chemical engineering materials and construction Mcqs
301. Bush bearings are made of______________________?
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A. None of these

B. Phosphorous bronze

C. White metal alloys

D. Mild steel

302. Ball bearings are normally made of _____________ steel?
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A. High speed

B. Silicon

C. Chrome

D. High carbon

303. Thermosetting polymers are_________________?
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A. Injection moulded

B. None of these

C. Extruded

D. Cast molded
304. The most distinguished property of malleable cast iron is its high_________________?
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A. Ductility

B. None of these

C. Malleability

D. Hardness

305. Carbon content in plain carbon steel is ______________ percent?
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A. 0.1 to 0.15

B. 0.65 to 0.80

C. 0.85 to 1.2

D. 0.35 to 0.45
306. The increase in hardness of metal due to its cold working is termed as the _______________ hardening?
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A. Age

B. Flame

C. Work

D. Induction

307. Which of the following is the hardest material ?
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A. Fluorite

B. Topaz

C. Quartz

D. Corundum
308. White cast iron as compared to grey cast iron is ________________?
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A. Very brittle

B. More durable

C. Very hard

D. All A., B. & C.
309. Caustic soda is transported in _____________ lined containers ?
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A. Either B. or C.

B. Neoprene

C. Glass

D. Nickel

310. Dry chlorine can be handled in a vessel made of__________________?
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A. Iron or steel

B. PVC

C. Brass

D. Nickel

311. Pick out the wrong statement?
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A. Metal/alloys having hexagonal crystal lattice structure are less malleable than those having

B. ic crystal lattice structure

C. Metal/alloys having body centred cubic (bcc) crystal lattice structure is stronger & less ductile

D. n those having face centred cubic (fcc) crystal lattice structure

E. Tungsten has a body centred cubic (bcc) crystal lattice structure

F. Both ferritic & austenitic stainless steel has a face centred cubic (fcc) crystal structure

312. Which of the following is not an alloy of copper ?
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A. Pewter metal

B. German silver

C. Muntz metal

D. Admiralty gun metal

313. Manganese in steel affects its__________________?
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A. Tensile strength

B. Hardness

C. None of these

D. Ductility
314. Neutraliser tank used for reacting nitric acid with ammonia for the production of ammonium nitrate is made of________________?
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A. High silicon (14%) iron

B. Aluminium

C. Stainless steel

D. Copper

315. _____________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working?
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A. Twinning

B. Solid solution hardening

C. Screw dislocation

D. Strain ageing
316. Polymorphism is not exhibited by______________________?
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A. Iron

B. Phosphorous

C. Carbon

D. None of these
317. Maximum consumption of lead is in the manufacture of _________________________?
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A. Lead lined vessels

B. Solder alloys

C. Electric cable sheathing

D. Storage batteries
318. High speed steel tools retain their hardness upto a temperature of _____________ C?
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A. 500

B. 900

C. 750

D. 1100

319. Bell metal is an alloy of __________________?
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A. Copper & zinc

B. Copper & nickel

C. Zinc & tin

D. Copper & tin
320. Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the ______________ stress?
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A. Ultimate

B. Proof

C. None of these

D. Yield point

321. Mixing vessel used for the chlorination of methane to produce methyl chloride is made of___________________?
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A. Aluminium

B. High carbon steel

C. Copper

D. Cast iron
322. Which of the following comprises of hydrocarbons ?
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A. Glass

B. None of these

C. Rubber

D. Mica flakes

323. Stainless steel contains_________________?
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A. Copper

B. Chromium and nickel

C. Vanadium

D. Aluminium

324. The crystal structure of most of the common metals is_____________________?
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A. None of these

B. Hexagonal

C. Cubic

D. Orthorhombic

325. To improve the machinability of steel by its softening, it is subjected to __________________?
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A. Cold working

B. Heating

C. Shot blasting

D. Annealing
326. Spark plugs are made of______________________?
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A. High alumina ceramic

B. Metallic carbides

C. Carborundum

D. Corundum

327. Bearings subjected to light load are made of________________?
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A. Monel

B. Phosphorous bronze

C. Silicon bronze

D. White metal

328. _____________ is added in low carbon steel to raise its yield point?
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A. Manganese

B. Sulphur

C. Phosphorous

D. Silicon

329. The chlorinator used in the manufacture of DDT is made of___________________?
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A. Bakelite

B. Glass

C. Glass lined steel

D. Teflon

330. The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called__________________?
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A. Hysteresis

B. Relaxation

C. Hookes effect

D. Bauschinger effect
331. Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysteresis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?
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A. Induction motors

B. Generators and small motors

C. Armature of small motors/generators

D. High frequency transformers
332. Beehive coke ovens are made of ________________ bricks?
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A. Corundum

B. Fireclay

C. Silicon carbide

D. Silica
333. A chemical change takes place when iron_____________?
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A. None of these

B. Is heated

C. Melts

D. Rusts
334. Addition of nickel to copper improves its_________________?
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A. Machinability

B. Hardness

C. Strength

D. Ductility

335. Carbon is present in the combined form (carbide) in case of______________________?
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A. All A., B. & C.

B. Ferroalloys

C. Steel

D. Pig iron

336. Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making___________________?
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A. Chisels

B. Bolts

C. Studs

D. Nuts

337. Brine solution is stored/treated in _______________ lined vessels/pipes?
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A. Lead

B. Nickel

C. Rubber

D. Glass

338. Carbon supply in pack carburising process is in the form of_____________________?
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A. Charcoal

B. Hydrocarbon oil

C. Calcium carbide

D. Graphite

339. The bomb in the bomb calorimeter is made of___________________?
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A. Molybdenum stainless steel

B. High silicon iron (14% Si)

C. Mild steel

D. Copper

340. Visco-elastic behaviour of materials which is time dependent is common in______________?
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A. Non-crystalline solids

B. Plastics

C. Crystalline solid

D. Non-crystalline organic polymer
341. Addition of ______________ in steel is helpful in increasing the depth of hardness?
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A. Chromium

B. Sulphur

C. Tungsten

D. Vanadium

342. 18/8 stainless steel means, that it contains__________________?
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A. 18% molybdenum and 8% chromium

B. 18% chromium and 8% nickel

C. 18% nickel and 8% chromium

D. 18% chromium and 8% molybdenum

343. __________________ does not contain copper as an alloying element?
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A. Nichrome

B. Manganin

C. Perminvar

D. Monel metal

344. A magnetic material becomes ____________ above the Curie temperature?
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A. Paramagnetic

B. Diamagnetic

C. None of these

D. Ferromagnetic

345. Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system ?
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A. Copper, nickel and Monel

B. Cast iron, tin and aluminium

C. Mild steel and stainless steel

D. High silicon iron, silicon rubber, Kel-F and Teflon
346. Evaporator used for concentrating tomato juice is made of __________________?
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A. Stainless steel-glass lined

B. Brass

C. Nickel

D. Cast iron-rubber lined

347. The damage/deterioration of metals by the ______________ action of fluids is called erosion?
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A. Abrasive

B. Corrosive

C. Both A. & B.

D. Neither A. nor B.

348. Monel metal is an alloy of__________________?
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A. Molybdenum and zinc

B. Molybdenum and aluminium

C. Molybdenum and nickel

D. Nickel and copper
349. Approximate value of the modulus of elasticity for steel is about _____________ 106kg/cm2?
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A. 2

B. 0.5

C. 40

D. 75

350. Brass container is suitable for storing__________________?
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A. Beer

B. Phosphoric acid (95%)

C. Aqueous ammonia

D. H2SO4 (95%)