Home / Chemical Engineering / Chemical Engineering Basics :: Section 23

Chemical Engineering :: Chemical Engineering Basics

  1. Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore ?

  2. A.
    Silica
    B.
    Lime
    C.
    Alumina
    D.
    Fluorite

  3. Which is the most suitable joint for the pipes, with are laid submerged under water, where the bottom of the river bed is uneven ?

  4. A.
    Collar joint
    B.
    Flexible joint
    C.
    Flanged joint
    D.
    Expansion joint

  5. Floating control action

  6. A.
    moves the final control element at constant speed in either direction in response to an error signal.
    B.
    changes the position of the final control element from on to off.
    C.
    is used to counteract rapid load changes.
    D.
    none of these.

  7. Boiler rating is normally done in terms of

  8. A.
    steam temperature & pressure.
    B.
    steam output (tons/hr).
    C.
    heat transfer rate (kcal/hr).
    D.
    heat transfer area (m2).

  9. The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

  10. A.
    A
    B.
    D
    C.
    1/A
    D.
    1/A2

  11. Number of electrons in the outermost orbit of a semi-conductor is

  12. A.
    2
    B.
    4
    C.
    6
    D.
    8

  13. The condition of diffraction from a crystal is given by

  14. A.
    nλ = 2d Sin θ
    B.
    λ = d Sin 2θ
    C.
    λ = 2d Sin 2θ
    D.
    nλ = d Sin θ

  15. Galena is an ore of

  16. A.
    iron
    B.
    copper
    C.
    lead
    D.
    aluminium

  17. A reduction process is accompanied with increase in the

  18. A.
    number of electrons.
    B.
    oxidation number.
    C.
    both (a) & (b).
    D.
    neither (a) nor (b).

  19. Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.

  20. A.
    natural
    B.
    induced
    C.
    forced
    D.
    chimney