Chemical Engineering MCQs

6108 MCQs (Page 25 of 611)

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Which of the following equipments is used for liquid dispersion ?

A. Packed column
B. Venturi scrubber
C. Bubble cap plate column
D. Wetted wall column

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Limestone is added in the blast furnace (during pig iron manufacture) to______________________?

A. Form slag by combining with impurities
B. Supply heat by undergoing exothermic reaction with impurities
C. Reduce the coke consumption
D. Reduce slag viscosity

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The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to _____________ °D ?

A. 140
B. 180
C. 240
D. 280

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Difference at any instant between the value of the controlled variable and the set point is called the__________________?

A. Deviation
B. Derivative time
C. Error ratio
D. Differential gap

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Cementite is in the lamellar form in the _____________________ phase of steel ?

A. Martenistic
B. Bainitic
C. Pearlitic
D. Ferritic

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Brazing is the joining of metals_____________________?

A. Without melting the base metal
B. With a non-ferrous filler
C. Both a. & b.
D. Neither a. nor (b)

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Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________?

A. Lumps
B. Pellets
C. Briquettes
D. Sinter

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Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be_____________________?

A. 5
B. 1.25
C. 2.5
D. 3.75

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Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?

A. Wood’s metal
B. Babbitt metal
C. Monel metal
D. Duralumin

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Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________?

A. 90% tungsten carbide and 10% cobalt
B. 70% aluminium oxide & 30% silica
C. 30% nickel, 15% chromium & 55% tungsten
D. 65% tungsten & 35% zirconium

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