Home / Chemical Engineering / Chemical Engineering Basics :: Section 18

Chemical Engineering :: Chemical Engineering Basics

  1. Sewage is not an excellent medium for the growth of

  2. A.
    aquatic creatures.
    B.
    protozoa.
    C.
    virus.
    D.
    pathogenic bacteria.

  3. Which of the following pair is correctly matched?

  4. A.
    Heat transfer: Thermal diffusivity.
    B.
    Mass transfer: Diffusion co-efficient.
    C.
    Momentum transfer: Kinematic viscosity.
    D.
    all 'a', 'b' & 'c' are correctly matched.

  5. Rate of chemical reaction is not much affected, if the reactants are in __________ form.

  6. A.
    solids
    B.
    liquids
    C.
    either (a) or (b)
    D.
    gaseous

  7. Materials used for making permanent magnets containing iron and nickel are made by __________ technique.

  8. A.
    powder metallurgy
    B.
    casting
    C.
    forging
    D.
    none of these

  9. Lubrication is done to control

  10. A.
    friction
    B.
    wear
    C.
    temperature
    D.
    all (a), (b) & (c)

  11. Lead is most readily dissolved in

  12. A.
    acetic acid
    B.
    hydrochloric acid
    C.
    nitric acid
    D.
    sulphuric acid

  13. Which of the following is a synthetic abrasive ?

  14. A.
    Corundum
    B.
    Emery
    C.
    Pumice
    D.
    Silicon carbide

  15. Dezincification is a form of corrosion, which specifically applies to

  16. A.
    steel
    B.
    brass
    C.
    stainless steel
    D.
    babbit metal

  17. Water hammer in pipelines results, when the flowing fluid

  18. A.
    has very high velocity.
    B.
    has very high pressure.
    C.
    is brought to rest by gradually closing a valve.
    D.
    is suddenly brought to rest by closing a valve.

  19. The preferred alloying element for low temperature applications of steel is

  20. A.
    Cr
    B.
    N
    C.
    Mo
    D.
    Ni