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  1. A good abrasive

  2. A.
    should be friable.
    B.
    should have low refractoriness.
    C.
    is made up of large size of crystals.
    D.
    should be soft.

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  3. Out of the following, __________ pipe is the least corrosion resistant.

  4. A.
    mild steel
    B.
    copper
    C.
    wrought iron
    D.
    stainless steel

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  5. In order to protect the aquatic creatures, the dissolved oxygen content in fresh water stream should never be less than __________ PPm.

  6. A.
    0.5
    B.
    1
    C.
    5
    D.
    20

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  7. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg) ?

  8. A.
    Propane and acetylene
    B.
    Propane and LPG
    C.
    Sewage gas and gobar gas
    D.
    B.F gas and coke oven gas

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  9. Sheardising process is used for

  10. A.
    surface coating.
    B.
    heat treatment of high speed steel.
    C.
    cold working on metals.
    D.
    none of these.

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  11. The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is

  12. A.
    conduction
    B.
    convection
    C.
    both'a' & 'b'
    D.
    radiation

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  13. Which of the following is an inedible oil ?

  14. A.
    Corn oil
    B.
    Tallow oil
    C.
    Olive oil
    D.
    Cotton seed oil

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  15. Light year is the unit of

  16. A.
    distance
    B.
    time
    C.
    intensity of light
    D.
    none of these

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  17. Ingrannular corrosion occurs __________ stainless steel.

  18. A.
    in all types of steels except
    B.
    at the surface of
    C.
    along grain boundaries of
    D.
    in the core of

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  19. In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of

  20. A.
    water hammer
    B.
    cavitation
    C.
    flow separation
    D.
    turbulent mixing

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