1) Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of __________________? a. Nickel b. Copper c. Stainless steel d. Brass
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2) Sulphuric acid pickling tanks are lined with__________________? a. Nickel b. Rubber c. Aluminium d. Glass
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3) With increase in carbide/graphite ratio in cast iron, its__________________? a. Hardness & brittleness increases b. Ductility decreases c. Both A. and B. d. Neither A. nor B.
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4) Which is an amorphous material ? a. Glass b. Mica c. Brass d. Cast iron
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5) Ammonium chloride solution is stored/ treated in _____________ vessels/pipes? a. Plain carbon steel b. Stainless steel c. Rubber or durmet-20 lined d. Lead
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6) In order to be called steel, an alloy should have iron percentage greater than____________________? a. 80 b. 70 c. 90 d. 50
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7) The process of heating the cold pressed metallic powder is called ______________ in powder metallurgy? a. Precipitation b. Fusion c. Sintering d. Agglomeration
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8) The carbonating tower used in Solvay process of soda ash manufacture is made of_________________? a. Cast iron b. Stainless steel c. Karbate d. Lead lined steel
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9) Which of the following alloys does not contain nickel ? a. Chloro, et-2 alloy b. Monel c. Inconel d. Babbitt metal
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10) Hardest material so far found is__________________? a. Diamond b. Graphite c. Carborundum d. Pumice stone
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11) The heat treatment process to which castings and the steel balls produced by cold heading are subjected is____________________? a. Tempering b. Normalising c. Annealing d. None of these
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12) Which of the following has the highest density and the lowest melting point ? a. Stainless steel b. Titanium c. Lead d. Aluminium
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13) Which of the following is the hardest _______________? a. Cementite b. Pearlite c. Austenite d. Ferrite
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14) For platinum thermocouples, lead wires are made of___________________? a. Copper & copper-nickel alloys b. Copper & iron c. Iron & nickel d. Tin & nickel
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15) Which of the following is the lightest of engineering metals ? a. Magnesium b. Aluminium c. Titanium d. Tin
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16) The most resistant material to alkaline corrosion is____________________? a. Duriron b. Nickel c. Aluminium d. Karbate
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17) Plate and frame filter press is usually made of__________________? a. Mild steel b. Cast iron c. Stainless steel d. Galvanised iron
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18) Nickel is a constituent of ________________________? a. Bronze b. Solder c. Duralumin d. Monel metal
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19) Platinum and silver are corroded by___________________? a. Caustic soda solution b. Phosphoric acid c. Sulphuric acid (10%) d. None of these
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20) Valves in pipe size of 2″ and under are normally made of_______________________? a. Wrought iron b. Brass c. Bronze d. Monel
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21) Wood metal is not used for making___________________? a. Soft solder b. Casting for dental work c. Storage tank for storing brine and caustic soda d. Fusible safety plug for pressure cooker
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22) Nickel (76%) and chromium (15%) alloys are termed as______________________? a. Inconel b. Monel c. Aluminium bronzes d. Brass
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23) Babbitt metal is not a___________________________? a. Tin base alloy b. White metal c. Lead base alloy d. Pure metal
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24) Photographic plates are coated with_________________? a. Silver nitrate b. Silver halide c. Calcium silicate d. Metallic silver
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25) Presence of 0.3 to 0.5% arsenic in copper increases its____________________? a. Ductility b. Malleability c. Tenacity & hardness d. Electrical conductivity
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26) Acetylene gas holder is made of__________________? a. Copper b. Cast iron c. Steel d. Monel metal
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27) Babbitt metals used for making bearings are _________________? a. Tin or lead based alloys b. Short of antifrictional properties c. Having homogenous microstructure d. Yellow metals
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28) Carbon percentage is the same in cast iron and_________________? a. Wrought iron b. Pig iron c. Mild steel d. High silicon (14%) iron
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29) Nickel (56%) and molybdenum (17%) alloys are called________________? a. Monel b. Hastelloy C c. Inconel d. Bronzes
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30) Specify the material of construction suitable for handling concentrated HNO3 at 100°C ? a. High silicon iron, Kel-F and Teflon b. Tin and wood c. Silicone rubber d. Stainless steel
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