chemical engineering materials and construction MCQs – Page 6

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 Review each marked answer and report any item that may be outdated or unclear.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
251. Rubber lined vessels are corroded by the action of__________________?
comments icon0

A. Chloroform

B. All A., B. and C.

C. Aqua regia

D. Sulphuric acid (95%)

252. Lead alone is not used in storing equipment, because it________________?
comments icon0
A. Is having low creep strength

B. Is very costly

C. Corrodes easily

D. None of these

253. Austenitic manganese steel used for making jaws of crushing machines contains about ______________ percent manganese?
comments icon0
A. 12-14

B. 1.5-2

C. 9-Jul

D. 3.5-4.5

254. Presence of nickel in steel improves its_________________?
comments icon0

A. Cutting ability

B. Corrosion resistance

C. Wear resistance

D. All A., B. and C.

255. Pick the odd man out of the following?
comments icon0

A. Nitriding

B. Cyaniding

C. Calorising

D. Pack carburising

256. Ceramic recuperators are generally made of_________________?
comments icon0
A. Silicon carbide

B. High alumina bricks

C. Calcium carbide

D. Fireclay bricks

257. Creep is not exhibited at low temperature by _____________________?
comments icon0

A. Plastics

B. Lead

C. Acrylics

D. Rubber

258. Mild steel is used for making___________________?
comments icon0

A. Drop forging

B. Channels

C. Die block

D. Fish plates

259. Ceramic materials__________________?
comments icon0
A. All A., B. and C.

B. Are exemplified by clay and mica

C. Never exhibit polymorphism

D. Are poor electrical conductors due to lack of free electrons

260. Dielectric strength of a material is____________________?
comments icon0
A. Its capacity to withstand high voltage

B. A magnetic property

C. Its capacity to resist the flow of current

D. Its energy storage capacity

261. Which of the following is an alloy of nickel and copper ?
comments icon0

A. Inconel

B. Hastelloy

C. Monel

D. Duriron

262. Slow and progressive deformation of a material with time under constant stress is called___________________?
comments icon0

A. Erosion

B. Creep

C. Resilience

D. None of these

263. Corrosion resistance of steel is increased by the addition of_________________?
comments icon0

A. Lead and vanadium

B. Nickel and chromium

C. Molybdenum and tungsten

D. Phosphorous and tungsten

264. Fermenter used in the production of penicillin by deep fermentation process is a ______________ lined steel vessel ?
comments icon0

A. Monel

B. Rubber

C. Glass

D. Nickel

265. Invar used in thermocouples is an alloy of nickel and________________?
comments icon0
A. Iron

B. Lead

C. Chromium

D. Copper

266. Which of the following has the poorest weldability ?
comments icon0
A. High-carbon steel

B. Low carbon steel

C. Mild steel

D. Wrought iron

267. Nickel (76%) and chromium (15%) alloys are termed as______________________?
comments icon0

A. Monel

B. Aluminium bronzes

C. Brass

D. Inconel
268. Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its___________________?
comments icon0

A. Low temperature strength properties

B. High strength and corrosion & oxidation-resistance at elevated temperature

C. High strength to weight ratio

D. Its ability to be cast, rolled, forged & stamped

269. Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and_________________?
comments icon0

A. Moving mercury and graphite

B. Graphite and moving mercury

C. Moving mercury and crimped steel wire

D. Moving mercury and carbon

270. Hammers and railway rails are normally made of___________________?
comments icon0
A. High carbon steel

B. Mild steel

C. Dead mild steel

D. Medium carbon steel

271. ______________ is not a case hardening process?
comments icon0

A. Carburising

B. Nitriding

C. Annealing

D. Cyaniding

272. Urea autoclave is made of_________________?
comments icon0
A. Stainless steel

B. Cast iron

C. Refractory blocks

D. Lead lined steel

273. Low carbon steels are those in which carbon percentage is around____________________?
comments icon0
A. 0.1 to 0.35

B. 0.8 to 1.5

C. 1.5 to 2

D. 0.4 to 0.7

274. Cementite is________________?
comments icon0

A. A compound of carbon and iron

B. All A., B. and C.

C. Fe3C chemically

D. Characterised by an orthorhombic crystal structure

275. Zinc is highly ______________ at room temperature?
comments icon0

A. Ductile

B. Resistant to atmospheric corrosion

C. Brittle

D. Malleable

276. All materials obey Hookes law within elastic limit. When elastic limit is reached, the tensile strain__________________?
comments icon0

A. Increases in proportion to stress

B. Decreases very quickly

C. Increases very quickly

D. Decreases in proportion to stress

277. Perspex is nothing but_____________________?
comments icon0

A. An elastomer

B. Acrylic sheet

C. Aluminium foil clad with Bakelite

D. An alloy of lead and tin

278. Generally _____________ are subjected to galvanising (i.e., zinc coating)?
comments icon0

A. Non-metals

B. Non-ferrous metals

C. Stainless steel

D. Low carbon steels
279. Cast iron and steel pipes are produced by ____________ casting?
comments icon0

A. Slush

B. Die

C. Investment

D. True centrifugal
280. Plasticisers are added to polymers to improve their____________________?
comments icon0

A. Tensile strength

B. Softness & flexibility

C. Alkali resistance

D. Acid resistance

281. Mild steel is ___________________?
comments icon0
A. A low carbon steel (0.05 to 0.3% carbon)

B. Very poor in strength & ductility

C. Highly resistant to corrosion (as much as stainless steel)

D. A high carbon steel (0.5 to 1.5% carbon)

282. The softest material in Mhos scale (for measuring hardness) is________________?
comments icon0

A. None of these

B. Rubber

C. Gypsum

D. Talc
283. Plate and frame filter press is usually made of__________________?
comments icon0

A. Stainless steel

B. Cast iron

C. Mild steel

D. Galvanised iron

284. Rubber lined pumps can be used to pump_________________?
comments icon0

A. Chlorinated brine

B. Hypochlorous acid

C. Caustic soda

D. All A., B. and C.
285. Softness of silver can be converted into hardness by alloying it with small quantity of_________________?
comments icon0

A. Zinc

B. Aluminium

C. Tin

D. Copper & nickel
286. Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?
comments icon0

A. None of these

B. Phosphorus

C. Silicon

D. Sulphur

287. Constituents of stellite are__________________?
comments icon0

A. Nickel, cobalt and vanadium

B. Zinc, aluminium and nickel

C. Zinc, copper and nickel

D. Cobalt, chromium and tungsten
288. Nickel is a constituent of ________________________?
comments icon0

A. Duralumin

B. Monel metal

C. Bronze

D. Solder

289. Invar contains the highest percentage of___________________?
comments icon0

A. Tungsten

B. Cobalt

C. Iron

D. Vanadium

290. Addition of ______________ to the steel helps in increasing the residual magnetism in steel used for making magnets?
comments icon0

A. Tungsten

B. Nickel

C. Chromium

D. Cobalt
291. The metals occuring at the lower most position in the electromotive series____________________?
comments icon0

A. Do not resist corrosion

B. Are heat insulators

C. Resist corrosion very strongly

D. Are very brittle

292. In order to be called steel, an alloy should have iron percentage greater than____________________?
comments icon0

A. 70

B. 80

C. 90

D. 50

293. Most common stainless steel type 316, which is highly resistant to corrosion contains______________?
comments icon0

A. 2-4% Cr, 22% NI and 2-4% Mo

B. 16-13% Cr 10-14% Ni and 2-3% Mo

C. 20-22% Cr, and 8-10% Ni

D. None of these

294. Brine (15% concentration) can be stored in a vessel made of____________________?
comments icon0

A. Cast iron

B. Karbate

C. Monel

D. None of these

295. _____________ iron is produced, when molten pig iron is chilled suddenly?
comments icon0

A. None of these

B. Wrought

C. White cast

D. Grey cast

296. Semi steel is__________________?
comments icon0

A. Produced by adding 10-20% steel to the cupola charge

B. Stronger than cast iron

C. Both A. and B.

D. Neither A. nor B.

297. Which of the following metals in not used for coating of the base metal to guard it against corrosion ?
comments icon0
A. Magnesium

B. Aluminium

C. Cadmium

D. Lead

298. Mild steel is a/an _____________ steel?
comments icon0

A. Medium carbon

B. Low carbon

C. High carbon

D. High alloy

299. Mercury is transported in metal containers made of________________?
comments icon0

A. Aluminium

B. Iron

C. Lead

D. Nickel

300. Which of the following has the least value of ultimate tensile strength (UTS) ?
comments icon0

A. Medium carbon steel

B. Cast iron

C. Wrought iron

D. High carbon steel