chemical engineering MCQs – Page 19

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 Review each marked answer and report any item that may be outdated or unclear.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
361. __________________ fluid force is not considered in the Navier-Stokes equation?
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A. Gravity

B. Turbulent

C. Viscous

D. Pressure

362. Fibre glass is a composite material of_________________?
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A. Glass fibre in a polymer matrix

B. Glass fibre in a metallic matrix

C. Polymer fibre in a glassy matrix

D. Both b & c

363. What is the value of entropy at 273K ?
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A. 0

B. None of these

C. ?

D. 1

364. On being hit with a hammer, ___________________ will readily fracture?
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A. Mild steel

B. Brass

C. Lead

D. Cast iron
365. The minimum carbon content in steel should be ____________________ percent for it to respond to a hardening treatment ?
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A. 0.6

B. 0.2

C. 0.8

D. 0.4

366. The temperature at which ferromagnetic material can no longer be magnetized by the outside forces, is termed as the____________________?
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A. Curie temperature

B. Inversion temperature

C. Critical point

D. Eutectic temperature

367. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA) ?
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A. Plexiglass

B. Lucite

C. Styrofoam

D. Perspex

368. An alloy of Fe 0.4 % C is__________________?
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A. Hypo-eutectoid steel

B. Hyper-eutectoid steel

C. Cast iron

D. Eutectoid steel

369. Inertial forces are obtained, when the elastic forces are multiplied by ______________ number?
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A. Froude

B. Euler

C. Reynolds

D. Mach
370. _______________ has a negative co-efficient of linear expansion?
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A. Rubber

B. Copper

C. Iron

D. Nickel

371. The usual energy consumption in electric arc furnace steel making is _____________ KWh/ton of steel ?
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A. 1200 -1500

B. 2000 2300

C. 400 700

D. 60 100

372. Corrosion of metals cannot be prevented by its__________________?
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A. Aluminising

B. Tempering

C. Alloying

D. Chromising

373. Nitriding of a steel part does not increase its__________________?
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A. Fatigue limit

B. Grain size

C. Surface hardness

D. Wear resistance

374. Powder metallurgy is used to produce__________________?
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A. Porosity free components

B. High precision components with complex cavities and sharp features

C. Components of such alloys whose constituents do not form alloys readily

D. Components of large size

375. A jet engine turbine blade is normally manufactured by____________________?
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A. Investment casting

B. Pressure die casting

C. Forging

D. Shell moulding

376. The cooling rate required to freeze 1 ton of water at 0C into ice at 0C in 24 hours is ______________ BTU/hr?
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A. 200

B. 1000

C. 100

D. 2000

377. Hydro-cyclone is a____________________?
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A. wet classifier

B. Magnetic separator

C. Crusher

D. Dry classifier

378. A common disinfectant used in village wells for disinfection of water is __________________?
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A. Potassium permanganate

B. Iodine

C. Bromine

D. Free chlorine

379. Thermit welding uses the following energy source ?
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A. Chemical energy

B. Heat generated by friction

C. Energy of high velocity electrons

D. Electrical energy

380. Rankine cycle comprises of two isothermal and two ___________________ processes?
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A. Isentropic

B. Polytropic

C. Isobaric

D. None of these