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Chemical Engineering :: Chemical Engineering Basics-2

  1. Which of the following metals can not be hot worked at room temperature?

  2. A.

     Zinc

    B.

     Nickel

    C.

     Lead

    D.

     Tin


  3. Improvement in mechanical properties of metals in its hot working is due to the grains

  4. A.

     Recrystallisation

    B.

     Refinement

    C.

     Growth

    D.

     Recovery


  5. High __________ of cast iron makes it suitable for use in machine beds.

  6. A.

     Compressive strength

    B.

     Endurance strength

    C.

     Damping capacity

    D.

     Tensile strength


  7. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.

  8. A.

     Tensile

    B.

     Fatigue

    C.

     Impact

    D.

     None of these


  9. Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is

  10. A.

     38

    B.

     26

    C.

     16

    D.

     4


  11. Stainless steel is welded using

  12. A.

     Oxy-acetylene flame

    B.

     Oxy-hydrogen flame

    C.

     Arc welding

    D.

     Inert gas arc welding


  13. Pick out the wrong statement about the machinability of metals. Machinability of a metal

  14. A.

     Decreases with increase in strain hardening tendencies

    B.

     Decreases with increase in hardness, in general

    C.

     Depends on the composition, microstructure and physical & mechanical properties

    D.

     Decreases with increases in tensile strength & decrease in grain size


  15. Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal

  16. A.

     Tensile strength

    B.

     Compressive strength

    C.

     Young's modulus

    D.

     Thermal co-efficient of expansion


  17. Temper brittleness of a material can be fairly detected by the __________ test.

  18. A.

     Fatigue

    B.

     Notched bar impact

    C.

     Tensile

    D.

     Hardness


  19. Hardening of steel is not possible, unless it is heated __________ critical point.

  20. A.

     Above the highest

    B.

     Above the lowest

    C.

     Between the first & second

    D.

     Between the second & third