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  1. Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of

  2. A.
    paper
    B.
    cloth
    C.
    lead
    D.
    aluminium

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  3. Alloying elements present in Hayness stel-lite, which has superior performance than high speed steel, are

  4. A.
    nickel, cobalt & chromium.
    B.
    tungsten, chromium & cobalt.
    C.
    manganese, chromium & cobalt.
    D.
    tungsten, molybdenum & nickel.

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  5. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively

  6. A.
    7 and 30
    B.
    10 and 50
    C.
    2 and 50
    D.
    13 and 55

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  7. The leaching solvent used in Baeyer's process for the purification of bauxite is

  8. A.
    ammonium hydroxide
    B.
    sodium carbonate
    C.
    sodium hydroxide
    D.
    ammonium carbonate

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  9. Austempering process results in the formation of __________ structure.

  10. A.
    martensitic
    B.
    bainitic
    C.
    carburised
    D.
    stressed

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  11. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

  12. A.
    1.5
    B.
    3
    C.
    5
    D.
    7

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  13. Basic open hearth furnace (BOF) is not used for producing __________ steel.

  14. A.
    killed
    B.
    rimming
    C.
    high alloy
    D.
    none of these

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  15. Principal alloying element in Elinvar (used for making hair springs for watches) is

  16. A.
    copper
    B.
    aluminium
    C.
    nickel
    D.
    zinc

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  17. The value of y = cp/cv. at < 500°C for air & most common gases can be safely assumed to be

  18. A.
    0.8
    B.
    1
    C.
    1.4
    D.
    1.8

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  19. Tesla metre per ampere (T. m/A) is the unit for the measurement of

  20. A.
    magnetic succeptibility.
    B.
    magnetic moment.
    C.
    permeability of free space.
    D.
    flux density.

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