chemical engineering materials and construction Mcqs
351. Hastelloy C is a good material of construction in chemical process industry, since it is ___________________?
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A. Highly corrosion resistant and is readily fabricated

B. Relatively inexpensive although it can be fabricated with some difficulty

C. Light and resists attack by acids

D. Corrosion resistant to most alkalis, particularly because of its copper content

352. Vycor, a widely used material for making thermal wells in temperature measurement, is a_______________?
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A. Cermet

B. Thermosetting plastic

C. Metallic alloy

D. Glass
353. A material is called ductile, if it can be__________________?
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A. Made lustrous by heating it

B. Fractured without deformation

C. Drawn into wires

D. Hammered to a thin sheet

354. Hydrocyanic acid is not shipped in______________?
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A. Monel drums

B. Aluminium containers

C. Cast iron vessels

D. Steel cylinders

355. In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of _______________?
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A. Wood

B. Porcelain

C. Concrete

D. Steel
356. Carbon tetrachloride can be stored in a storage vessel made of________________?
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A. Stainless steel

B. Tin

C. All A., B. and C.

D. High silicon iron (14% Si)

357. Carbon is present in steel wholly in the__________________?
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A. Combined form

B. Free state as graphite

C. Both A. and B.

D. Neither A. nor B.

358. Iron alloyed with carbon upto 2% is called___________________?
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A. Wrought iron

B. High carbon steel

C. Pig iron

D. None of these
359. Clock pendulums are usually made of _______________ steel?
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A. None of these

B. Stainless

C. High speed

D. Heat resisting

360. Biological shield in a nuclear power reactor is made of________________?
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A. Steel

B. Cadmium

C. Concrete

D. Zircaloy

361. Which is the purest form of iron ?
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A. Pig iron

B. Wrought iron

C. Grey iron

D. Bessemer iron

362. Reduction in the grain size reduces the _______________ of the material?
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A. Tensile strength

B. Creep resistance

C. All A., B. & C.

D. Fatigue resistance

363. Trough of an apron conveyor is made of___________________?
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A. Either B. or C.

B. Metal

C. Lead lined concrete vessel

D. Wood

364. The ability of a material to offer resistance to scratching or indentation is a measure of its_________________?
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A. Resilience

B. Toughness

C. Brittleness

D. Hardness
365. Which of the following is produced by condensation polymerisation ?
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A. Bakelite

B. Poly vinyl chloride

C. Polystyrene

D. Polythene

366. Amount of energy that a material can absorb before its fracture is a measure of its _________________?
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A. Toughness

B. Ductility

C. Resilience

D. Malleability

367. Cast iron vessels are not suitable for the storage of_________________?
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A. Wet SO2

B. H2SO4 (fuming)

C. H2SO4 (95%) at room temperature

D. Freon

368. For storing water and acid free benzol, use a ______________ vessel?
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A. Karbate

B. Steel

C. None of these

D. Stainless steel

369. The specific gravity of coal depends mainly on its ______________ content?
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A. Carbon

B. Volatile matter

C. Moisture

D. Ash
370. The process of coating steel sheets by zinc to improve its corrosion resistance is called___________________?
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A. Calorising

B. Zincification

C. Galvanising

D. Tempering

371. Maximum carbon content in cast iron is ______________ percent?
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A. 3.8

B. 4.3

C. 5.2

D. 4.8

372. Silicon percentage in iron castings to have maximum hardness should be about__________________?
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A. 0.5

B. 0.8

C. 0.3

D. 2.5

373. Carbon content in steel is ___________________ percent?
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A. 6-Apr

B. 0.001-0.01

C. 0.1-2

D. 4-Feb

374. Nitriding of steel is a process for________________?
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A. Normalising

B. Case hardening

C. Annealing

D. Spheroidising

375. Hydrochloric acid is stored in a ________________vessel?
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A. Rubber lined steel

B. Lead lined steel

C. Cast iron

D. Stainless steel

376. Inconel is an alloy of_________________?
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A. Iron, nickel and chromium

B. Tin, zinc and nickel

C. Copper and nickel

D. Copper and tin

377. Presence of manganese in alloy steel improves its___________________?
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A. Corrosion resistance

B. Abrasion resistance & toughness

C. Cutting ability

D. Elasticity & creep resistance

378. High speed cutting tool steels contain about _______________ percent of tungsten?
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A. 50-55

B. 18-20

C. 30-35

D. 8-Jun

379. _____________ moulding process cannot be used for thermoplastic plastics?
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A. Compression

B. None of these

C. Extrusion

D. Injection
380. Wrought iron is a suitable material of construction for handling _____________ solutions?
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A. Alkalis & alkaline

B. None of these

C. Dilute acidic

D. Concentrated acidic

381. Copper is dissolved from its ore by H2SO4 in a percolation tank made of_________________?
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A. Wood

B. Reinforced concrete lined with lead

C. Stainless steel

D. High silicon iron (14% Si)

382. How many atoms are there per unit cell in a body centred cubic lattice system ?
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A. 2

B. 6

C. 3

D. 5

383. Aqueous nitric acid is stored in ______________ vessel?
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A. Stainless steel

B. Cast iron

C. Plain carbon steel

D. Thermosetting plastic material

384. High carbon steel contains more than _____________ percent carbon?
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A. 0.5

B. 2.8

C. 2.5

D. 2.2

385. Steel rods are used in reinforced concrete to increase its ______________ strength?
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A. Shear

B. Tensile

C. None of these

D. Compressive

386. Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with______________?
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A. Lead or acid proof bricks

B. Karbate

C. Rubber

D. Acidic refractory
387. Karbate is____________________?
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A. A mixture of iron dust and saw dust

B. Carbon impregnated with resin (usually Bakelite)

C. An acid resistant material

D. Both B. and C.
388. _______________ does not contain tin as an alloying material?
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A. Solder

B. Brass

C. Babbitt metal

D. Pewter

389. Among the tin containing alloys, ______________ consumes the maximum amount of tin?
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A. Bronzes

B. Pewter metal

C. Solder

D. White metal

390. Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of__________________?
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A. Aluminium

B. Stainless steel or glass lined steel

C. High silicon cast iron

D. Nickel clad steel

391. A material capable of undergoing large permanent deformation, when subjected to tension is termed as___________________?
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A. Friable

B. None of these

C. Ductile

D. Brittle

392. Containers made of high silicon cast iron (14% Si) are not suitable for the storage of ____________________?
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A. Acetic acid

B. Hydrochloric acid (concentrated)

C. Phosphoric acid (95%) & sulphuric acid (95%)

D. Benzoic & boric acids

393. Which of the following is the most prone to atmospheric corrosion ?
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A. Copper

B. Tin

C. Iron

D. Silver

394. Wrought iron is having very high ________________?
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A. Strength

B. Hardness

C. Susceptibility to changes in its properties by heat treatment

D. Corrosion resistance
395. Corrosion resisting properties of cast iron are significantly improved by the addition of 12 15% of___________________?
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A. Silicon

B. Vanadium

C. Tungsten

D. All A., B. & C.

396. Which of the following is a low melting point metal ?
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A. Copper

B. Tin

C. Wrought iron

D. Stainless steel

397. A hardness depth of about 3 mm can be achieved by induction hardness in ______________ seconds?
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A. 5

B. 500

C. 250

D. 100

398. Reactor used in the production of polyvinyl chloride (PVC) is made of____________________?
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A. Tantalum

B. Nickel or glass lined steel

C. Lead

D. Aluminium

399. Metalloid is__________________?
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A. Highly electronegative in nature

B. An element which exhibits the properties of both metal & non-metal

C. An alloy

D. All A., B. and C.

400. Cast iron is having very high ___________________?
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A. Proximity between its elastic limit and ultimate breaking strength

B. Ductility

C. All A., B. and C.

D. Tensile strength