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Chemical Engineering :: Chemical Engineering Basics-2

  1. Presence of sulphur in steel reduces the

  2. A.

     Hardness

    B.

     Grain size

    C.

     Tensile strength

    D.

     Toughness & transverse ductility


  3. For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

  4. A.

     Reynolds number (based on sphere diameter) should be < 1

    B.

     Flow around the sphere should be in turbulent region

    C.

     Sphere must be metallic

    D.

     Fluid density should be constant


  5. 'Ice point' is designated on Farenhite temperature scale by

  6. A.

     0°

    B.

     32°

    C.

     62°

    D.

     212°


  7. Safety matches is produced using

  8. A.

     Red phosphorus

    B.

     Yellow phosphorus

    C.

     Black phosphorus

    D.

     Elemental sulphur


  9. A thin, flat & square plate measuring 2 m x 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m ². The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m² °C.

  10. A.

     50

    B.

     100

    C.

     150

    D.

     200


  11. Material having negative co-efficient of linear expansion is

  12. A.

     Copper

    B.

     Aluminium

    C.

     Rubber

    D.

     Nickel


  13. Fine grained steels have

  14. A.

     High brittleness

    B.

     Higher tendency to distort

    C.

     High ductility

    D.

     None of these


  15. Floating control action

  16. 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


  17. Styrofoam is the commercial name of

  18. A.

     Polyurathene

    B.

     Polystyrene

    C.

     Polyacrylonitrile

    D.

     Polybutadiene


  19. Which of the following is an inedible oil ?

  20. A.

     Corn oil

    B.

     Tallow oil

    C.

     Olive oil

    D.

     Cotton seed oil