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Chemical Engineering :: Chemical Engineering Basics-2

  1. Dislocation cross-slip is difficult in those materials, which have

  2. A.

     Large number of slip systems

    B.

     High work hardening rate

    C.

     Coarse grain size

    D.

     Low stacking fault energy


  3. The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be

  4. A.

     Parabolic

    B.

     Hyperbolic

    C.

     Straight line

    D.

     None of these


  5. __________ the exhaust gas is an indication of the incomplete combustion of fuel.

  6. A.

     Low temperature of

    B.

     High temperature of

    C.

     High % of CO in

    D.

     High % of CO₂ in


  7. 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.

  8. A.

     Hard

    B.

     Soft

    C.

     Silicon carbide

    D.

     Aluminium oxide


  9. Glycerene is used as a coolant in cooling of some engines instead of water, because

  10. A.

     Its higher boiling point (290°C) increases its heat carrying capacity

    B.

     Compartively less weight of coolant is required

    C.

     Smaller radiator can be used

    D.

     All of the above


  11. For the running of power generating turbines, the steam used should be

  12. A.

     Wet

    B.

     Superheated

    C.

     At ordinary pressure

    D.

     None of these


  13. The material used for coating the welding electrode is termed as the

  14. A.

     Flux

    B.

     Slag

    C.

     Protective layer

    D.

     Binder


  15. Drossing is a __________ operation.

  16. A.

     Smelting

    B.

     Dressing

    C.

     Roasting

    D.

     Dressing


  17. Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.

  18. A.

     Turning

    B.

     Dressing

    C.

     Forming

    D.

     Surface finishing


  19. In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?

  20. A.

     Tin

    B.

     Lead

    C.

     Zinc

    D.

     Glass