1) Glass lined vessels are not used for handling__________________? a. Dilute H2SO4 b. Dilute HNO3 c. Dilute HCI d. Hydrofluoric acid
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2) Which of the following is the most elastic material ? a. Plastic b. Glass c. Steel d. Rubber
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3) Materials having _____________ lattice structure are usually most ductile? a. FCC b. BCC c. HCP d. Cubic
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4) ____________ alloys have the highest specific strength of all the structural materials out of the following? a. Magnetic steel b. Titanium c. Chromium d. Magnesium
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5) Shock resisting steels should possess high___________________? a. Hardness b. Toughness c. Tensile strength d. Wear resistance
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6) Out of the following, copper vessels are the most suitable for the storage of__________________? a. Bromine b. Dry chlorine & dry fluorine c. Nitric acid (95% and fuming) d. Phosphoric acid (95%) & sulphuric acid (95% and fuming)
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7) Plasticisers are added to polymers to improve their____________________? a. Tensile strength b. Softness & flexibility c. Acid resistance d. Alkali resistance
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8) Titanium metal_________________? a. Exists in three allotropic forms b. Cannot be welded c. Is used in oceanographic and space exploration applications d. None of these
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9) Graphite is corroded by_________________? a. Sulphuric acid (10%) b. Sea water c. Hydrochloric acid d. None of these
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10) Creep is not exhibited at low temperature by _____________________? a. Rubber b. Acrylics c. Lead d. Plastics
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11) Which of the following exercises most powerful influence on the mechanical properties of steel ? a. Manganese b. Carbon c. Phosphorous d. Silicon
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12) Babbitt metal (used for making bearings) comprises of__________________? a. Mainly tin (85%) and lead b. Saw dust and iron dust mixture c. Zinc and aluminium d. Copper and aluminium
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13) Acid proof stoneware_________________? a. Has very low strength b. Cannot be heated c. Is broken by small temperature changes d. All A., B. and C.
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14) Light weight metallic alloy used in aircraft industry is________________? a. Aluminium b. High silicon (14%) iron c. Duralumin d. Phosphor bronze
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15) Which one contains the least percentage of carbon ? a. Wrought iron b. High speed steel c. Cast iron d. Pig iron
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16) Ceramic materials are____________________? a. Organic in nature b. Stronger in compression than in tension c. Always amorphous in nature d. Always bad heat conductors
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17) Plastics are____________________? a. Used in very high temperature applications b. Non-biodegradable c. Not suitable for drainage pipe manufacture d. All A., B. & C.
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18) SO3 is absorbed using H2SO4 in a____________________? a. Cast iron packed tower b. Stainless steel plate tower c. Packed steel tower lined with acid proof bricks d. None of these
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19) Nitriding of steel is done (in electric furnace) at _____________ °C? a. 510 b. 1720 c. 2210 d. 910
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20) Brass is an alloy of____________________? a. Nickel and tin b. Copper and zinc c. Tin and lead d. Copper, nickel and zinc
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21) A hardened steel essentially contains___________________? a. Sorbite b. Troostite c. Martensite d. None of these
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22) Silicone rubber is not resistant to the corrosive action of____________________? a. Sulphuric acid (10%) b. Sulphuric acid (95%) c. Ether d. Both B. and C.
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23) The fermenter used in the production of penicillin (by deep fermentation process) is made of___________________? a. Glass b. Glass lined steel c. High silicon cast iron d. Porcelain
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24) The heat treatment process applied to cold formed steel parts is ____________________? a. Normalising b. Tempering c. Artificial ageing d. Solution annealing
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25) An ideal material of construction for the storage of 50% caustic soda solution would be___________________? a. Karbate b. High silicon cast iron c. Monel d. None of these
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26) Stainless steel is not corroded by _____________________? a. Hydrochloric acid (10%) b. Nitric acid (10%) c. Sulphuric acid (10%) d. Saturated brine
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27) In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________? a. Copper b. Platinum c. Constantan d. Chromium
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28) Addition of 2% nickel in steel makes it suitable for making ___________________? a. Electronic valves b. Boiler plates, rivets etc. c. Turbine blades d. Connecting rod
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29) Low carbon steels are those in which carbon percentage is around____________________? a. 0.1 to 0.35 b. 0.4 to 0.7 c. 0.8 to 1.5 d. 1.5 to 2
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30) Nickel and copper are the basic constituents of__________________? a. Hastelloy b. Monel metal c. German silver d. Inconel
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