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Chemical Engineering :: Chemical Engineering Basics

  1. Which one of the following is incombustible ?

  2. A.
    H2
    B.
    CCl4
    C.
    C2H2
    D.
    S

  3. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.

  4. A.
    hard
    B.
    soft
    C.
    silicon carbide
    D.
    aluminium oxide

  5. Tin based white metals are used, where bearings are subjected to

  6. A.
    high pressure & load.
    B.
    low pressure & load.
    C.
    high temperature.
    D.
    large surface wear.

  7. Friction factor for fluid flow in pipe does not depend upon the

  8. A.
    pipe length.
    B.
    pipe roughness.
    C.
    fluid density & viscosity.
    D.
    mass flow rate of fluid.

  9. All of the following alloying elements of steel increases hardness but sacrifice ductility, except

  10. A.
    nickel
    B.
    vanadium
    C.
    molybdenum
    D.
    chromium

  11. The following type of bonding is strongly directional in solids.

  12. A.
    Vander Waal's
    B.
    Ionic
    C.
    Metallic
    D.
    Covalant

  13. Fog is an example of colloidal system of

  14. A.
    solid dispersed in gas.
    B.
    solid dispersed in liquid.
    C.
    liquid dispersed in gas.
    D.
    gas dispersed in liquid.

  15. Chromium molybdenum steel can not be welded using __________ welding.

  16. A.
    thermit
    B.
    electrical resistance
    C.
    oxy-acetylene
    D.
    any of these

  17. Speisses is a mixture of the following:

  18. A.
    Arsenides of heavy metals.
    B.
    Antimonides of heavy metals.
    C.
    Arsenides & antimonides of heavy metals.
    D.
    Iron, cobalt and nickel.

  19. Auto collimator is used to check

  20. A.
    flatness
    B.
    angle
    C.
    rotor balancing
    D.
    roughness