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Mechanical Engineering :: Engineering Materials

  1. Macro-structure of a material is, generally, examined by

  2. A.
    naked eye
    B.
    optical microscope
    C.
    metallurgical microscope
    D.
    X-ray techniques

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  3. Aluminium has low density and addition of silicon improves its fluidity and therefore, its castability.

  4. A.
    Correct
    B.
    Incorrect

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  5. Which of the following property is desirable for materials used in tools and machines?

  6. A.
    Elasticity
    B.
    Plasticity
    C.
    Ductility
    D.
    Malleability

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  7. Babbit metal is a

  8. A.
    lead-base alloy
    B.
    copper-base alloy
    C.
    tin-base alloy
    D.
    cadmium-base alloy

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  9. The metal suitable for bearings subjected to heavy loads, is

  10. A.
    silicon bronze
    B.
    white metal
    C.
    monel metal
    D.
    phosphor bronze

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  11. The compressive strength of cast iron is __________ that of its tensile strength.

  12. A.
    equal to
    B.
    less than
    C.
    more than

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  13. When a steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of

  14. A.
    mainly ferrite
    B.
    mainly pearlite
    C.
    ferrite and pearlite
    D.
    pearlite and cementite

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  15. Eutectoid reaction occurs at

  16. A.
    600°C
    B.
    723°C
    C.
    1147°C
    D.
    1493°C

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  17. The addition of copper to aluminium possesses maximum strength after heat treatment and age-hardening

  18. A.
    Correct
    B.
    Incorrect

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  19. Nickel when added to copper improves

  20. A.
    machinability
    B.
    hardness
    C.
    hardness and strength
    D.
    strength and ductility

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