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  1. Mechanism/phenomenon involved in the improvement of fatigue strength of a material by shot peening is the

  2. A.

     Induction of residual compressive stress on the surface

    B.

     Removal of stress concentration from the surface

    C.

     Grain refinement

    D.

     Surface polishing

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  3. __________ test is the appropriate test to determine whether a material is ductile or brittle.

  4. A.

     Impact

    B.

     Cupping

    C.

     Hardness

    D.

     Tensile

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  5. The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its

  6. A.

     Flexibility

    B.

     Plasticity

    C.

     Hardness

    D.

     Hardenability

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  7. __________ can not increase the fatigue strength of a material.

  8. A.

     Grain refining

    B.

     Grain coarsening

    C.

     Surface hardening

    D.

     Shot peening

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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. Primary designation of steel is based on its

  12. A.

     Hardness & tensile strength

    B.

     Carbon content

    C.

     Iron content

    D.

     Alloying elements content

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  13. Dislocations are __________ defects.

  14. A.

     Point

    B.

     Line

    C.

     Volume

    D.

     None of these

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  15. Which of the following are considered applications of ultrasonic testing ?

  16. A.

     Determination of elastic constant

    B.

     Detection of defects in metal

    C.

     Measurement of material thickness

    D.

     None of the above

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  17. The most commonly used moderator in nuclear power plant is

  18. A.

     Graphite

    B.

     Light water

    C.

     Heavy water

    D.

     Berellium

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  19. With increase in pressure, the saturation temperature of steam

  20. A.

     Increases rapidly first and then slowly

    B.

     Increases slowly first and then rapidly

    C.

     First increases and then decreases

    D.

     None of these

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