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  1. Which one of the following is incombustible ?

  2. A.
    H2
    B.
    CCl4
    C.
    C2H2
    D.
    S

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  3. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.

  4. A.
    hard
    B.
    soft
    C.
    silicon carbide
    D.
    aluminium oxide

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  5. Tin based white metals are used, where bearings are subjected to

  6. A.
    high pressure & load.
    B.
    low pressure & load.
    C.
    high temperature.
    D.
    large surface wear.

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  7. Friction factor for fluid flow in pipe does not depend upon the

  8. A.
    pipe length.
    B.
    pipe roughness.
    C.
    fluid density & viscosity.
    D.
    mass flow rate of fluid.

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  9. All of the following alloying elements of steel increases hardness but sacrifice ductility, except

  10. A.
    nickel
    B.
    vanadium
    C.
    molybdenum
    D.
    chromium

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  11. The following type of bonding is strongly directional in solids.

  12. A.
    Vander Waal's
    B.
    Ionic
    C.
    Metallic
    D.
    Covalant

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  13. Fog is an example of colloidal system of

  14. A.
    solid dispersed in gas.
    B.
    solid dispersed in liquid.
    C.
    liquid dispersed in gas.
    D.
    gas dispersed in liquid.

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  15. Chromium molybdenum steel can not be welded using __________ welding.

  16. A.
    thermit
    B.
    electrical resistance
    C.
    oxy-acetylene
    D.
    any of these

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  17. Speisses is a mixture of the following:

  18. A.
    Arsenides of heavy metals.
    B.
    Antimonides of heavy metals.
    C.
    Arsenides & antimonides of heavy metals.
    D.
    Iron, cobalt and nickel.

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  19. Auto collimator is used to check

  20. A.
    flatness
    B.
    angle
    C.
    rotor balancing
    D.
    roughness

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