chemical engineering MCQs – Page 14

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 Review each marked answer and report any item that may be outdated or unclear.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

261. Thermodynamic cycle involved in the working of a thermal power plant is the ______________ cycle ?
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A. Carnot

B. Brayton

C. Joule

D. Rankine

262. Which of the following metals is the most prone to work hardening ?
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A. Lead

B. Brass

C. Aluminium

D. Copper

263. Increasing sulphur content in pig iron tends to make it ________________?
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A. Ductile & malleable

B. Tough

C. Soft

D. Hard

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

B. Briquettes

C. Sinter

D. Lumps

265. At 100% relative humidity, the dew point temperature of moist air is_________________?
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A. Equal to the wet bulb temperature

B. Equal to the ambient temperature

C. More than the wet bulb temperature

D. Less than the wet bulb temperature

266. Steel containing low percentage of nickel, chromium & tungsten are termed as the _____________ steel ?
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A. Tool

B. Wrought

C. Plain carbon

D. Alloy

267. Wohler test is a destructive test to find out the ___________________ strength of a prepared metal specimen ?
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A. Endurance

B. Tensile

C. Fatigue

D. Creep

268. Chromium molybdenum steel cannot be welded using ______________ welding ?
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A. Oxy-acetylene

B. Thermit

C. Any of these

D. Electrical resistance

269. A high pressure boiler generates steam at a pressure greater than _____________________ kg/cm2 ?
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A. 80

B. 30

C. 50

D. 10

270. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of _______________ steel bars?
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A. Forged

B. Cold rolled mild

C. Hot rolled mild

D. Machinable stainless

271. The phenomenon occurring during explosion of a hydrogen bomb is___________________?
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A. Nuclear fission

B. Nuclear fusion

C. A combination of both nuclear fission & fusion

D. None of these

272. For preparation of porous bearings by powder metallurgy, preferred particle shape is___________________?
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A. Irregular

B. No preferred shape

C. Nodular

D. Spherical

273. Which of the following is preferred for riveting ?
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A. Butt joint

B. Lap joint

C. Neither A. nor B.

D. Either A. or B.

274. Gage pressure within a spherical droplet of a fluid is p. What will be gage pressure within a bubble of the same size & of the same fluid ?
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A. 2 p

B. p

C. 0.25 p

D. 0.5 p

275. Fatigue resistance of a material is measured by the _____________________?
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A. Elastic limit

B. Youngs modulus

C. Ultimate tensile strength

D. Endurance limit

276. Change in volume of metals from absolute zero temperature to their melting points is___________________?
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A. Almost same for all metals

B. Less for low melting point metals

C. Different for different metals

D. Less for high melting point metals

277. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?
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A. Conduction

B. Convection

C. Radiation

D. Both A. & B.

278. Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore ?
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A. Low density

B. High fusibility & fluidity

C. High chemical activity

D. High thermal conductivity

279. Heating the Hypo-eutectoid steels to 30C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
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A. Normalising

B. Hardening

C. Annealing

D. Tempering

280. Larger length & diameter water pipes are made by____________________?
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A. Electrical resistance welding

B. Continuous casting

C. Die casting

D. Semi-centrifugal casting

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