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Chemical Engineering :: Chemical Engineering Basics-2

  1. The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.

  2. A.

     Yield

    B.

     Proof

    C.

     Ultimate

    D.

     None of these


  3. When the wavelength of incident X-rays increases, the angle of diffraction

  4. A.

     Decreases

    B.

     Increases

    C.

     Remains constant

    D.

     Shows no systematic variation


  5. Fibre glass is a composite material of

  6. A.

     Glass fibre in a polymer matrix

    B.

     Glass fibre in a metallic matrix

    C.

     Polymer fibre in a glassy matrix

    D.

     Both B & C


  7. In connection with corrosion of metals, passivation is the process that

  8. A.

     Intensifies deterioration

    B.

     Changes the composition of the metal

    C.

     Inhibits further deterioration

    D.

     None of these


  9. Most of the phosphorous present in the blast furnace burden enters into

  10. A.

     Hot metal

    B.

     Flue gases

    C.

     Slag

    D.

     Refractory lining


  11. Basicity [%Cao + %MgO/% SiO₂) of the slag in Indian blast furnace is in the range of

  12. A.

     0.7-1.0

    B.

     1.1-1.4

    C.

     1.5 - 1.8

    D.

     2.0 - 2.5


  13. Thermoplastics are never moulded using

  14. A.

     Injection moulding

    B.

     Blow moulding

    C.

     Extrusion

    D.

     Compression moulding


  15. Which of the following absorbs maximum heat in a high pressure boiler ?

  16. A.

     Economiser

    B.

     Steam superheater

    C.

     Air preheater

    D.

     Furnace water wall


  17. Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.

  18. A.

     Diminishing balance

    B.

     Sinking fund

    C.

     Multiple straight line

    D.

     Sum of the years digit


  19. While the bin cards are used in the effective stores management, the queing theory is associated with the __________ time.

  20. A.

     Waiting

    B.

     Idle

    C.

     Inspection

    D.

     Tool replacement