principal P with the discrete compound interest rate i, the present worth is given by__________________?
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A. S/(1 + i)n

B. (1 + i)n/S

C. S/(1 + in)

D. S/(1 + n)i

793. Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which _____________ with increase in the pressure of steam?
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A. May increase or decrease

B. Decreases

C. Increases

D. Remain same

794. Optimum number of effects in a multiple effect evaporator is decided by the____________________?
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A. Cost benefit analysis

B. Terminal parameters

C. Floor area availability

D. Evaporation capacity required

795. Nominal and effective interest rates are equal, when the interest is compounded______________?
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A. Quarterly

B. Annually

C. In no case, they are equal

D. Semi-annually

796. Operating profit of a chemical plant is equal to___________________?
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A. Profit after tax plus depreciation

B. Profit after tax

C. Profit before interest and tax i.e., net profit + interest + tax

D. Net profit + tax

797. What is the range of tempering temperature (C) for most of the materials ?
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A. 75-100

B. 500-600

C. 200-300

D. 350-450

798. Which of the following methods of depreciation calculations results in book values greater than those obtained with straight line method ?
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A. Declining balance method

B. Sinking fund method

C. Multiple straight line method

D. Sum of the years digit method

799. Generally, income taxes are based on the____________________?
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A. Gross earning

B. Fixed cost

C. Total product cost

D. Total income

800. Phenolic antiseptics are added in the __________________ soap?
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A. Transparent

B. Shaving

C. Metallic

D. Medicated

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