chemical engineering MCQs – Page 42

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 Review each marked answer and report any item that may be outdated or unclear.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
821. In which of the electric power generation system, the operating cost is minimum ?
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A. Thermal

B. Hydroelectric

C. Fast breeder reactor

D. Nuclear

822. Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of________________?
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A. Copper

B. Steel

C. Glass wood

D. Fireclay bricks

823. Dikes are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel) ?
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A. V/2

B. 2V

C. V

D. 3V

824. Reaction of calcium carbide with water produces a gas, which is used_________________?
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A. As an illuminant

B. For metal cutting/welding

C. Both A. & B.

D. Neither A. nor B.

825. Thermal equivalent of electrical power in practical calculation is _______________ kcal/kWh ?
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A. 550

B. 1000

C. 746

D. 3000
826. Annual depreciation costs are constant, when the ______________ method of depreciation calculation is used ?
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A. Straight line

B. None of these

C. Sum of the years digit

D. Declining balance

827. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?
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A. T2/T1

B. T1/(T1-T2)

C. T2/(T1-T2)

D. T1/T2

828. Thermit welding is categorised as the ______________________ welding ?
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A. Fusion

B. Arc

C. Forge

D. Resistance

829. A present sum of Rs. 100 at the end of one year, with half yearly rate of interest at 10%, will be Rs ?
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A. 97

B. 110

C. 91

D. 121
830. The co-ordination number in simple cubic structure is___________________?
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A. 12

B. 6

C. 8

D. 4

831. With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and _____________ is not affected ?
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A. Impact strength

B. Percent elongation

C. Hardness

D. Both B & C

832. Batch process is preferred over continuous process, when the___________________?
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A. Same equipment cannot be used for several processes of the same nature

B. Sales demand of product is not steady

C. Product yields and quality cannot be achieved in continuous process, because of long

D. idence time

E. All (A), B. & (C)

833. Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type________________?
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A. Parallel flow with unequal heat capacities

B. Counter flow with equal heat capacities

C. Parallel flow with equal heat capacities

D. Counter flow with unequal heat capacities

834. _______________ is not a case hardening process ?
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A. Cyaniding

B. Annealing

C. Nitriding

D. Carburising
835. Most chemical plants use an initial working capital amounting to 10-20% of the total capital investment. But this percentage may increase to ______________ percent in case of seasonal products manufacturing plant?
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A. 50

B. 30

C. 75

D. 95

836. The amount of compounded interest during n interest periods is_________________?
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A. p(1 + i)n

B. p[(1+i)n 1)]

C. p(1 i)n

D. p(1 + in)

837. Steel produced from phosphatic iron is _______________ in nature?
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A. Tough

B. Ductile

C. Brittle

D. Malleable

838. Six-tenth factor rule is used for estimating the_________________?
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A. Cost of piping

B. Utilities cost

C. Equipment cost by scaling

D. Equipment installation cost

839. Lang factor is defined as the ratio of the capital investment to the delivered cost of major equipments. The value of Lang factor for fixed capital investment, for a solid-fluid processing chemical plant ranges from ?
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A. 1.2 to 1.4

B. 6.2 to 6.4

C. 4.2 to 4.4

D. 2.5 to 2.7

840. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?
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A. Xanthaies

B. All A, B. & C.

C. Cresylic acid

D. Pine oil