chemical-engineering-materials-and-construction Related Question Answers

1. Ceramic recuperators are generally made of





2. Hammers and railway rails are normally made of





3. Softness of silver can be converted into hardness by alloying it with small quantity of





4. The addition of antimony in tin-based alloys improves its





5. The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability ?





6. The main purpose of galvanising iron sheets is to





7. The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.





8. Invar used in thermocouples is an alloy of nickel and





9. Nickel (56%) and molybdenum (17%) alloys are called





10. Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by





11. Residual magnetism in steel for magnets is increased by the addition of





12. Presence of nickel in steel improves its





13. Cementite is





14. Acetylene gas holder is made of





15. Sulphur melting pit in the sulphuric acid plant is made of





16. The hardest material just prior to diamond in Mho's scale is





17. Percentage elongation of a material is a measure of its





18. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with





19. Heavy duty bearings are usually made of





20. Dielectric strength of a material is





21. Which of the following stainless steels is non-magnetic ?





22. 18-4-1 high speed steel contains 18%, 4% and 1% respectively of





23. Aluminium as a material of construction suffers from the disadvantage of





24. Babbit metal used for bearings is a____base alloy.





25. 18/8 steel is a/an __________ stainless steel.





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