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  1. Dislocation cross-slip is difficult in those materials, which have

  2. A.
    large number of slip systems.
    B.
    high work hardening rate.
    C.
    coarse grain size.
    D.
    low stacking fault energy.

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  3. Shrinkage allowance on pattern is provided to compensate for shrinkage when the

  4. A.
    metal changes from liquid state to solid state at freezing temperature.
    B.
    solid phase temperature drops from freezing temperature to the room temperature.
    C.
    liquid metal temperature drops from pouring temperature to room temperature.
    D.
    liquid metal temperature drops from pouring temperature to freezing temperature.

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  5. Spark plug is provided in a/an

  6. A.
    engine having carburettor.
    B.
    diesel engine.
    C.
    compression ignition engine.
    D.
    both(b) & (c).

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

  10. 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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  11. Lead pencil contains

  12. A.
    graphite
    B.
    lead sulphide
    C.
    lead
    D.
    both(b) & (c)

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  13. Function of gear box is to

  14. A.
    reduce the speed.
    B.
    obtain variable speed.
    C.
    increase the speed.
    D.
    produce high torque.

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  15. Pearlite comprises of

  16. A.
    87% cementite & 13% Fe.
    B.
    87% ferrite & 13% cementite.
    C.
    93.33% ferrite & 6.67% C.
    D.
    87% ferrite & 13% C.

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  17. Which of the following if present in iron ore, enhances its value ?

  18. A.
    Alumina
    B.
    Alkali oxide
    C.
    Lime & Magnesia
    D.
    None of these

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  19. As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

  20. A.
    110
    B.
    85
    C.
    60
    D.
    45

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