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Chemical Engineering :: Chemical Engineering Basics

  1. Batch process is preferred over continuous process, when the

  2. A.
    product yields and quality can not be achieved in continuous process, because of long residence time.
    B.
    sales demand of product is not steady.
    C.
    same equipment can not be used for several processes of the same nature.
    D.
    all (a), (b) & (c)

  3. Which of the following is a permanent fastening?

  4. A.
    Rivets
    B.
    Bolts
    C.
    Screws
    D.
    Keys

  5. Hot & cold working of material causes its __________ deformation.

  6. A.
    visco-elastic
    B.
    isotropic
    C.
    elastic
    D.
    plastic

  7. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)

  8. A.
    T
    B.
    1/T
    C.
    T2
    D.
    1/T2

  9. In a fuel cell, chemical energy is converted into

  10. A.
    electrical energy directly.
    B.
    mechanical energy.
    C.
    electrical energy and stored therein.
    D.
    none of these.

  11. Which of the following is not a cupro-nick-el alloy ?

  12. A.
    German silver
    B.
    Monel metal
    C.
    Muntz metal
    D.
    None of these

  13. Electrochemical corrosion occurs

  14. A.
    where the liquid electrolytes containing free ions are present.
    B.
    only in alloys.
    C.
    only in pure metals.
    D.
    due to direct chemical action of metal with oxygen.

  15. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

  16. A.
    red
    B.
    extended
    C.
    super
    D.
    extreme

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

  18. A.
    recrystallisation
    B.
    refinement
    C.
    growth
    D.
    recovery

  19. Young's modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablyby

  20. A.
    alloying additions
    B.
    heat treatment
    C.
    cold work
    D.
    increasing temperature