chemical engineering MCQs – Page 12

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 Review each marked answer and report any item that may be outdated or unclear.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
221. Material of construction of the electrode used in the electric resistance welding is___________________?
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A. Steel

B. Graphite

C. Copper

D. Stainless steel

222. Uniform ramming of sand in green sand moulding process leads to____________________?
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A. Uniform flow of molten metal into the mould cavity

B. Reduced chance of gas porosity

C. Greater dimensional stability of the casting

D. Less sand expansion type of casting defect

223. _______________ test can be termed as the semi-destructive test?
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A. Charpy

B. Torsion

C. Hardness

D. Impact

224. The bolt is subjected to _______________ when the nut is tightened by putting the washer beneath it?
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A. Bending & tension

B. Compression

C. Shear

D. Tension
225. Matte smelting is used in the extraction of_____________________?
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A. Copper

B. Lead

C. Aluminium

D. Zinc

226. Which of the following is an ore dressing operation ?
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A. Smelting

B. None of these

C. Classification

D. Roasting

227. The surface tension of a liquid, at critical temperature is____________________?
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A. Zero

B. Same as that at any other temperature

C. Infinity

D. Indeterminate

228. Carnot cycle is also termed as the constant _________________ cycle in thermodynamics?
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A. Entropy

B. Heat

C. Pressure

D. Volume

229. Stresses encountered in the metal forming processes are less than the _____________ of the material?
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A. Limit of proportionality

B. Elastic limit

C. Fracture strength

D. Yield strength

230. Which of the following has the least value of ultimate tensile strength (UTS) ?
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A. Wrought iron

B. Medium carbon steel

C. Cast iron

D. High carbon steel
231. In an eutectic system, two elements are completely____________________?
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A. Soluble in solid state

B. Insoluble in liquid state

C. Insoluble in both solid & liquid state

D. Soluble in liquid state
232. Youngs modulus of a material is the measure of its ___________________?
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A. Creep resistance

B. Malleability

C. Tensile strength

D. Stiffness
233. The specific gravity of coal depends mainly on its __________________ content ?
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A. Ash

B. Volatile matter

C. Carbon

D. Moisture
234. Babbitt lining is used on brass/bronze bearings to increase the____________________?
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A. Compressive strength

B. Antifriction properties

C. Wear resistance

D. Bearing resistance

235. An atom bomb works on the principle of __________________?
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A. Nuclear fission

B. Nuclear fusion

C. Both the nuclear fission & fusion

D. Ionisation

236. When the wavelength of incident X-rays increases, the angle of diffraction__________________?
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A. Decreases

B. Remain constant

C. Shows no systematic variation

D. Increases

237. Which of the following equipments is used for liquid dispersion ?
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A. Wetted wall column

B. Venturi scrubber

C. Bubble cap plate column

D. Packed column

238. Austempering process results in the formation of ________________ structure ?
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A. Carburised

B. Stressed

C. Bainitic

D. Martensitic

239. Factor of safety in machine design is defined as the ratio of ultimate stress to _____________ stress ?
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A. Bearing

B. Working

C. None of these

D. Yield

240. One face of a furnace wall is at 1030C and the other face is exposed to room temperature (30C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is____________________?
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A. 10000

B. 100

C. 9000

D. 900