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Chemical Engineering :: Chemical Engineering Basics

  1. Ceramic materials are

  2. A.
    organic in nature.
    B.
    stronger in compression than in tension.
    C.
    always amorphous in nature.
    D.
    always bad heat conductors.

  3. Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

  4. A.
    Anodising
    B.
    Tempering
    C.
    Carburising
    D.
    Annealing

  5. Heat required to raise the temperature of a body by 1 °C is called its

  6. A.
    heat capacity.
    B.
    specific heat capacity.
    C.
    thermal conductivity.
    D.
    water equivalent.

  7. Coating of zinc over steel is known as

  8. A.
    cladding
    B.
    galvanising
    C.
    anodising
    D.
    passivation

  9. Air-petrol ratio in an automotive petrol engine is around

  10. A.
    14 : 1
    B.
    22 : 1
    C.
    25 : 1
    D.
    4 : 1

  11. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation is called

  12. A.
    resilience
    B.
    toughness
    C.
    ductility
    D.
    impact strength

  13. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

  14. A.
    occurs higher in the electro-chemical series of metals.
    B.
    is exemplified by magnesium plate.
    C.
    is much cheaper than the cathodic base material to be guarded against corrosion.
    D.
    all (a), (b) & (c).

  15. Electrochemical corrosion can occur, only if __________ is present in contact with metal.

  16. A.
    air
    B.
    oxygen
    C.
    liquid medium
    D.
    gaseous medium

  17. Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding

  18. A.
    glycerol
    B.
    nitro cellulose
    C.
    camphor
    D.
    none of these

  19. Preheating prior to welding is done for the purpose of

  20. A.
    decreasing cooling rate.
    B.
    facilitating fusion of high melting metals.
    C.
    preventing hot cracking.
    D.
    ensuring full penetration.