1) Duriron is__________________? a. Acid resistant, brittle and very hard b. High silicon iron c. Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion d. All A., B. and C.
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2) The material of construction of bearings is__________________? a. Cast iron b. Babbitt metal c. Pig iron d. Steel
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3) Very high sulphur in pig iron makes ___________________? a. Its casting unsound b. Its hard and machinable c. Its brittle and malleable d. All A., B. & C.
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4) White cast iron as compared to grey cast iron is ________________? a. More durable b. Very brittle c. Very hard d. All A., B. & C.
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5) Brine solution is stored/treated in _______________ lined vessels/pipes? a. Rubber b. Lead c. Glass d. Nickel
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6) Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about_______________? a. Half b. One third c. One fifth d. One twelfth
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7) Which of the following has a very high carbide forming tendency in steels ? a. Silicon b. Chromium c. Nickel d. Vanadium
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8) Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ? a. Silicon steel b. Chromium steel c. Molybdenum steel d. None of these
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9) Silicon percentage in iron castings to have maximum hardness should be about__________________? a. 0.3 b. 0.5 c. 0.8 d. 2.5
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10) The electrical conductivity of a ______________ decreases with rise in temperature? a. Metal/alloy b. Semi-conductor c. Dielectric d. None of these
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11) 18/8 stainless steel means, that it contains__________________? a. 18% chromium and 8% nickel b. 18% chromium and 8% molybdenum c. 18% nickel and 8% chromium d. 18% molybdenum and 8% chromium
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12) Aqueous nitric acid is stored in ______________ vessel? a. Plain carbon steel b. Stainless steel c. Cast iron d. Thermosetting plastic material
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13) High speed steel should have high___________________? a. Toughness b. Wear resistance c. Hardenability d. Both B. & C.
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14) Anodic material used for the cathodic protection of underground buried steel pipeline is_________________? a. Nickel or copper b. Zinc or magnesium c. Bronze d. Brass
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15) Wrought iron is a suitable material of construction for handling _____________ solutions? a. Dilute acidic b. Concentrated acidic c. Alkalis & alkaline d. None of these
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16) Galvanising is generally done on___________________? a. Non-ferrous metals b. Low carbon steel c. Stainless steel d. Cast iron
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17) Vycor, a widely used material for making ‘thermal wells’ in temperature measurement, is a_______________? a. Cermet b. Glass c. Thermosetting plastic d. Metallic alloy
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18) Dry chlorine can be handled in a vessel made of__________________? a. Iron or steel b. PVC c. Nickel d. Brass
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19) Combination of metals and ceramics are called___________________? a. Metalloy b. Cermets c. Pellets d. Non-crystalline ceramics
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20) Biological shield in a nuclear power reactor is made of________________? a. Concrete b. Steel c. Cadmium d. Zircaloy
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21) As the impurities are oxidised, the melting point of iron___________________? a. Decreases b. Remains unchanged c. Increases d. May increase or decrease; unpredictable
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22) Nitriding of steel is a process for________________? a. Case hardening b. Spheroidising c. Normalising d. Annealing
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23) German silver is an alloy of copper, nickel and________________? a. Zinc b. Silver c. Tin d. Lead
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24) Which of the following finds the least commercial use ? a. Pure iron b. High silicon iron c. Low carbon steel d. High carbon steel
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25) Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of__________________? a. Stainless steel or glass lined steel b. Nickel clad steel c. High silicon cast iron d. Aluminium
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26) Among the tin containing alloys, ______________ consumes the maximum amount of tin? a. Solder b. White metal c. Pewter metal d. Bronzes
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27) Presence of nitrogen in steel___________________? a. Makes it brittle b. Increases its strength c. Increases its hardness d. Is desirable
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28) _____________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working? a. Solid solution hardening b. Screw dislocation c. Strain ageing d. Twinning
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29) Beehive coke ovens are made of ________________ bricks? a. Silica b. Fireclay c. Silicon carbide d. Corundum
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30) 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 ? a. High silicon iron, silicon rubber, Kel-F and Teflon b. Mild steel and stainless steel c. Cast iron, tin and aluminium d. Copper, nickel and Monel
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