chemical engineering materials and construction MCQs – Page 10

Practise multiple-choice questions from chemical engineering materials and construction for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering materials and construction Mcqs
181. H2SO4 (< 50% concentration) is corrosive to_________________?
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A. Rubber (butyl and hard), silicone rubber & Teflon

B. Glass, graphite, porcelain & stoneware

C. Aluminium, mild steel, stainless steel, concrete & tin

D. Copper, cast iron & high silicon iron (14% Si)

182. The digester of a Gobar gas plant is a___________________?
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A. Cast iron vessel

B. Masonry well

C. Mild steel drum

D. Stainless steel vessel

183. Glass lined vessels are not used for handling__________________?
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A. Dilute HNO3

B. Dilute HCI

C. Hydrofluoric acid

D. Dilute H2SO4

184. Evaporators used in caustic soda recovery and production plant are made of_______________?
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A. Gun metal

B. Wood metal

C. Babbitt metal

D. Monel metal
185. Which of the following alloys does not contain nickel ?
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A. Babbitt metal

B. Inconel

C. Monel

D. Chloro, et-2 alloy

186. Platinum and silver are corroded by___________________?
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A. Phosphoric acid

B. Sulphuric acid (10%)

C. None of these

D. Caustic soda solution

187. Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of___________________?
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A. Lead lined mild steel

B. Aluminium

C. Cast iron

D. Rubber lined mild steel
188. Copper has very low________________?
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A. Ductility

B. Tensile strength

C. Thermal & electrical conductivity

D. Malleability

189. Which of the following is the most elastic material ?
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A. Steel

B. Plastic

C. Glass

D. Rubber

190. Silicone rubber is not resistant to the corrosive action of____________________?
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A. Sulphuric acid (10%)

B. Sulphuric acid (95%)

C. Ether

D. Both B. and C.
191. Addition of _____________ in steel can help in increasing the depth of hardness?
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A. Tungsten

B. Chromium

C. Vanadium

D. Nickel

192. Babbitt metal (used for making bearings) comprises of__________________?
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A. Mainly tin (85%) and lead

B. Saw dust and iron dust mixture

C. Copper and aluminium

D. Zinc and aluminium

193. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called____________________?
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A. Kanthal

B. German silver

C. Constantan

D. Chromel

194. Pure nickel is___________________?
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A. Ferromagnetic at room temperature

B. Having h.c.p. crystal lattice

C. Not resistant to oxidation at high temperature

D. Ferromagnetic above its curie point (i.e., 415C)

195. Hydrochloric acid is stored in a _____________ steel vessel?
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A. Glass lined

B. Lead lined

C. Rubber lined

D. Stainless

196. Soap kettle used in the production of laundry soap is made of____________________?
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A. Steel with top section nickel clad or stainless steel

B. Concrete

C. Nickel

D. Cast iron

197. Hydrochloric acid is _______________ corrosive to common metals?
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A. Highly

B. Mildly

C. Not

D. Least

198. Vessels made of _____________ can be used to store dry chlorine?
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A. Nickel

B. Thermoplastic materials

C. Steel or iron

D. None of these

199. Kel-F is a material, which is________________?
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A. Chemically known as Polychlorotrifluoroethylene (PTFE)

B. Having excellent chemical & high temperature resistance (upto 200C)

C. All A., B. and C.

D. Having elastomeric properties

200. Ammonium chloride solution is stored/ treated in _____________ vessels/pipes?
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A. Plain carbon steel

B. Lead

C. Stainless steel

D. Rubber or durmet-20 lined