40 TOP MATERIALS and CONSTRUCTION Online Test – Multiple Choice Questions and Answers 1. Babbit metals used for making bearings are tin or lead based alloys short of antifrictional properties yellow metals having homogenous microstructure 2. Which of the following has the highest compressive strength ? Cast iron High carbon steel Wrought iron Mild steel 3. Slow and progressive deformation of a material with time under constant stress is called erosion resilience creep none of these 4. __________ possesses viscoelastic properties Rubber Cork Graphite Glass 5. Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of cast iron aluminium rubber lined mild steel lead lined mild steel 6. Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and moving mercury and crimped steel wire graphite and moving mercury moving mercury and graphite moving mercury and carbon 7. Steel tower used for the storage of oleum is lined with lead is lined with acid-proof bricks is lined with rubber need not be lined 8. Brass is an alloy of nickel and tin copper and zinc tin and lead copper, nickel and zinc 9. Cast iron has high malleability very high tensile strenth high ductility elastic limit close to ultimate breaking strength 10. Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ? Aluminium, copper, high silicon iron Nickel, monel, stainless steel and graphite Silicone rubber, teflon, procelain and wood Brass, cast iron, mild steel and tin Loading … Question 1 of 10
