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__________ has a negative co-efficient of linear expansion.

A. Iron

B. Copper

C. Rubber

D. Nickel

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. In __________ process, there is an increase in entropy with no degradation of energy.
  2. __________ iron is produced by the annealing of white cast iron.
  3. Which of the following contributes maximum as main source of sulphur in the blast furnace charge?
  4. A common disinfectant used in village wells for disinfection of water is
  5. As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint…
  6. Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
  7. Function of gear box is to
  8. For an ideal gas, Cp - Cv is
  9. Coating provided on the electrodes used in the arc welding is not expected to
  10. LVDT used for displacement measurement is a/an __________ transducer.
  11. A psychrometer does not measure the __________ temperature of moist air.
  12. __________ is not a heat treatment process.
  13. The malleability of a material is the property by virtue of which it can be rolled or hammered into…
  14. There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
  15. The lightest non-inflammable gas is
  16. Identify the correct statement with reference to the extractive metallurgy of aluminium.
  17. Addition of silicon to cast iron
  18. With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________…
  19. Wrought iron is not
  20. __________ metal is used as a bearing liner material.
  21. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used.…
  22. Pick out the wrong statement.
  23. Mild steel has __________ crystal lattice structure.
  24. Dielectric
  25. All of the following alloying elements of steel increases hardness but sacrifice ductility, except
  26. __________ of austenite decreases the hardenability in steel.
  27. The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters…
  28. With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
  29. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
  30. The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature…