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Chemical Engineering :: Chemical Engineering Basics-2

  1. Out of the following, which will fracture most readity, when hit with a hard hammer ?

  2. A.

     Brass

    B.

     Bronze

    C.

     German silver

    D.

     Cast iron

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

  4. A.

     Steel

    B.

     Brass

    C.

     Stainless steel

    D.

     Babbit metal

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  5. Oxyacetylene reducing flame is used while carrying out welding on

  6. A.

     Alloy steel

    B.

     Grey cast iron

    C.

     Mild steel

    D.

     High carbon steel

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  7. Oxyacetylene reducing flame is used while carrying out welding on

  8. A.

     Alloy steel

    B.

     Grey cast iron

    C.

     Mild steel

    D.

     High carbon steel

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  9. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

  10. A.

     23

    B.

     23/2

    C.

     25/2

    D.

     21/3

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  11. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of

  12. A.

     1:1

    B.

     1:2

    C.

     2:1

    D.

     1:4

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  13. __________ of air does not increase with increase in temperature.

  14. A.

     Density

    B.

     Thermal diffusivity

    C.

     Viscosity

    D.

     Thermal conductivity

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  15. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

  16. A.

     Re0.5, Re0.8

    B.

     Re0.8, Re-0.5

    C.

     Re0.8, Re0.5

    D.

     Re-0.8, Re0.5

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  17. Oxygen cylinders used for autogenous (cutting/welding) purposes are

  18. A.

     Seamless & made of steel

    B.

     Heat treated before use

    C.

     Made by sand casting

    D.

     Welded steel cylinders

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  19. To improve the machinability of steel, it is generally subjected to

  20. A.

     Spherodising

    B.

     Tempering

    C.

     Normalising

    D.

     Annealing

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